Parthian Ships 1928 +

Kaiser Kirk · March 17, 2024, 02:34:57 PM

The 1922 refurbishment left the engines in place, but replaced the main guns.
This is a 'light' refit, not touching the secondary battery.
I expect I will do a full refurbishment in a year or two, replacing the engines and will
address the 120mm battery then, probably replacing with 115mm in tiers... !!

the 1931 Basic AA refit

41t - 2G 57mm -> 4G 37mm 22t mag
4t - Add 8x 23mm
5t - Paravanes
25t - replace LR radios
109t - FC 1930
Total : 179

Quote
Asbara BR31 Ref22, Parthian Armored Cruiser laid down 1908

Displacement:
   14,744 t light; 15,584 t standard; 17,333 t normal; 18,733 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (583.99 ft / 577.43 ft) x 68.90 ft x (26.25 / 27.96 ft)
   (178.00 m / 176.00 m) x 21.00 m x (8.00 / 8.52 m)

Armament:
8 - 10.04" / 255 mm 50.0 cal guns - 535.72lbs / 243.00kg shells, 135 per gun
     Breech loading guns in turret on barbette mounts, 1904 Model
     4 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
8 - 4.72" / 120 mm 45.0 cal guns - 52.91lbs / 24.00kg shells, 250 per gun
     Quick firing guns in deck mounts, 1904 Model
     8 x Single mounts on side ends, evenly spread
      4 raised mounts - superfiring
12 - 4.72" / 120 mm 45.0 cal guns - 52.91lbs / 24.00kg shells, 250 per gun
     Quick firing guns in casemate mounts, 1904 Model
     12 x Single mounts on sides, evenly spread
      12 hull mounts in casemates- Limited use in heavy seas
24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1929 Model
     4 x 2 row quad mounts on sides, evenly spread
      4 raised mounts
     2 x 2 row quad mounts on centreline ends, evenly spread
      2 double raised mounts
8 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 1,200 per gun
     Anti-air guns in deck mounts, 1929 Model
     4 x Twin mounts on side ends, evenly spread
      4 double raised mounts
Weight of broadside 5,389 lbs / 2,444 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.68" / 195 mm   340.68 ft / 103.84 m   12.17 ft / 3.71 m
   Ends:   1.97" / 50 mm   236.71 ft / 72.15 m   12.17 ft / 3.71 m
   Upper:   3.94" / 100 mm   307.87 ft / 93.84 m   6.56 ft / 2.00 m
     Main Belt covers 91 % of normal length

- Hull void:
      0.00" / 0 mm   345.47 ft / 105.30 m   18.86 ft / 5.75 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   8.46" / 215 mm   3.94" / 100 mm      7.68" / 195 mm
   2nd:   0.98" / 25 mm     -           -
   3rd:   3.94" / 100 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   0.31" / 8 mm     -           -

- Protected deck - multiple decks:
   For and Aft decks: 3.35" / 85 mm
   Forecastle: 0.98" / 25 mm Quarter deck: 1.57" / 40 mm

- Conning towers: Forward 7.68" / 195 mm, Aft 3.94" / 100 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 64,013 shp / 47,754 Kw = 27.00 kts
   Range 8,800nm at 12.00 kts
   Bunker at max displacement = 3,148 tons

Complement:
   754 - 981

Cost:
   £1.470 million / $5.878 million

Distribution of weights at normal displacement:
   Armament: 1,090 tons, 6.3 %
     - Guns: 1,090 tons, 6.3 %
   Armour: 4,639 tons, 26.8 %
     - Belts: 1,917 tons, 11.1 %
     - Armament: 1,029 tons, 5.9 %
     - Armour Deck: 1,526 tons, 8.8 %
     - Conning Towers: 168 tons, 1.0 %
   Machinery: 3,233 tons, 18.7 %
   Hull, fittings & equipment: 5,220 tons, 30.1 %
   Fuel, ammunition & stores: 2,589 tons, 14.9 %
   Miscellaneous weights: 562 tons, 3.2 %
     - Hull below water: 178 tons
     - Hull void weights: 45 tons
     - Hull above water: 40 tons
     - On freeboard deck: 115 tons
     - Above deck: 184 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     18,117 lbs / 8,218 Kg = 35.8 x 10.0 " / 255 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.08
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 15.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 54 %
         - Recoil effect (Restricted arc if above 1.00): 0.71
   Seaboat quality (Average = 1.00): 1.09

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.581 / 0.589
   Length to Beam Ratio: 8.38 : 1
   'Natural speed' for length: 24.03 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 12.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   26.00 %, 26.44 ft / 8.06 m, 24.08 ft / 7.34 m
     - Forward deck:   23.00 %, 24.08 ft / 7.34 m, 21.69 ft / 6.61 m
     - Aft deck:   36.00 %, 13.48 ft / 4.11 m, 13.48 ft / 4.11 m
     - Quarter deck:   15.00 %, 13.48 ft / 4.11 m, 15.12 ft / 4.61 m
     - Average freeboard:      18.77 ft / 5.72 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.4 %
      - Above water (accommodation/working, high = better): 123.8 %
   Waterplane Area: 28,584 Square feet or 2,656 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 129 lbs/sq ft or 630 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.38
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

Misc Weight : as refurbished 1922
Const Resv : 5t

AD
109t Fire Control 1930
25t LR Radio
0t SR Radio
25t Searchlight Tower (NF)
25t Hulesmeyer

OD
5t - Paravanes
75t- Additional ventilation
25t - Armed Float Plane
5t - Gunpowder Cat
5t - Hanger structure amidships

HABW
40t - Torpedo flat on stern, above armor deck, 18" , 2 tubes each beam firing through ports.

HBW
178t - torpedo nets

Decks : Engineering spaces 4m high, other decks 2.5m
+6.61m Forecastle deck
+4.11m Weather Deck, Top of upper belt (covers B to Y), top 25mm upper armored deck
+2.11m Top of Main belt, protects slopes of deck from diving shells.
+1.61m 3rd, Armor Deck, Crown of 60mm protective deck
-0.89m 2nd deck. lower edge of protective deck, bottom of main belt
-1.60m bottom of main belt
-3.39m 1st Deck
-7.39m 4m high Engineering Deck

Kaiser Kirk · March 17, 2024, 02:42:02 PM

The Kalifern class is a class I like..oddly better than the 20-gun Vazyra even though it has a mere 16 guns.
But the 365L50 is an excellent gun, paired with strong armor and even my first armored magazine.

Anyhow, upgrading the 130 mounts, I researched 1925 130L50 32kg with the HALA mount to replace the old ...1915? 130L50 32kg in the AS mount....and then I decided to research the new 130L47 with 39kg shell.

1931 Basic AA refit upgraded the AA weaponry and added 1930 FC...which with 16x 365L50 is expensive !!

130AS -> 130 HA/LA
90L50 -> 90L54 HA/LA
2G 57 - 4G 37 24tmag
15mm -> 23mm
Subtotal : 847

622t FC -> 1930
25t Replace LR radio
5t - Add paravanes

Total : 1,499

Quote
Kalifern BR31, Parthian Battleship laid down 1923

Displacement:
   37,999 t light; 41,568 t standard; 44,212 t normal; 46,326 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (623.12 ft / 616.80 ft) x 114.83 ft (Bulges 124.67 ft) x (31.33 / 32.71 ft)
   (189.93 m / 188.00 m) x 35.00 m (Bulges 38.00 m) x (9.55 / 9.97 m)

Armament:
16 - 14.37" / 365 mm 50.0 cal guns - 1,719.61lbs / 780.00kg shells, 160 per gun
     Breech loading guns in turret on barbette mounts, 1923 Model
     4 x 4-gun mounts on centreline, evenly spread
      2 raised mounts
16 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 227 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     8 x 2-gun mounts on sides, evenly spread
10 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     6 x Single mounts on sides, evenly spread
      6 raised mounts
     2 x 2-gun mounts on centreline ends, evenly spread
      2 double raised mounts
16 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 1,200 per gun
     Anti-air guns in deck and hoist mounts, 1929 Model
     4 x 2 row quad mounts on side ends, evenly spread
      4 double raised mounts
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 2,800 per gun
     Machine guns in deck mounts, 1929 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
Weight of broadside 28,920 lbs / 13,118 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   400.92 ft / 122.20 m   13.32 ft / 4.06 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length
     Main Belt inclined -10.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   400.92 ft / 122.20 m   34.94 ft / 10.65 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

- Hull Bulges:
      0.35" / 9 mm   394.52 ft / 120.25 m   23.13 ft / 7.05 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   16.7" / 425 mm   7.87" / 200 mm      13.8" / 350 mm
   2nd:   1.97" / 50 mm   1.38" / 35 mm      1.57" / 40 mm
   3rd:   0.98" / 25 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   0.24" / 6 mm     -           -
   5th:   0.12" / 3 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 5.48" / 139 mm
   Forecastle: 1.38" / 35 mm Quarter deck: 3.94" / 100 mm

- Conning towers: Forward 13.78" / 350 mm, Aft 2.95" / 75 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 39,000 shp / 29,094 Kw = 20.11 kts
   Range 8,722nm at 14.00 kts
   Bunker at max displacement = 4,758 tons

Complement:
   1,523 - 1,981

Cost:
   £12.426 million / $49.705 million

Distribution of weights at normal displacement:
   Armament: 6,220 tons, 14.1 %
     - Guns: 6,220 tons, 14.1 %
   Armour: 14,155 tons, 32.0 %
     - Belts: 3,322 tons, 7.5 %
     - Torpedo bulkhead: 1,163 tons, 2.6 %
     - Bulges: 120 tons, 0.3 %
     - Armament: 4,112 tons, 9.3 %
     - Armour Deck: 4,988 tons, 11.3 %
     - Conning Towers: 451 tons, 1.0 %
   Machinery: 1,303 tons, 2.9 %
   Hull, fittings & equipment: 14,609 tons, 33.0 %
   Fuel, ammunition & stores: 6,212 tons, 14.1 %
   Miscellaneous weights: 1,711 tons, 3.9 %
     - Hull below water: 592 tons
     - Bulge void weights: 281 tons
     - Hull above water: 76 tons
     - On freeboard deck: 65 tons
     - Above deck: 697 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     55,119 lbs / 25,002 Kg = 37.1 x 14.4 " / 365 mm shells or 10.4 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 8.8 ft / 2.7 m
   Roll period: 17.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.53
   Seaboat quality (Average = 1.00): 1.28

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a round stern
   Block coefficient (normal/deep): 0.642 / 0.645
   Length to Beam Ratio: 4.95 : 1
   'Natural speed' for length: 24.84 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   Bow angle (Positive = bow angles forward): 13.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 27.40 ft / 8.35 m, 24.93 ft / 7.60 m
     - Forward deck:   20.00 %, 24.93 ft / 7.60 m, 22.47 ft / 6.85 m
     - Aft deck:   45.00 %, 14.27 ft / 4.35 m, 14.27 ft / 4.35 m
     - Quarter deck:   15.00 %, 14.27 ft / 4.35 m, 14.27 ft / 4.35 m
     - Average freeboard:      18.49 ft / 5.64 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 98.3 %
      - Above water (accommodation/working, high = better): 115.7 %
   Waterplane Area: 53,872 Square feet or 5,005 Square metres
   Displacement factor (Displacement / loading): 99 %
   Structure weight / hull surface area: 247 lbs/sq ft or 1,207 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.57
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

1931 Basic AA refit upgraded the AA weaponry and added 1930 FC.

130AS -> 130 HA/LA
90L50 -> 90L54 HA/LA
2G 57 - 4G 37 24tmag
15mm -> 23mm
Subtotal : 847

622t FC -> 1930
25t Replace LR radio
5t - Add paravanes

Total : 1,499

Kalifern
Dropping the Q turret of the prior class, the limited arcs
mean most of the firepower is retained, and with the upgrade
to the 50 caliber gun, they expect nearly the same combat
effectiveness from the smaller ship.
On paper the throwwieght is 91% the same, but with the improvements in sectional density and better arcs, they expect no functional difference.

Deck Guns
Deck guns are echloned outwards, like on Iowa,
allowing 4 to bear ahead (8 guns), or 4 on each side.
The single 90m AA are above them.

Main Belt Armor
This embraces "all or nothing", but only has 1 deck level unprotected aft and 2 forward.
The main armor deck caps the belt at 1.5m.

Outsloped Wedge shaped Belt
Three steps
1) Figure adjusted height for wedge
2) figure % additional belt height for outsloping
3) apply +% to effective height of wedge.

Step 1
In the VII version, the lower portion of the belt tapers.
The upper 2.5m is a uniform 350mm, extending 0.5m below WL.
the lower 1.5m tapers from 350mm down to 310mm.

Mathwise that means there are 3 sections.
| |
| | A ) Upper, 2500mm (2.5m) x 350mm
\ | |
\| | C) Lower back , 1500 (1.5m) x 310mm
B) Wedge 1/2B x H :
B = 1.5m = 1500
H = 350-310 = 40

A) = 875,000
B) = 30,000
C) = 465,000

SubTotal : 1,370,000
Modeled as average 350mm thickness = /350
Total : 3,914.27857 = 3.91m

Belt is slightly outsloped by 15%.
Step 2 Outsloping
Overall it is 4m high. which is "A" or adjacent
COS 10 = A/H
H* Cos 15 = A
H = A/Cos 15

Which gives 4.1411or 4.15 as the height.
4.141 / 4 = 1.03425

Step 3, applying the outsloping mod to the effective belt height
This is 1.034% more height than the standard 4m non-wedge shaped.
The effective height of the wedge shaped 4m belt is 3.91m of 350mm
So 1.034 * 3.91 = 4.04294m = 4.04

What if I had rounded up?
1.035 * 3.92 = 4.0572 = 4.06

All of which 'saved' only about 80 tons.

Deck Armor
Deck Armored is modeled as two parts
A 35/135/100 main armored deck : 4853 tons
and a 35mm box around the magazines : 133 tons
Which is a total of 4986 tons

To model that, the deck thickness is shown as
35 / 139.2 /100
Which weighs 4988t

Which means vertical is a 135mm deck with a 35mm splinter box over the magazines.

Like most 'all or nothing' the Forecastle and Quarterdeck sections
are set up as protective decks.

TDS
Raised to the underside of the Armor deck at 1.5m above waterline.

TDS : Bulge ||9mm mild hull||, 1m liquid ||9mm mild||, 1m void ||9mm armor||, 1m liquid || armored (2x19=38mm)||,1.5m Dam control/ flooding ||(9mm mild)||
Depth : 1.5m exterior, 3m interior to main bulkhead, 1.5m to second bulkhead. Total :6m, 57mm STS steel

There is a 35mm Box around the magazines this adds 130 tons,
boosting total deck to 4574

290t Reserve Wt

AD
622t Fire Control 1930
25t LR Radio
0t SR Radio
25t Searchlight Tower
25t Hulesmeyer device

OD
5t - Paravanes
25t +5t : Fighter/Scout floatplane + Gunpowder Cat
25t +5t : Fighter/Scout floatplane + Gunpowder Cat

HAW
38t Additional fire suppresion
38t CO2 Air conditioning

HBW
38t Extra pumps
331t turbo electric
186t torpedo nets
15t Enhanced Hydrophones

Decks
+4.35 Weather deck
+1.5 Armor Deck 125mm , top of TDS.
-1.2 3rd Deck
-2.5 bottom main belt
-3.2 2nd Deck
-5.7 1st Deck
-8.2 Engineering
-9.16 Double Bottom

Kaiser Kirk · March 17, 2024, 11:16:24 PM

Basic 1931 AA Refit.

The Parthians are unsure of the relative merits of the different AA weapons.
Typically the plan would be to have the 120 OR 90mm, and then 37 AND 23.

They could do that by removing the 90mm and replacing it with the 37 Quads
but here they decide to keep both 120 and 90
and use the intermediate AAMG - the 30mm. Which is thought able to do both the 37 and 23 mm roles,
though maybe not as optimal for each.

Vs. high flying bombers a medium artillery piece able to reach 30,000 is thought needed. The 115/120/130mm fill that.

Vs. Torpedo bombers, two bands of attack are expected

The first is barrage by 90/115/120/130 which for a long time I thought of as a curtain of shells, but is really more clusters shells exploding in line ahead of the formation, with overlapping lethal bursts. This means range is far less critical as you are saturating a line of travel.

The second is direct fire by - originally 57mm- 37mm, 30mm, 23mm

The 37 has a longer reach, but slower rate of fire. Like the OTL USN, the 30mm is viewed as a sufficient caliber to ensure destruction, and fitted with a sensitive fuse. While the 37 is mounted in Quads to compensate for a lower overall ROF, the 30 is mounted in 2-Gun mounts with the expectation the lighter weight will allow it to be trained on mobile threats like the 23mm.

The 23mm has enough shell weight and power to engage torpedo planes just before they drop the torpedo, and the GAST design gives high burst capability, though long duration engagements (which is viewed as unlikely) could be problematic.

Then there's the strafing to suppress AA ...and now dive bomber threat emerging from trials
Originally met by relying on the old Gardner cranked guns for dockside security and boarding actions, then by the 15mm GAST for fortress use - heavy bursts of fire. That has now stepped up to the 23mm GAST...or the more sophisticated 30mm.

242t : 120L43 AS -> 120L43 HALA
44t : 90L50 AA -> 90L54 HALA
15mm -> Removed
33t : Rivet on platforms for 2G 30mm AA, ammo lockers
30t : Kite Ballon facilities -> Replace with 1xFighter/Scout plane + Cat
5t : Add Paravanes
25t : Add Searchlights
25t : Add Hulesmeyer
25t : Replace LR Radio
124t : Replace FC
Total : 553t

Quote
Zemaka 'Winter Storm" BR31, Parthian Armored Cruiser laid down 1920

Displacement:
   18,474 t light; 19,516 t standard; 21,342 t normal; 22,803 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (621.03 ft / 613.52 ft) x 78.74 ft (Bulges 82.02 ft) x (29.53 / 31.11 ft)
   (189.29 m / 187.00 m) x 24.00 m (Bulges 25.00 m) x (9.00 / 9.48 m)

Armament:
8 - 10.04" / 255 mm 47.0 cal guns - 601.86lbs / 273.00kg shells, 161 per gun
     Breech loading guns in turret on barbette mounts, 1920 Model
     2 x 4-gun mounts on centreline ends, evenly spread
12 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 300 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     4 x 2-gun mounts on side ends, evenly spread
8 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Anti-air guns in deck mounts, 1929 Model
     4 x 2-gun mounts on side ends, evenly spread
      4 raised mounts
20 - 1.18" / 30.0 mm 80.0 cal guns - 0.94lbs / 0.43kg shells, 2,000 per gun
     Anti-air guns in deck mounts, 1929 Model
     8 x 2-gun mounts on sides, evenly spread
      8 raised mounts
     2 x 2-gun mounts on centreline ends, evenly spread
      2 double raised mounts
Weight of broadside 5,689 lbs / 2,581 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.87" / 200 mm   466.27 ft / 142.12 m   12.99 ft / 3.96 m
   Ends:   1.38" / 35 mm   147.21 ft / 44.87 m   12.99 ft / 3.96 m
     Main Belt covers 117 % of normal length
     Main belt does not fully cover magazines and engineering spaces
     Main Belt inclined 10.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   466.27 ft / 142.12 m   27.82 ft / 8.48 m
   Beam between torpedo bulkheads 59.06 ft / 18.00 m

- Hull Bulges:
      0.51" / 13 mm   490.81 ft / 149.60 m   22.97 ft / 7.00 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 255 mm   4.92" / 125 mm      8.27" / 210 mm
   2nd:   2.95" / 75 mm   1.38" / 35 mm      2.56" / 65 mm
   3rd:   0.31" / 8 mm     -           -
   4th:   0.31" / 8 mm     -           -

- Protected deck - single deck:
   For and Aft decks: 2.56" / 65 mm
   Forecastle: 1.38" / 35 mm Quarter deck: 2.56" / 65 mm

- Conning towers: Forward 7.87" / 200 mm, Aft 2.56" / 65 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 122,000 shp / 91,012 Kw = 31.01 kts
   Range 9,540nm at 14.00 kts
   Bunker at max displacement = 3,286 tons

Complement:
   882 - 1,147

Cost:
   £4.078 million / $16.311 million

Distribution of weights at normal displacement:
   Armament: 1,233 tons, 5.8 %
     - Guns: 1,233 tons, 5.8 %
   Armour: 5,820 tons, 27.3 %
     - Belts: 2,041 tons, 9.6 %
     - Torpedo bulkhead: 1,077 tons, 5.0 %
     - Bulges: 213 tons, 1.0 %
     - Armament: 819 tons, 3.8 %
     - Armour Deck: 1,496 tons, 7.0 %
     - Conning Towers: 173 tons, 0.8 %
   Machinery: 4,266 tons, 20.0 %
   Hull, fittings & equipment: 6,770 tons, 31.7 %
   Fuel, ammunition & stores: 2,868 tons, 13.4 %
   Miscellaneous weights: 385 tons, 1.8 %
     - Hull below water: 37 tons
     - Bulge void weights: 65 tons
     - Hull above water: 49 tons
     - On freeboard deck: 35 tons
     - Above deck: 199 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     24,295 lbs / 11,020 Kg = 48.0 x 10.0 " / 255 mm shells or 3.8 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 4.3 ft / 1.3 m
   Roll period: 16.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.51
   Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.503 / 0.510
   Length to Beam Ratio: 7.48 : 1
   'Natural speed' for length: 24.77 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 68
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   16.00 %, 28.05 ft / 8.55 m, 26.41 ft / 8.05 m
     - Forward deck:   24.00 %, 26.41 ft / 8.05 m, 26.41 ft / 8.05 m
     - Aft deck:   52.00 %, 18.21 ft / 5.55 m, 18.21 ft / 5.55 m
     - Quarter deck:   8.00 %, 18.21 ft / 5.55 m, 19.69 ft / 6.00 m
     - Average freeboard:      21.65 ft / 6.60 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 116.9 %
      - Above water (accommodation/working, high = better): 144.9 %
   Waterplane Area: 32,267 Square feet or 2,998 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 145 lbs/sq ft or 707 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.76
      - Overall: 1.00
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Zemaka - Storm
Obaska - Fall Wind
Waharka - Spring Wind
Haminka - Summer Wind

Best effort at converting Phavali seasons into seasonal winds. Probably conjugating Pahvali with either Ancient or Middle Persian. I may have created well meant gibberish.

Weaponry
The 255mm L 47 gun with the heavy shell was developed to take advantage of new artillery research.

While there had been hopes of fielding a 230mm gun, evaluation of it's penetration at
18km was not entirely satisfactory. Using 18km as a standard by which cruiser sized hulls
are expected to be visible, and so full FC be effective at some point, the desire is
to start to punch holes in cruisers at that range, though decisive battle range is expected
at 14km.

The L47 has slightly less belt armor penetration compared to an L50, but somewhat better
deck penetration. The belt penetration rapidly improves as ranges close.

Secondary
The 120mm guns allow 6 guns forward/aft and 8 guns on either beam.

Armor :
The main battery has heavier armor than the belt,
reflecting that the belt has the protective deck behind it.

The first true foray into "All or Nothing"

The Protective Deck is from 0.65m down to -1.8m

The belt rises 1.25m over the belt and descends
to 2m for 3m total.

The Belt is from 1.9m to -2.0m
A distance of 3.9, but is inclined 10deg so needs 3.96
(3.9 / cos(10) = 3.960 = 3.96.)

Giving an unarmored freeboard of 4.4m.

The 60mm deck will defeat splinters up to 360mm.

TDS
The vessel is designed for Depth of TDS, which drives the Beam.
With 17.4m across the amidships, and 3.5deep on each side, there is a large volume which
should not be flooded, minimizing list from Torpedo strikes

The 3.5m deep side protection has a 19mm STS bulkhead seperating the compartment
in two, and a 38mm (laminated 2x19mm) bulkhead backing the system.

The compartments are an outer 2m wide, and an inner 1.3m (4.3ft) wide.
The outer filled with oil fuel, the inner with air. This is expected to
minimize list if the outer is breached, as fuel and seawater will be exchanged. The
fuel is expected to disperse and broaden the concussion on the 19mm bulkhead.
That bulkhead is chosen for maximizing deformation ability and toughness.
While also being splinterproof.

The 38mm (2x19mm) provides a backup which will stop any splinters, but is also
able to deform.

The 1.3m (4.3ft) void space between it and the 19mm will allow Damage control
access for leaks, or counterflooding compartment on the far side of the vessel.

MISC :
65- Reserve wt.

AD :
124 - FC
25 - LR radio
0t - SR radio
25t - Searchlight tower
25t - Hulesmeyer Proximity Device

OD :
5t - Paravanes
25t - Scout (or Fighter) Floatplane
5t - Catapult.

HAW :
18t - CO2 Air compressor A/C
37t - Imp Fire ext.

HBW :
37t - Pumps

Decks : 2.45m for most
8.05m : Forecastle
5.55m : Weather
3.10m : Battery
+1.90: Top Main Belt
0.65m : Main - Protective Deck, Top TDS
-1.8m : Lower Edge Protective Deck, 2nd Deck
-2.00m : Bottom Main belt
-4.25 : 1st Deck
-7.20 : Engineering
-7.83 : Keel, Double bottom

Kaiser Kirk · April 06, 2024, 04:24:27 PM

Looking at my incomplete HY2 1931,
I was tracking which refits I had posted.
That leaves :
Free Refit – Pasbanendag
Free Refit – Royal Neissan XV
Paid Refit FC Royal XV
Maelstrom Class FC
Ranger Class FC
Refit FC Royal XII
Refit FC Moulek

Then there's the possibility of fresh laydowns.
Because all that work is pretty minor and still leaves 11BP

Kaiser Kirk · April 06, 2024, 04:31:06 PM

The 'Watcherbird' seaplane cruiser is completing, so might as well get the the final product up to snuff.

These ships are expected to be 1 per cruiser squadron, providing a search function, allowing the carriers to focus on fighters and/or attack. It's actually the IJN concept, which for 1930 makes sense.

Just musing, but I think our view of carrier assets would be different if the hordes of US carriers were not available in WWII, and it was just the Royal Navy carriers the IJN. Actually that could be an interesting 'what if' - a simple Anglo-Japanese Naval war, say sparked from the Sino-Japanese spilling into Hong Kong in 1938..

QuotePasbanendag "Watcher Bird", Parthian Seaplane Cruiser laid down 1930

Displacement:
   8,000 t light; 8,460 t standard; 9,690 t normal; 10,675 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (557.74 ft / 551.18 ft) x 61.22 ft x (21.85 / 23.44 ft)
   (170.00 m / 168.00 m) x 18.66 m x (6.66 / 7.14 m)

Armament:
8 - 7.09" / 180 mm 47.0 cal guns - 187.39lbs / 85.00kg shells, 165 per gun
     Breech loading guns in deck and hoist mounts, 1930 Model
     2 x 2-gun mounts on centreline, forward deck forward
      1 raised mount - superfiring
     2 x 2-gun mounts on centreline, forward deck aft
      1 raised mount - superfiring
12 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 260 per gun
     Dual purpose guns in deck and hoist mounts, 1931 Model
     6 x 2-gun mounts on sides, forward evenly spread
      2 raised mounts
16 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 900 per gun
     Anti-air guns in deck and hoist mounts, 1929 Model
     2 x 4-gun mounts on sides amidships
      2 raised mounts
     2 x 4-gun mounts on centreline ends, evenly spread
      2 double raised mounts
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
     Machine guns in deck mounts, 1929 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
Weight of broadside 2,195 lbs / 996 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   358.27 ft / 109.20 m   12.57 ft / 3.83 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length
     Main Belt inclined -15.00 degrees (positive = in)

- Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.12" / 130 mm   1.57" / 40 mm      3.94" / 100 mm
   2nd:   1.57" / 40 mm   0.98" / 25 mm      1.38" / 35 mm
   3rd:   0.59" / 15 mm     -           -
   4th:   0.12" / 3 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 2.17" / 55 mm
   Forecastle: 1.57" / 40 mm Quarter deck: 2.17" / 55 mm

- Conning towers: Forward 4.92" / 125 mm, Aft 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 65,356 shp / 48,756 Kw = 30.00 kts
   Range 8,500nm at 16.00 kts
   Bunker at max displacement = 2,214 tons

Complement:
   487 - 634

Cost:
   £3.211 million / $12.843 million

Distribution of weights at normal displacement:
   Armament: 602 tons, 6.2 %
     - Guns: 602 tons, 6.2 %
   Armour: 1,796 tons, 18.5 %
     - Belts: 730 tons, 7.5 %
     - Armament: 147 tons, 1.5 %
     - Armour Deck: 855 tons, 8.8 %
     - Conning Towers: 64 tons, 0.7 %
   Machinery: 1,980 tons, 20.4 %
   Hull, fittings & equipment: 3,076 tons, 31.7 %
   Fuel, ammunition & stores: 1,690 tons, 17.4 %
   Miscellaneous weights: 546 tons, 5.6 %
     - Hull below water: 73 tons
     - Hull void weights: 53 tons
     - Hull above water: 16 tons
     - On freeboard deck: 248 tons
     - Above deck: 156 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     11,413 lbs / 5,177 Kg = 64.1 x 7.1 " / 180 mm shells or 1.7 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 2.7 ft / 0.8 m
   Roll period: 15.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.70
   Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.460 / 0.472
   Length to Beam Ratio: 9.00 : 1
   'Natural speed' for length: 23.48 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 13.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 25.92 ft / 7.90 m, 23.29 ft / 7.10 m
     - Forward deck:   40.00 %, 23.29 ft / 7.10 m, 22.64 ft / 6.90 m
     - Aft deck:   25.00 %, 14.44 ft / 4.40 m, 14.44 ft / 4.40 m
     - Quarter deck:   15.00 %, 14.44 ft / 4.40 m, 3.28 ft / 1.00 m
     - Average freeboard:      18.99 ft / 5.79 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 88.9 %
      - Above water (accommodation/working, high = better): 167.1 %
   Waterplane Area: 21,704 Square feet or 2,016 Square metres
   Displacement factor (Displacement / loading): 117 %
   Structure weight / hull surface area: 98 lbs/sq ft or 477 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.51
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

The 1931 Basic AA Refit was done prior to Completion.

Complete with 1930 FC
Complete with 115 DP not 120AS

Pasban = Watcher
-endag = bird
winjisk - sparrow
Xrad - wisdom
ustan - ghost
wad - wind/spirit

Xursedendag = Sunbird

Intended to provide a cruiser with a decent "punch"
of fast rotating 180mm guns, but high speed and range..
while also providing a fleet scout role.

This results in guns in "A/B" and "P/Q" amidships but a aft deck and stern cleared for aircraft handling ala Tone

This is modeled by a long foredeck covering 20+40=60% of the ship,
with A/B being "Fore deck foreward", and "P/Q" being "fore deck aft"
This leaves the 40% of the ship aft - 67.2m / 202.4ft for handling aircraft.

This handling deck is a deck level lower than the forecastle deck, allowing the aft guns to fire over with only shallow elevations to clear.

The stern slopes down to make a ramp, allowing planes to be brought on board more readily.

Main armor belt is outsloped 15 degrees
3.7 / cos (15) =3.8305= 3.83

Forecastle/Quarterdeck are protectivedecks

Misc
75t - Reserve weight.

AD
61 - FC 1930
25 - LR radio
0t - SR Radio
25t - Hulesmeyer prox detection
35t - Searchlight tower (NF) & ATC Observation station
10t - SR Radio, dedicated AC

OD
On Forecastle deck : 78
41t - 10% tonnage - power assist for Main Battery
5t Paravanes
32t 2TT4 21" 4t

On aft deck : 170t
10t - 2x Gunpowder Catapults
50t - 2x Fighter Float
100t - 4x Scout Float (normal, able to fit Ftr)
(cranes and nets for recovery part of floatplane cost)
10t - rail system.

HAW
8t - CO2 A/C
8t- Enhanced Fire Suppresion.

HBW
8t - Enhanced Pumps
15t - Enhanced Hydrophones
50t - Additional AvGas in double tank (5t +45t gas)

Decks
+6.9
+4.4
+1.9 Main Armor Deck, Top Main Belt.
-0.60 2nd Deck
-1.8 Bottom Main Belt
-3.10 1st Deck
-5.59 Double Bottom, Engineering
-6.66 Keel

Kaiser Kirk · April 06, 2024, 04:56:56 PM

..and that was one I nearly had my time out 'hey I thought I posted' issue.

Kaiser Kirk · April 06, 2024, 05:01:45 PM

The Royal Nissean XIV is the recent variant on the Royal Nissean XIIA class.
There are 4 in commission and 2 completing. With the 6 of the IIA type, that brings me to 12, or 3 full squadrons.
The Basic Refit will be paid for the 4 in commission and be the free refit for the 2 completing.

QuoteRoyal Nissean XIV, Parthian Cruiser laid down 1927

Displacement:
   7,994 t light; 8,557 t standard; 9,499 t normal; 10,253 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (523.95 ft / 518.37 ft) x 57.94 ft x (22.64 / 23.97 ft)
   (159.70 m / 158.00 m) x 17.66 m x (6.90 / 7.31 m)

Armament:
12 - 7.09" / 180 mm 47.0 cal guns - 187.39lbs / 85.00kg shells, 180 per gun
     Breech loading guns in deck and hoist mounts, 1927 Model
     6 x 2-gun mounts on centreline, evenly spread
      3 raised mounts
12 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 160 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     6 x 2-gun mounts on side ends, majority forward
8 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 400 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     4 x 2-gun mounts on side ends, evenly spread
      4 raised mounts
24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 1,600 per gun
     Anti-air guns in deck and hoist mounts, 1929 Model
     4 x 2-gun mounts on sides, evenly spread
      4 raised mounts
     2 x 2-gun mounts on sides forward
      2 double raised mounts
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 2,500 per gun
     Machine guns in deck mounts, 1927 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
Weight of broadside 3,152 lbs / 1,430 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.92" / 125 mm   352.49 ft / 107.44 m   10.40 ft / 3.17 m
   Ends:   Unarmoured
     Main Belt covers 105 % of normal length
     Main belt does not fully cover magazines and engineering spaces
     Main Belt inclined -12.00 degrees (positive = in)

- Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   1.97" / 50 mm      5.12" / 130 mm
   2nd:   0.59" / 15 mm   0.31" / 8 mm      0.31" / 8 mm
   3rd:   0.59" / 15 mm     -           -
   4th:   0.31" / 8 mm   0.31" / 8 mm      0.31" / 8 mm
   5th:   0.31" / 8 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 1.97" / 50 mm
   Forecastle: 0.98" / 25 mm Quarter deck: 1.97" / 50 mm

- Conning towers: Forward 4.92" / 125 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 67,245 shp / 50,165 Kw = 30.00 kts
   Range 8,600nm at 14.00 kts
   Bunker at max displacement = 1,696 tons

Complement:
   480 - 625

Cost:
   £3.215 million / $12.858 million

Distribution of weights at normal displacement:
   Armament: 877 tons, 9.2 %
     - Guns: 877 tons, 9.2 %
   Armour: 1,688 tons, 17.8 %
     - Belts: 740 tons, 7.8 %
     - Armament: 205 tons, 2.2 %
     - Armour Deck: 695 tons, 7.3 %
     - Conning Tower: 48 tons, 0.5 %
   Machinery: 2,123 tons, 22.3 %
   Hull, fittings & equipment: 2,836 tons, 29.9 %
   Fuel, ammunition & stores: 1,505 tons, 15.8 %
   Miscellaneous weights: 470 tons, 4.9 %
     - Hull below water: 40 tons
     - Hull void weights: 70 tons
     - Hull above water: 33 tons
     - On freeboard deck: 154 tons
     - Above deck: 173 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,272 lbs / 3,752 Kg = 46.5 x 7.1 " / 180 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 15.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.96
   Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.489 / 0.498
   Length to Beam Ratio: 8.95 : 1
   'Natural speed' for length: 22.77 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 12.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 26.25 ft / 8.00 m, 23.79 ft / 7.25 m
     - Forward deck:   33.00 %, 23.79 ft / 7.25 m, 21.33 ft / 6.50 m
     - Aft deck:   35.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
     - Quarter deck:   12.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
     - Average freeboard:      18.72 ft / 5.71 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 104.6 %
      - Above water (accommodation/working, high = better): 140.5 %
   Waterplane Area: 19,813 Square feet or 1,841 Square metres
   Displacement factor (Displacement / loading): 102 %
   Structure weight / hull surface area: 102 lbs/sq ft or 496 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.63
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

1931 Basic AA Refits

187t 120L43AS 25kg -> 120L43 HALA 25kg
75t 90L50 11kg -> 90L54 HALA 11kg
75t 2G 57mm AA -> 4G 37mm AA
15.4 15mm AAMG -> 23mm AAMG
88t Replace FC 1930
5t- Add paravanes
------
446

MB Height : 1.6 AWL to -1.5BWL = 3.
3.21cos(12) = 3.169 =3.17

70t - Reserve

AD
86t - Fire Control 1930
25t - LR Radio
10t - SR Radio -dedicated AC command center
0t - SR Radio
25t - Searchlight tower (NF)
25t - Hulesmeyer

OD
5t - Paravanes
18t - 2TT3 21" 3t on stern
55t - 2x 20+5 - Fighter Float + Gunpwdr CAT
76t - 10% rotating wt Power Assist for 180L47

HAW
8t - CO2 Compresser A/C
25t - Enhanced Fire Ext.

HBW
15t - Enhanced Hydrophones
25t - Extra Pumps.

Decks
+6.5 Forecastle Deck
+4.1 Weather Deck
+1.6 Battery Deck Top belt, Armored Deck
-1.00 Deck
-1.5 Bottom main belt
-3.50
-5.80 Engineering
-6.9 Keel, double bottom

Kaiser Kirk · April 06, 2024, 05:20:44 PM

The Parthian predreadnaughts are reaching the end of their time with the fleet.
The Turtle class is used for training, while the Rohk and Simurgh
act in support of the Battleships of the territorial fleets.

The 300mm armed Turtle and Rohk can probably kill any armored cruiser, and could be dangerous in night combat, but the Simurgh with the new 333L43 guns is actually dangerous
to most ships out there.

So the first two classes are not prioritized for AA/FC refits, but the Simurgh is.

QuoteSimurgh Ref24, BR31, Parthian Battleship laid down 1904 (Engine 1924)

Displacement:
18,468 t light; 19,579 t standard; 20,924 t normal; 22,001 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(493.77 ft / 487.20 ft) x 86.94 ft (Bulges 93.50 ft) x (28.71 / 29.97 ft)
(150.50 m / 148.50 m) x 26.50 m (Bulges 28.50 m) x (8.75 / 9.13 m)

Armament:
4 - 13.11" / 333 mm 43.0 cal guns - 1,311.75lbs / 595.00kg shells, 96 per gun
Breech loading guns in turret on barbette mounts, 1917 Model
2 x Twin mounts on centreline ends, evenly spread
16 - 7.09" / 180 mm 43.0 cal guns - 187.39lbs / 85.00kg shells, 197 per gun
Breech loading guns in turret on barbette mounts, 1913 Model
2 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
6 x Twin mounts on sides, evenly spread
2 raised mounts
8 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 600 per gun
Anti-air guns in deck and hoist mounts, 1929 Model
4 x 2-gun mounts on side ends, evenly spread
4 double raised mounts
8 - 1.46" / 37.0 mm 70.0 cal guns - 1.73lbs / 0.79kg shells, 1,100 per gun
Anti-air guns in deck and hoist mounts, 1929 Model
2 x 4-gun mounts on centreline ends, evenly spread
2 double raised mounts
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.43lbs / 0.20kg shells, 3,000 per gun
Machine guns in deck mounts, 1929 Model
8 x Single mounts on sides, evenly spread
Weight of broadside 8,460 lbs / 3,837 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.2" / 360 mm 316.67 ft / 96.52 m 9.84 ft / 3.00 m
Ends: 1.38" / 35 mm 170.51 ft / 51.97 m 8.20 ft / 2.50 m
Upper: 5.31" / 135 mm 316.67 ft / 96.52 m 10.99 ft / 3.35 m
Main Belt covers 100 % of normal length

- Hull Bulges:
0.35" / 9 mm 323.23 ft / 98.52 m 24.44 ft / 7.45 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.4" / 365 mm 6.50" / 165 mm 13.6" / 345 mm
2nd: 5.91" / 150 mm 1.97" / 50 mm 5.31" / 135 mm
3rd: 1.38" / 35 mm 0.98" / 25 mm 0.98" / 25 mm
4th: 0.31" / 8 mm - -

- Protected deck - multiple decks:
For and Aft decks: 6.10" / 155 mm
Forecastle: 1.57" / 40 mm Quarter deck: 3.15" / 80 mm

- Conning towers: Forward 14.17" / 360 mm, Aft 2.95" / 75 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 50,873 shp / 37,951 Kw = 24.00 kts
Range 7,200nm at 14.00 kts
Bunker at max displacement = 2,422 tons

Complement:
869 - 1,130

Cost:
£1.550 million / $6.200 million

Distribution of weights at normal displacement:
Armament: 1,405 tons, 6.7 %
- Guns: 1,405 tons, 6.7 %
Armour: 7,880 tons, 37.7 %
- Belts: 2,847 tons, 13.6 %
- Bulges: 104 tons, 0.5 %
- Armament: 1,636 tons, 7.8 %
- Armour Deck: 3,013 tons, 14.4 %
- Conning Towers: 280 tons, 1.3 %
Machinery: 1,676 tons, 8.0 %
Hull, fittings & equipment: 6,444 tons, 30.8 %
Fuel, ammunition & stores: 2,457 tons, 11.7 %
Miscellaneous weights: 1,063 tons, 5.1 %
- Hull below water: 593 tons
- Bulge void weights: 150 tons
- Hull above water: 44 tons
- On freeboard deck: 50 tons
- Above deck: 226 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
32,264 lbs / 14,635 Kg = 28.6 x 13.1 " / 333 mm shells or 4.2 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 6.1 ft / 1.9 m
Roll period: 15.9 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.35
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.560 / 0.564
Length to Beam Ratio: 5.21 : 1
'Natural speed' for length: 22.07 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -15.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 24.28 ft / 7.40 m, 21.98 ft / 6.70 m
- Forward deck: 35.00 %, 21.98 ft / 6.70 m, 19.69 ft / 6.00 m
- Aft deck: 30.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Quarter deck: 15.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Average freeboard: 17.04 ft / 5.19 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 60.4 %
- Above water (accommodation/working, high = better): 108.0 %
Waterplane Area: 29,840 Square feet or 2,772 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 165 lbs/sq ft or 806 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.13
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Adequate accommodation and workspace room

BR31

Upper belt : The main belt rises 0.5m above the main protective deck. The remaining distance to freeboard is covered by the upperbelt. 54% of the upper belt is 2 decks (5m) high, and 46% is 1 deck (2.5m) high. This means 54% is 4.5m high, and 46% is 2m high, for an average of 3.35m high.

+6.0 Forecastle Deck, 30mm armor deck, top of 54% of upper belt.
+3.5 Weather Deck, 30mm armor deck, top of 46% of upper belt
+1.5 Top of main belt
+1.0 3rd Deck, Crown of Protective Deck 60mm
-1.5 3rd Deck, Bottom of main belt, lower edge of 60mm protective deck
-3.00 2nd Deck
-5.50 1st Deck, pierced by turbines
-8.08 Engineering Deck

Range is equivalent of 21 days at 10kts with a 10% reserve

Refurbished in 1924,
the Simurgh is considered a 2nd rate battleship.
The 4-gun main battery is a limitation that can not be completely overcome,
but with the 333mm guns and thick armor, it is expected to be capable
of engaging all but the newest dreadnaughts with a reasonable expectation of succeeding. Like the Rohk, it is faster than the Byzantine battleline and able to oppose their pocket battleships.

Reserve : 150

AD
141t Fire Control 1930
25t LR Radio
10t SR Radio dedicated aircraft
25t Hulesmeyer
25t Searchlight Tower (NF)

OD
5t Paravanes
5t Gunpowder Cat tranverse mounting
40t 2x Scout Floatplane

HAW
25t Enhanced Fire Suppression
19t CO2 compressor AC

HBW
25t Enhanced Pumps
149t Torpedo Nets
419t Turboelectric Generator

Upper belt : The main belt rises 0.5m above the main protective deck. The remaining distance to freeboard is covered by the upperbelt. 54% of the upper belt is 2 decks (5m) high, and 46% is 1 deck (2.5m) high. This means 54% is 4.5m high, and 46% is 2m high, for an average of 3.35m high.

+6.0 Forecastle Deck, 30mm armor deck, top of 54% of upper belt.
+3.5 Weather Deck, 30mm armor deck, top of 46% of upper belt
+1.5 Top of main belt
+1.0 3rd Deck, Crown of Protective Deck 60mm
-1.5 3rd Deck, Bottom of main belt, lower edge of 60mm protective deck
-3.00 2nd Deck
-5.50 1st Deck, pierced by turbines
-8.08 Engineering Deck

Range is equivalent of 21 days at 10kts with a 10% reserve

Kaiser Kirk · April 06, 2024, 05:52:30 PM

The Royal Nissean IIA, Maelstrom and Ranger classes received their AA refit in 1929, so they only need
the fire control updated to 1930. While they can not fire that distance, this should capture some of the early AA controllers.

The Moulek class though was not updated in 1929, and so needs the whole kit and kaboodle.

QuoteMoulek, Pouseki BR21, Parthian Cruiser laid down 1921

Displacement:
   5,990 t light; 6,347 t standard; 7,346 t normal; 8,145 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (523.33 ft / 516.73 ft) x 50.03 ft x (20.51 / 22.15 ft)
   (159.51 m / 157.50 m) x 15.25 m x (6.25 / 6.75 m)

Armament:
8 - 7.09" / 180 mm 43.0 cal guns - 187.39lbs / 85.00kg shells, 200 per gun
     Breech loading guns in deck and hoist mounts, 1921 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     4 x Single mounts on side ends, evenly spread
4 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 400 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.43lbs / 0.20kg shells, 2,600 per gun
     Anti-air guns in deck mounts, 1929 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
8 - 1.46" / 37.0 mm 70.0 cal guns - 1.73lbs / 0.79kg shells, 1,600 per gun
     Anti-air guns in deck and hoist mounts, 1921 Model
     2 x 2 row quad mounts on centreline ends, evenly spread
      2 double raised mounts
Weight of broadside 1,617 lbs / 733 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.54" / 90 mm   356.56 ft / 108.68 m   11.48 ft / 3.50 m
   Ends:   Unarmoured
     Main Belt covers 106 % of normal length

- Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.56" / 65 mm   1.77" / 45 mm      1.77" / 45 mm
   2nd:   0.31" / 8 mm     -           -
   4th:   0.31" / 8 mm     -           -

- Protected deck - single deck:
   For and Aft decks: 1.77" / 45 mm
   Forecastle: 1.38" / 35 mm Quarter deck: 1.77" / 45 mm

- Conning towers: Forward 3.54" / 90 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 56,227 shp / 41,945 Kw = 30.00 kts
   Range 10,024nm at 14.00 kts
   Bunker at max displacement = 1,798 tons

Complement:
   396 - 515

Cost:
   £1.581 million / $6.325 million

Distribution of weights at normal displacement:
   Armament: 395 tons, 5.4 %
     - Guns: 395 tons, 5.4 %
   Armour: 1,302 tons, 17.7 %
     - Belts: 586 tons, 8.0 %
     - Armament: 137 tons, 1.9 %
     - Armour Deck: 551 tons, 7.5 %
     - Conning Tower: 29 tons, 0.4 %
   Machinery: 1,936 tons, 26.4 %
   Hull, fittings & equipment: 2,148 tons, 29.2 %
   Fuel, ammunition & stores: 1,356 tons, 18.5 %
   Miscellaneous weights: 209 tons, 2.8 %
     - Hull below water: 15 tons
     - Hull void weights: 20 tons
     - Hull above water: 6 tons
     - On freeboard deck: 53 tons
     - Above deck: 115 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,513 lbs / 2,954 Kg = 36.6 x 7.1 " / 180 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 2.3 ft / 0.7 m
   Roll period: 14.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.67
   Seaboat quality (Average = 1.00): 1.08

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.485 / 0.498
   Length to Beam Ratio: 10.33 : 1
   'Natural speed' for length: 22.73 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 46
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 24.61 ft / 7.50 m, 21.33 ft / 6.50 m
     - Forward deck:   23.00 %, 21.33 ft / 6.50 m, 21.33 ft / 6.50 m
     - Aft deck:   46.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
     - Quarter deck:   11.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
     - Average freeboard:      16.91 ft / 5.16 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 105.1 %
      - Above water (accommodation/working, high = better): 129.6 %
   Waterplane Area: 16,994 Square feet or 1,579 Square metres
   Displacement factor (Displacement / loading): 109 %
   Structure weight / hull surface area: 82 lbs/sq ft or 398 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.86
      - Longitudinal: 1.31
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

BR31

37t- Replace 4x 90L50 with 4x 90L54
21.1t- Replace 2x 90L50 with 4G 37mm
12.9t- Replace 15mm with 23mm
48t- replace 3t Torps with 4t
25t - add Hulesmeyer
40t- replace fire control
---
184t

The Moulek and Pouseki are local names for the Caspian Horse,
an ancient horse breed depicted from the time of Darius.

The rotating weight for the main battery is 59.875 tons each.
This is betwen the 45 and 70t in the Ship Design guidelines.
Likewise the 85kg shell is betwen the 60 and 95kg marks for handloading.

The 90mm AA are mounted high.

Misc. Weight :
20t: Construction Resv

AD
40t : FC
25t : LR Radio
0t : SR Radio
25t : Searchlight tower (NF)
25t : Hulesmeyer proximity detector

OD
48t : 4T3 21" TT 4t
5t : Paravanes

HAW
6t : CO2 Compressor AC

HBW
15t : Enhanced Hydrophones

Decks :

+6.50 : Forecastle deck
+4.00 : Battery deck/ weather deck
+2.00 : top armor belt
+1.50 : Crown of protective deck
-1.00 : 1st deck, lower edge protective deck.
-1.50 : bottom armor belt
-4.50 : Engineering
-5.32 : Keel, double bottom

Kaiser Kirk · April 14, 2024, 01:00:50 AM

The Tiamat class is due for a refurbishment.

Originally this was planned years ago, and the 390L46 designed as a 2G would fit where the Triple 365L40 is. Since then, a new 390L46 was researched with the 1925 technology and DP (HALA) guns introduced. The new gun has roughly 18% more belt penetration, with 1/3 more deck pen at long ranges.

Converting to Diesel-Electric was considered, but the concept of mixing the fuel used by the main fleet was not viewed well.

The Tiamatlike the rebuilt USS Maryland will have deck DP and casement DP.
That triggers a warning about Casement DP, and I only expect them to be useful vs. torpedo bombers. The Maryland's casements actually splashed at least one. Fellow the next town over wrote a book about his time on the ship.

The cost is higher (as always) than I'd like.
Paying or it will put a dent in my budgets.
Time is 16.99 or 17 months !

Right now without the Tiamats the Home Fleet only has 2x Vazyra, 2x Kalifern - 72 guns

if I add the Expeditionary Fleet, I add 2x Stormbringer & 2x Wirozag - 36 guns

So I think I need these 4 hulls & 40 guns
to fill the line if the Expeditionary fleet is deployed to reinforce the Pacific or Atlantic (30 x 333L43 each)

I think the rebuilt ship is a tough opponent that can square off against most out there.
The Tiamats will have an IZ of 12km to 27km to its' own guns.

1932 refurbishment :

Cost
$5.799

A) Armanent & Machinery
Armanent : 3883
Engines : 949
Subtotal : 4,832t

4.832 BP
9.664 $

B) Armor & Funct Misc Wt.
1320t - weapon armor
1063+112+119+2+13+81+57+123+1349+162 = 2981t armor
1119t : Func Misc Wt.
----
5420t

5.42 BP
$5.42

C) Hull Fittings & Equipment
Hull - refurbish hull, Reshape bow :
28995/5000 = $5.799

D) Fuel Ammo & Stored
Magazines : 1932
Bunkers : 2410
-----
4342/2000 = $2.171

SubTotals :
A) $9.664, 4.832 BP
B) $5.42, 5.42 BP
C) $5.799
D) $2.171
----------
15.09 BP
23.06 $

QuoteTiamat, Parthian Gilgamesh laid down 1909 (Engine 1932)

Displacement:
29,031 t light; 31,622 t standard; 32,961 t normal; 34,032 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(557.74 ft / 551.18 ft) x 101.71 ft (Bulges 111.55 ft) x (31.17 / 32.08 ft)
(170.00 m / 168.00 m) x 31.00 m (Bulges 34.00 m) x (9.50 / 9.78 m)

Armament:
10 - 15.35" / 390 mm 46.0 cal guns - 1,984.16lbs / 900.00kg shells, 118 per gun
Breech loading guns in turret on barbette mounts, 1929 Model
5 x 2-gun mounts on centreline, evenly spread
2 raised mounts
16 - 5.12" / 130 mm 47.0 cal guns - 85.98lbs / 39.00kg shells, 393 per gun
Dual purpose guns in deck and hoist mounts, 1929 Model
8 x 2-gun mounts on sides, evenly spread
12 - 5.12" / 130 mm 47.0 cal guns - 85.98lbs / 39.00kg shells, 393 per gun
Dual purpose guns in casemate mounts, 1929 Model
12 x Single mounts on sides, evenly spread
12 hull mounts in casemates- Limited use in heavy seas
32 - 1.46" / 37.0 mm 54.0 cal guns - 1.65lbs / 0.75kg shells, 2,600 per gun
Anti-air guns in deck and hoist mounts, 1929 Model
6 x 2 row quad mounts on side ends, majority forward
6 raised mounts
2 x 2 row quad mounts on centreline ends, evenly spread
2 double raised mounts
24 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
Breech loading guns in deck mounts, 1929 Model
12 x Twin mounts on sides, evenly spread
12 double raised mounts
Weight of broadside 22,313 lbs / 10,121 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 355 mm 358.27 ft / 109.20 m 9.84 ft / 3.00 m
Ends: 1.38" / 35 mm 192.88 ft / 58.79 m 8.20 ft / 2.50 m
Upper: 4.72" / 120 mm 325.46 ft / 99.20 m 11.32 ft / 3.45 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.81" / 46 mm 358.27 ft / 109.20 m 29.13 ft / 8.88 m
Beam between torpedo bulkheads 78.74 ft / 24.00 m

- Hull Bulges:
0.35" / 9 mm 358.27 ft / 109.20 m 26.25 ft / 8.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.7" / 400 mm 7.09" / 180 mm 13.8" / 350 mm
2nd: 2.56" / 65 mm 1.57" / 40 mm 1.57" / 40 mm
3rd: 4.72" / 120 mm 0.98" / 25 mm 0.98" / 25 mm
4th: 0.31" / 8 mm - -
5th: 0.31" / 8 mm - -

- Protected deck - multiple decks:
For and Aft decks: 5.51" / 140 mm
Forecastle: 1.18" / 30 mm Quarter deck: 3.15" / 80 mm

- Conning towers: Forward 13.98" / 355 mm, Aft 2.56" / 65 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 32,165 shp / 23,995 Kw = 20.00 kts
Range 5,600nm at 14.00 kts
Bunker at max displacement = 2,410 tons

Complement:
1,223 - 1,590

Cost:
£3.090 million / $12.360 million

Distribution of weights at normal displacement:
Armament: 4,360 tons, 13.2 %
- Guns: 4,360 tons, 13.2 %
Armour: 11,689 tons, 35.5 %
- Belts: 3,089 tons, 9.4 %
- Torpedo bulkhead: 699 tons, 2.1 %
- Bulges: 123 tons, 0.4 %
- Armament: 3,659 tons, 11.1 %
- Armour Deck: 3,751 tons, 11.4 %
- Conning Towers: 366 tons, 1.1 %
Machinery: 949 tons, 2.9 %
Hull, fittings & equipment: 10,813 tons, 32.8 %
Fuel, ammunition & stores: 3,930 tons, 11.9 %
Miscellaneous weights: 1,219 tons, 3.7 %
- Hull below water: 465 tons
- Bulge void weights: 100 tons
- Hull above water: 58 tons
- On freeboard deck: 75 tons
- Above deck: 521 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,644 lbs / 19,797 Kg = 24.1 x 15.4 " / 390 mm shells or 8.0 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 6.9 ft / 2.1 m
Roll period: 17.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.66
Seaboat quality (Average = 1.00): 1.39

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.602 / 0.604
Length to Beam Ratio: 4.94 : 1
'Natural speed' for length: 23.48 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 11.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 25.92 ft / 7.90 m, 23.79 ft / 7.25 m
- Forward deck: 35.00 %, 23.79 ft / 7.25 m, 21.33 ft / 6.50 m
- Aft deck: 30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 15.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Average freeboard: 18.73 ft / 5.71 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 86.5 %
- Above water (accommodation/working, high = better): 116.4 %
Waterplane Area: 41,077 Square feet or 3,816 Square metres
Displacement factor (Displacement / loading): 99 %
Structure weight / hull surface area: 225 lbs/sq ft or 1,100 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.90
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Warning: Wrong mount for dual purpose gun - 3rd Battery

Refurbishment 1932

Designed Pregame, and laid down in 1909.
Pregame, we were not supposed to know what others were building.
Looking to History, the HMS Orion, first of the 13.5" were built in this time period, and orginally the 345L45 was to be the gun for this ship. Desirign to 'Beat' Agincourt for # barrels, instead of 5T2, they were 5T3. Late in the process, I decided to adopt the 365mm gun for more power, and the combination made them large ships for the day.

Completed in 1912, they were contenders for the most powerful dreadnaughts for a time. That time has long past, and while still formidible, they are worn down and not to current standards.

The original 390L46 was developed as a 2G version would fit in the barbettes of the Triple 365L40.

The new 390mm gun, developed with the 1925 artillery tech, fires a heavier shell, gaining ~10mm penetration over the earlier 390mm.

This replaces the 165mm deck and casements with 130mm firing the new heavy 39kg shell.
The 130mm was originally chosen as 2G would fit 1G 165mm mountings, while the 39kg was chosen as the heaviest practicle single-piece round.

The 130mm deck "DP" is expected to allow engagement against surface threats and aerial threats from high altitude to dive bombers to torpedo bombers.

The 130mm casements are rated "DP" to indicate the are equipped for engaging torpedo bombers as well.

Between the deck and casement 130s,
up to 14x 130mm can bear on broadside.

Base Cost : 28,995
Original Engines Turbines : 1489
Original Bunkers - Mixed : 2862
Original Main mag : 1303
Main gun+mounts : 1052+2854 = 3,906

New main Guns + Mounts : 1058+2775 = 3,883
New Main mag -118rds : 1303

Total New Guns, Mounts : 4360
New Engines : 949

The original vessel has turbines, so Turbo-Electric is not required,
but the extra manueverability, subdivision, and reserves of electric power
are viewed as useful.

Range : 6440nm

Total new weapon Armor :1063+112+119+2+13 = 1320
Replace End builts with 35mm : 81t
Replace Aft Con with 65mm : 57t
Replace bulges with thinner skin : 123t
(Note : 9mm was used by Germans to avoid shelll being turned into splinters, so I use it for Parthia).

Armor Lamination :
Forecastle : 0mm : 0g
Upper Deck : 0mm : 0t
Citadel Main deck : +55mm : 1349t
Quarter Deck : +45mm :162t

Total Vertical :
upper : 30
Main : 65 + (55* 0.8) = 109
Cumulatve : 30/2 + 109 = 124

Total Waterline :
Main : 355
Deck : ((65+ (55*.8))*1.5)/2 = 81.75
TDS : 46 /2 = 23
Total : 459.75

IZ own guns :
12km - 27km

Hull- refurbish hull, Reshape bow : 12896/5000

Non-Functional Misc Wt : N/A
Bunker : 2410t

Cost
$5.799

A) Armanent & Machinery
Armanent : 3883
Engines : 949
Subtotal : 4,832t

4.832 BP
9.664 $

B) Armor & Funct Misc Wt.
1320t - weapon armor
1063+112+119+2+13+81+57+123+1349+162 = 2981t armor
1119t : Func Misc Wt.
----
5420t

5.42 BP
$5.42

C) Hull Fittings & Equipment
Hull - refurbish hull, Reshape bow :
28995/5000 = $5.799

D) Fuel Ammo & Stored
Magazines : 1932
Bunkers : 2410
-----
4342/2000 = $2.171

SubTotals :
A) $9.664, 4.832 BP
B) $5.42, 5.42 BP
C) $5.799
D) $2.171
----------
15.09 BP
23.06 $

New Misc Wt :
100t - Reserve

AD
436t - FC 1918
25t - LR radio
10t - SR Radio - AC control
0t - SR radio
25t - Hulesmeyer Proximity Detector
25t - Searchlight tower (NF)

OD
5t - Paravanes
50t - 2 Floatplanes (1x Ftr, 1x Scout)
10t - Hanger in aft superstructure
10t - 2x Gunpowder CAT- launching port/starboard above Y.

HAW
29t - CO2 Compressor AC
29t - Extra Fire Ext

HBW
168t - Torpedo Nets
29t - Extra Pumps
30t - 1000kw Aux Diesel
238 - Turbogenerators

Decks : First two are 2.44m, but engineering spaces carry through both, the rest are 2.5m.
+6.5 forecastle deck.
+4.0 top of upper belt., armored weather deck 30mm
+1.5 top of main belt
+1m 4th deck , Crown of protective deck
-1.5 3rd Deck, Bottom of main belt, bottom of protective deck edge, deck x
-4m 2nd Deck.
-6.44m 1st Deck, pierced by Turbines amidships

Kaiser Kirk · April 14, 2024, 04:36:19 PM

The end of 1931 saw the completion of the last of a dozen 12x180 Royal Nissean series cruisers, to form 3 full squadrons, with the Pasbanendag seaplane cruisers being added to each squadron to bolster their fair-weather reconnaissance capability....and allow the final scrapping of the antiquated Mus-Sag converted torpedo-boat carriers.

The new cruiser series being considered is the Pouseki.

While it fields a smaller bore gun - the 165mm than the typical 180mm,
the shell is nearly the same weight (80kg vs 85kg) and is at a higher velocity, giving better belt penetration. Deck penetration drops, but even the 180 does not have great deck penetration, but is thought fairly similar to the Byzantine 191mm in performance.

The power assisted 165mm is also expected to be faster firing than the 180s, with even +1rpm being a benefit.

In the end this is a concept cruiser series.

The concept is that the ships will surge past the expected enemy fleet position, preferably upwind, hook around and search backwards at daylight, seeking the 'support' vessels - carriers especially,
but also the stores ships, oilers, etc.

The key here is that most ships cruise at 12-15 knots, so if you have sufficient starting overtake speed, you can catch them even if they are faster at top speed.

They can be thwarted by guard ships, or a number of other means, but the Parthians feel that may take more resources than it costs the Parthians, while the Pousekis can also be used in other ways.

Overtake
Conceptually, if steaming at 22knots cruise, and meeting a vessel steaming at 14knots cruise, there would be a +8 knot advantage.

Assuming the ship traveling 14knots was steaming directly away, and immediately went to flank speed when the range was 21km and the mast tops were visible, but not the hull.

A carrier turning to launch, or a ship delaying flank speed, or if the Parthians are charging towards a spot, and they close faster. The same math works for them escaping as well.

Assuming both ships gained 1 knot per 2 minute turn, (aka non-Destroyers), it would take 38 minutes for the 14knot to hit 33knots (if they can) and slowly pull away.

In that time, the Pouseki would have closed 4.7nm or
7.425km, down to 13.5km. At that range the 165mm can cause a fair amount of damage. With A, B and S1,2,3 &4 bearing, 8 guns firing.

Per our guidelines, under 16.5km the shell splashes can be self-spotted, that is also about the range they will penetrate 100mm belts - and in a stern chase they may have a nearly 90degree angle on the transverse armored bulkheads - which SS calculates as the same thickness as the belts.

A ship moving 34knots would have a 2 knot advantage, and be able to pull away slowly, but would take an hour to reach 17km, and 2 hours to reach 20km. During which time a hail of 165mm hits may adversely effect performance. AP or HE, depending on target, should do a number.

QuotePouseki XX, Parthian Cruiser laid down 1932

Displacement:
8,000 t light; 8,532 t standard; 9,880 t normal; 10,959 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(524.93 ft / 518.37 ft) x 54.66 ft x (26.25 / 28.31 ft)
(160.00 m / 158.00 m) x 16.66 m x (8.00 / 8.63 m)

Armament:
10 - 6.50" / 165 mm 55.0 cal guns - 176.37lbs / 80.00kg shells, 270 per gun
Quick firing guns in deck and hoist mounts, 1932 Model
3 x 2-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
4 x Single mounts on sides, forward deck aft
2 raised mounts - superfiring
8 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 400 per gun
Anti-air guns in deck and hoist mounts, 1929 Model
2 x 2-gun mounts on sides amidships
2 raised mounts
2 x 2-gun mounts on centreline ends, evenly spread
2 double raised mounts
16 - 1.46" / 37.0 mm 90.0 cal guns - 1.79lbs / 0.81kg shells, 900 per gun
Anti-air guns in deck and hoist mounts, 1929 Model
4 x 4-gun mounts on side ends, evenly spread
4 raised mounts
16 - 0.91" / 23.0 mm 120.0 cal guns - 0.44lbs / 0.20kg shells, 3,000 per gun
Breech loading guns in deck mounts, 1929 Model
8 x Twin mounts on sides, evenly spread
8 double raised mounts
Weight of broadside 1,993 lbs / 904 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 373.23 ft / 113.76 m 10.86 ft / 3.31 m
Ends: 1.38" / 35 mm 145.11 ft / 44.23 m 10.86 ft / 3.31 m
Main Belt covers 111 % of normal length
Main Belt inclined -12.00 degrees (positive = in)

- Hull void:
0.00" / 0 mm 0.00 ft / 0.00 m 0.00 ft / 0.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.56" / 65 mm 1.57" / 40 mm 1.97" / 50 mm
2nd: 0.59" / 15 mm - 0.31" / 8 mm
3rd: 0.31" / 8 mm - 0.31" / 8 mm
4th: 0.31" / 8 mm - -

- Armoured deck - single deck:
For and Aft decks: 1.57" / 40 mm
Forecastle: 1.38" / 35 mm Quarter deck: 1.57" / 40 mm

- Conning towers: Forward 5.91" / 150 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 88,387 shp / 65,937 Kw = 32.00 kts
Range 4,184nm at 22.00 kts
Bunker at max displacement = 2,427 tons

Complement:
495 - 644

Cost:
£3.853 million / $15.413 million

Distribution of weights at normal displacement:
Armament: 569 tons, 5.8 %
- Guns: 569 tons, 5.8 %
Armour: 1,569 tons, 15.9 %
- Belts: 855 tons, 8.7 %
- Armament: 122 tons, 1.2 %
- Armour Deck: 533 tons, 5.4 %
- Conning Tower: 59 tons, 0.6 %
Machinery: 2,609 tons, 26.4 %
Hull, fittings & equipment: 2,757 tons, 27.9 %
Fuel, ammunition & stores: 1,880 tons, 19.0 %
Miscellaneous weights: 497 tons, 5.0 %
- Hull below water: 29 tons
- Hull void weights: 135 tons
- Hull above water: 16 tons
- On freeboard deck: 175 tons
- Above deck: 142 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,912 lbs / 3,589 Kg = 57.7 x 6.5 " / 165 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 2.3 ft / 0.7 m
Roll period: 15.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.74
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.465 / 0.478
Length to Beam Ratio: 9.48 : 1
'Natural speed' for length: 22.77 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 18.00 %, 26.25 ft / 8.00 m, 23.79 ft / 7.25 m
- Forward deck: 41.00 %, 23.79 ft / 7.25 m, 21.33 ft / 6.50 m
- Aft deck: 31.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 10.00 %, 13.12 ft / 4.00 m, 14.11 ft / 4.30 m
- Average freeboard: 19.14 ft / 5.83 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 107.1 %
- Above water (accommodation/working, high = better): 130.2 %
Waterplane Area: 18,302 Square feet or 1,700 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 92 lbs/sq ft or 447 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.82
- Longitudinal: 1.87
- Overall: 0.90
Caution: Hull subject to strain in open-sea
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

Warning: Beam between bulkheads too wide

Mission
This ship is meant to be a hunter.

At dusk or in poor weather, a division of 4 will will start a sweep at 22knots, seeking a way around the enemy battle line, seeking suport ships, tankers, or carriers. The 165mm guns are expected to be effective at closer ranges of night or weather.

The range, to support this plan, is immense, with a 19.0% fuel fraction, which is very high.That is however the upper end of what I find 'reasonable'.

Years ago I simmed empty USN WWII hulls, and came up with the idea that 19% fuel seems about the upper end of what they had. So I use 20% as a limit for my ships.

Overtake
Conceptually, if steaming at 22knots cruise, and meeting a vessel steaming at 14knots cruise, there would be a +8 knot advantage.

Assuming the ship traveling 14knots was steaming directly away, and immediately went to flank speed when the range was 21km and the mast tops were visible, but not the hull.

A carrier turning to launch, or a ship delaying flank speed, or if the Parthians are charging towards a spot, and they close faster. The same math works for them escaping as well.

Assuming both ships gained 1 knot per 2 minute turn, (aka non-Destroyers), it would take 38 minutes for the 14knot to hit 33knots (if they can) and slowly pull away.

In that time, the Pouseki would have closed 4.7nm or
7.425km, down to 13.5km. At that range the 165mm can cause a fair amount of damage. With A, B and S1,2,3 &4 bearing, 8 guns firing.

A ship moving 34knots would have a 2 knot advantage, and be able to pull away slowly, but would take an hour to reach 17km, and 2 hours to reach 20km. During which time a hail of 165mm hits may adversely effect performance.

Weaponry
From 1929.5 to 1931.0 the 165L55 is developed.
I thought I developed the 165L47, but looking at my turnsheets, it was L55.

With 1925 Tech, a 165L55 firing a 67.11 normal or *20% overwieght shell
is possible. 67.11 * 1.2 = 80.53kg as maximum shell weight.
Parthia considers 80-90kg the maximum reasonable handloading,
and a 165 firing a 80kg seems more compact than a 180L45,
and has better sectional density.

Power assist for loading/ramming/training is provided (10% main armanent weight), like the British 7.5".

The main armament is
C (E)
A (B) Y
D (F)

Centerline are 2-gun, flanking guns are singles
Giving 8 guns forward, 8 broadside and 4 aft

Which is a good chase armanent

Armor
Armor Belt is covers from from +1.5m to -1.7m
and is outsloped 15deg
3.2/cos (15) = 3.31288= 3.313 = 3.31

Range
2407 tons of fuel with geared drives (+15%) = 2768 effective tons

1,440 @ 33 knots
4,680 @ 22 knots
10,400 @ 16 knots
29,080 @ 10 knots

Misc. Weight :
100t: Construction Resv

57t : FC - 1930
25t : LR Radio
25t : Searchlight tower (NF)
25t : Hulesmeyer proximity detector
10t : Radio Jammer / RDF
0t : SR Radio

5t : Paravanes
52t : 4T3 21" TT + 4 roll down shutters (4t)
50t : Midships Scout & Fighter Floatplanes
10t : Gunpowder Cat Athwartships
10t : hanger
48t : Power Assist Main Battery Load/Ram/Train

HAW
8t : CO2 Compressor AC
8t : Additional Fire Suppresion

HBW
8t : Extra Pumps
6t : 5t extra AvGas, 1t Doublewall tank
15t : Enhanced Hydrophones

Decks :
+9.00
+6.50 : Forecastle deck
+4.00 : Battery deck/ weather deck
+1.50 : Main Armor deck, top main belt
-1.00 : 2nd deck
-1.50 : Bottom of armor belt
-3.50 :1st platform deck
-6.50 : Engineering
-6.73 : double bottom
-8.00 : Keel

Kaiser Kirk · April 17, 2024, 12:00:50 AM

I have been posting conceptual Coast or Light battleships off and on since I scrapped the Gatekeeper & Keymaster CBB class that guarded the Straits of Hormuz from the shallows of Khasab,

The old refurbished Armored Cruisers and Predreads mostly run at 23-24 knots and that fast enough to at least not easily be caught by Byzantine battleships- though their speed keeps increasing.

The class somewhat assumes that the opponent will be faster, and will choose a longer range, but it overall is reasonably armored for it's size.

The 333L43 are capable guns, and with 8 barrels can maintain spotting. Based on how the IJN were building their ships, they should be very good against those, but also capable against the various pre-dread style ships the Byzantines field. Though these probably would not face those, but they might face Mayan ships...or deter them.

QuoteFrawar "Bastion", Parthia Battleship laid down 1932

Displacement:
19,000 t light; 20,329 t standard; 21,514 t normal; 22,463 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(459.32 ft / 452.76 ft) x 91.86 ft (Bulges 95.14 ft) x (29.53 / 30.63 ft)
(140.00 m / 138.00 m) x 28.00 m (Bulges 29.00 m) x (9.00 / 9.34 m)

Armament:
8 - 13.11" / 333 mm 43.0 cal guns - 1,311.75lbs / 595.00kg shells, 110 per gun
Breech loading guns in turret on barbette mounts, 1927 Model
2 x 4-gun mounts on centreline ends, evenly spread
16 - 4.72" / 120 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 320 per gun
Quick firing guns in deck and hoist mounts, 1930 Model
6 x 2-gun mounts on sides, evenly spread
2 raised mounts
2 x 2-gun mounts on centreline ends, evenly spread
2 raised mounts
24 - 1.46" / 37.0 mm 90.0 cal guns - 1.79lbs / 0.81kg shells, 3,000 per gun
Quick firing guns in deck and hoist mounts, 1930 Model
4 x 2 row quad mounts on side ends, evenly spread
4 raised mounts
2 x 2 row quad mounts on sides, forward deck centre
2 double raised mounts
24 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
Anti-air guns in deck mounts, 1929 Model
12 x Twin mounts on sides, evenly spread
12 double raised mounts
Weight of broadside 11,429 lbs / 5,184 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.2" / 310 mm 316.93 ft / 96.60 m 15.49 ft / 4.72 m
Ends: 1.38" / 35 mm 135.79 ft / 41.39 m 12.01 ft / 3.66 m
Upper: 2.95" / 75 mm 316.93 ft / 96.60 m 7.51 ft / 2.29 m
Main Belt covers 108 % of normal length
Main Belt inclined -15.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.50" / 38 mm 316.93 ft / 96.60 m 33.07 ft / 10.08 m
Beam between torpedo bulkheads 62.34 ft / 19.00 m

- Hull Bulges:
0.35" / 9 mm 360.89 ft / 110.00 m 22.97 ft / 7.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.6" / 320 mm 4.72" / 120 mm 10.2" / 260 mm
2nd: 2.56" / 65 mm 1.57" / 40 mm 1.97" / 50 mm
3rd: 0.31" / 8 mm 0.31" / 8 mm 0.31" / 8 mm
4th: 0.31" / 8 mm - 0.31" / 8 mm

- Protected deck - multiple decks:
For and Aft decks: 5.31" / 135 mm
Forecastle: 1.38" / 35 mm Quarter deck: 3.94" / 100 mm

- Conning towers: Forward 10.04" / 255 mm, Aft 2.56" / 65 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 55,151 shp / 41,142 Kw = 24.00 kts
Range 6,570nm at 14.00 kts
Bunker at max displacement = 2,134 tons

Complement:
887 - 1,154

Cost:
£8.086 million / $32.343 million

Distribution of weights at normal displacement:
Armament: 2,075 tons, 9.6 %
- Guns: 2,075 tons, 9.6 %
Armour: 7,942 tons, 36.9 %
- Belts: 3,065 tons, 14.2 %
- Torpedo bulkhead: 580 tons, 2.7 %
- Bulges: 109 tons, 0.5 %
- Armament: 1,225 tons, 5.7 %
- Armour Deck: 2,752 tons, 12.8 %
- Conning Towers: 210 tons, 1.0 %
Machinery: 1,628 tons, 7.6 %
Hull, fittings & equipment: 6,737 tons, 31.3 %
Fuel, ammunition & stores: 2,515 tons, 11.7 %
Miscellaneous weights: 618 tons, 2.9 %
- Hull below water: 157 tons
- Bulge void weights: 110 tons
- Hull above water: 38 tons
- On freeboard deck: 30 tons
- Above deck: 283 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
31,291 lbs / 14,193 Kg = 27.8 x 13.1 " / 333 mm shells or 6.0 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 5.7 ft / 1.7 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.60
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.592 / 0.596
Length to Beam Ratio: 4.76 : 1
'Natural speed' for length: 21.28 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 23.62 ft / 7.20 m, 21.16 ft / 6.45 m
- Forward deck: 35.00 %, 21.16 ft / 6.45 m, 18.70 ft / 5.70 m
- Aft deck: 35.00 %, 18.70 ft / 5.70 m, 18.70 ft / 5.70 m
- Quarter deck: 10.00 %, 18.70 ft / 5.70 m, 18.70 ft / 5.70 m
- Average freeboard: 19.82 ft / 6.04 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.9 %
- Above water (accommodation/working, high = better): 125.2 %
Waterplane Area: 30,193 Square feet or 2,805 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 180 lbs/sq ft or 880 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 2.97
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

Designed as a 'cheap' replacement to the old predreadnaughts capable of supporting the territorial fleets and providing convoy escorts. These could also oppose similar byzantine ships, but would compete in the build order with the Armored cruisers.

The class reverts to a protected deck and armored upper citadel.
The upper armored deck is 35mm, proof against bombs and QF

Upper Belt :
The Main belt rises to 1.5m below the weather deck,
while the Upper belt covers the height of 2 decks forward, 1 deck aft, for (5-1.5)/2 + (2.5-1.5)/2 = 2.25m average height.
This is outsloped at 10%
2.25/cos (10) = 2.2849 =2.285 = 2.29

Main Belt :
Covers from 2.6m above WL to -2m below WL, rising 1m above the crown of the protective deck, and 1.1m below the lower edge of the protective deck. A total height of 4.6m.
This follows the line of the hull and is outsloped at 15%.
4.6/cos(15) = 4.7222 = 4.72

Waterline protection : 310mm (belt) outsloped backed by the 100mm protective deck and the 38mm TDS = 310+ (100*1.5)/2 + 38/2 = 394

End Belts : These are thickened slopes for protective decks,
so 70mm slopes fore, and 145mm slopes aft.

Decks : The citadel is protected by a 35mm upper deck and 100mm protective deck, for a vertical of 117mm. The upper deck thereby serves as a bomb deck to activate and detonate the shells and bombs short of the main deck.

The slopes of the protective deck are largely protected by the main belt rising above it.

TDS : TDS rises to seal to the bottom of the protective deck at +1.6m above WL

Reserve : 110t

AD
208t - Fire Control 1930
25t - LR Radio
25t - Hulesmeyer
25t - Searchlight Tower (NF)

OD
5t - Paravanes
20t- Scout Plane
5t - Gunpowder Cat

HAW
19t - Extra Fire Extinguishers
19t - CO2 Compressor AC

HBW
19t - Extra Pumps
138t - Torpedo Nets

Decks
+6.6 forecastle deck
+4.1 weather deck - 35mm
+2.6 top of main belt, bottom of upper belt
+1.6 Crown of portective deck 100mm,
-0.90 bottom of protective deck slope,
-2.0 bottom of main belt
-3.44 2nd Deck
-5.94 Engineering Deck
-6.99 double bottom, bottom of torpedo defenses
-7.25 - Keel

Jefgte · April 17, 2024, 12:37:56 AM

Old things go to the scrapyard.
Their inexpensive replacements are dissuasive and offer a very wide range of uses.

Kaiser Kirk · April 17, 2024, 08:36:58 AM

Quote from: Jefgte on April 17, 2024, 12:37:56 AMOld things go to the scrapyard.
Their inexpensive replacements are dissuasive and offer a very wide range of uses.

The Rustam and Sparabara classes of ACs, the Tortoise Class of PB - they are all getting scrapped soon regardless of if I've built replacements.

The Rohk class will probably stay in service as a training platform, but could be scrapped. The double-casement monsters would be scary to a cruiser, but that's about all.

The Simurgh, with the 4x 333L43 will stay in service a while - I think it has a good chance of beating a IJN BC, so can serve in a defender role.

But if I can find the BP to build this, I can replace that as well, move it to training and scrap the Rohk.

TacCovert4 · April 17, 2024, 09:04:15 AM

Given the Parthian-Aztec alignment in 1930, well at least a limited alignment, these also make a lot of sense. The 3 Implacable-class BBs that the Sultanate has refit are also 24kts with similar armor profiles, though 10 x 280 rather than 8 x 333. A couple of these in the Caribbean or West Coast areas would match up well with the Implacables as a 2nd line battle-squadron, or even be able to fall in line with the Monarchs, Majestics, or Victories for battle line service, even if their protection is a bit lacking to stand fully with their 27,000t cousins.

Quote from: Kaiser Kirk on April 17, 2024, 12:00:50 AMI have been posting conceptual Coast or Light battleships off and on since I scrapped the Gatekeeper & Keymaster CBB class that guarded the Straits of Hormuz from the shallows of Khasab,

The old refurbished Armored Cruisers and Predreads mostly run at 23-24 knots and that fast enough to at least not easily be caught by Byzantine battleships- though their speed keeps increasing.

The class somewhat assumes that the opponent will be faster, and will choose a longer range, but it overall is reasonably armored for it's size.

The 333L43 are capable guns, and with 8 barrels can maintain spotting. Based on how the IJN were building their ships, they should be very good against those, but also capable against the various pre-dread style ships the Byzantines field. Though these probably would not face those, but they might face Mayan ships...or deter them.

QuoteFrawar "Bastion", Parthia Battleship laid down 1932

Displacement:
19,000 t light; 20,329 t standard; 21,514 t normal; 22,463 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(459.32 ft / 452.76 ft) x 91.86 ft (Bulges 95.14 ft) x (29.53 / 30.63 ft)
(140.00 m / 138.00 m) x 28.00 m (Bulges 29.00 m) x (9.00 / 9.34 m)

Armament:
8 - 13.11" / 333 mm 43.0 cal guns - 1,311.75lbs / 595.00kg shells, 110 per gun
Breech loading guns in turret on barbette mounts, 1927 Model
2 x 4-gun mounts on centreline ends, evenly spread
16 - 4.72" / 120 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 320 per gun
Quick firing guns in deck and hoist mounts, 1930 Model
6 x 2-gun mounts on sides, evenly spread
2 raised mounts
2 x 2-gun mounts on centreline ends, evenly spread
2 raised mounts
24 - 1.46" / 37.0 mm 90.0 cal guns - 1.79lbs / 0.81kg shells, 3,000 per gun
Quick firing guns in deck and hoist mounts, 1930 Model
4 x 2 row quad mounts on side ends, evenly spread
4 raised mounts
2 x 2 row quad mounts on sides, forward deck centre
2 double raised mounts
24 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
Anti-air guns in deck mounts, 1929 Model
12 x Twin mounts on sides, evenly spread
12 double raised mounts
Weight of broadside 11,429 lbs / 5,184 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.2" / 310 mm 316.93 ft / 96.60 m 15.49 ft / 4.72 m
Ends: 1.38" / 35 mm 135.79 ft / 41.39 m 12.01 ft / 3.66 m
Upper: 2.95" / 75 mm 316.93 ft / 96.60 m 7.51 ft / 2.29 m
Main Belt covers 108 % of normal length
Main Belt inclined -15.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.50" / 38 mm 316.93 ft / 96.60 m 33.07 ft / 10.08 m
Beam between torpedo bulkheads 62.34 ft / 19.00 m

- Hull Bulges:
0.35" / 9 mm 360.89 ft / 110.00 m 22.97 ft / 7.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.6" / 320 mm 4.72" / 120 mm 10.2" / 260 mm
2nd: 2.56" / 65 mm 1.57" / 40 mm 1.97" / 50 mm
3rd: 0.31" / 8 mm 0.31" / 8 mm 0.31" / 8 mm
4th: 0.31" / 8 mm - 0.31" / 8 mm

- Protected deck - multiple decks:
For and Aft decks: 5.31" / 135 mm
Forecastle: 1.38" / 35 mm Quarter deck: 3.94" / 100 mm

- Conning towers: Forward 10.04" / 255 mm, Aft 2.56" / 65 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 55,151 shp / 41,142 Kw = 24.00 kts
Range 6,570nm at 14.00 kts
Bunker at max displacement = 2,134 tons

Complement:
887 - 1,154

Cost:
£8.086 million / $32.343 million

Distribution of weights at normal displacement:
Armament: 2,075 tons, 9.6 %
- Guns: 2,075 tons, 9.6 %
Armour: 7,942 tons, 36.9 %
- Belts: 3,065 tons, 14.2 %
- Torpedo bulkhead: 580 tons, 2.7 %
- Bulges: 109 tons, 0.5 %
- Armament: 1,225 tons, 5.7 %
- Armour Deck: 2,752 tons, 12.8 %
- Conning Towers: 210 tons, 1.0 %
Machinery: 1,628 tons, 7.6 %
Hull, fittings & equipment: 6,737 tons, 31.3 %
Fuel, ammunition & stores: 2,515 tons, 11.7 %
Miscellaneous weights: 618 tons, 2.9 %
- Hull below water: 157 tons
- Bulge void weights: 110 tons
- Hull above water: 38 tons
- On freeboard deck: 30 tons
- Above deck: 283 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
31,291 lbs / 14,193 Kg = 27.8 x 13.1 " / 333 mm shells or 6.0 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 5.7 ft / 1.7 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.60
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.592 / 0.596
Length to Beam Ratio: 4.76 : 1
'Natural speed' for length: 21.28 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 23.62 ft / 7.20 m, 21.16 ft / 6.45 m
- Forward deck: 35.00 %, 21.16 ft / 6.45 m, 18.70 ft / 5.70 m
- Aft deck: 35.00 %, 18.70 ft / 5.70 m, 18.70 ft / 5.70 m
- Quarter deck: 10.00 %, 18.70 ft / 5.70 m, 18.70 ft / 5.70 m
- Average freeboard: 19.82 ft / 6.04 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.9 %
- Above water (accommodation/working, high = better): 125.2 %
Waterplane Area: 30,193 Square feet or 2,805 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 180 lbs/sq ft or 880 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 2.97
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

Designed as a 'cheap' replacement to the old predreadnaughts capable of supporting the territorial fleets and providing convoy escorts. These could also oppose similar byzantine ships, but would compete in the build order with the Armored cruisers.

The class reverts to a protected deck and armored upper citadel.
The upper armored deck is 35mm, proof against bombs and QF

Upper Belt :
The Main belt rises to 1.5m below the weather deck,
while the Upper belt covers the height of 2 decks forward, 1 deck aft, for (5-1.5)/2 + (2.5-1.5)/2 = 2.25m average height.
This is outsloped at 10%
2.25/cos (10) = 2.2849 =2.285 = 2.29

Main Belt :
Covers from 2.6m above WL to -2m below WL, rising 1m above the crown of the protective deck, and 1.1m below the lower edge of the protective deck. A total height of 4.6m.
This follows the line of the hull and is outsloped at 15%.
4.6/cos(15) = 4.7222 = 4.72

Waterline protection : 310mm (belt) outsloped backed by the 100mm protective deck and the 38mm TDS = 310+ (100*1.5)/2 + 38/2 = 394

End Belts : These are thickened slopes for protective decks,
so 70mm slopes fore, and 145mm slopes aft.

Decks : The citadel is protected by a 35mm upper deck and 100mm protective deck, for a vertical of 117mm. The upper deck thereby serves as a bomb deck to activate and detonate the shells and bombs short of the main deck.

The slopes of the protective deck are largely protected by the main belt rising above it.

TDS : TDS rises to seal to the bottom of the protective deck at +1.6m above WL

Reserve : 110t

AD
208t - Fire Control 1930
25t - LR Radio
25t - Hulesmeyer
25t - Searchlight Tower (NF)

OD
5t - Paravanes
20t- Scout Plane
5t - Gunpowder Cat

HAW
19t - Extra Fire Extinguishers
19t - CO2 Compressor AC

HBW
19t - Extra Pumps
138t - Torpedo Nets

Decks
+6.6 forecastle deck
+4.1 weather deck - 35mm
+2.6 top of main belt, bottom of upper belt
+1.6 Crown of portective deck 100mm,
-0.90 bottom of protective deck slope,
-2.0 bottom of main belt
-3.44 2nd Deck
-5.94 Engineering Deck
-6.99 double bottom, bottom of torpedo defenses
-7.25 - Keel