Parthian Ships 1928 +

Kaiser Kirk · February 01, 2024, 09:51:37 PM

Quote from: The Rock Doctor on January 31, 2024, 07:01:02 PM
Obviously I like the general idea. I'd be curious to see the Parthian risk assessment as to which regions are most likely to require its services.

A central concept to Parthia is the central government does the big stuff well, but very traditional and slow to change. The limited democracy is mostly active at the local level, allowing people input on many of the rules that impact their daily lives.

Among the big things is planning for wood & water supplies, infrastructure, education, security and disasters.

So crop failures, plagues, fire, flood, and the various earthquakes* historical Iran are something the central government is supposed to blunt the impact of. I've meant to actually do a story showcasing how military engineer , quartermaster and medical units will respond and be assisted by National Service personnel.

Theoretically, the Parthians are trying to treat the territories as extensions of the Empire, not just founding immigrant cities and developing resources, but also providing infrastructure and basic government services broadly...including shipping Parthian youth to the territories to dig in the dirt to build them roads and canals.

But the disaster response ability would probably be limited in those areas. Currently, the local troops and service folks could do something, but more would have to come from Parthia. Which the trip to Azteca shows could be a month - and that's at 14 knots not 10. That's on top of muster time.

For something like the Indonesian tidal wave, or the Hurricane that hit Puerto Rico, even the Camp fire that wiped out Paradise, CA...
For that , I need a ship that can mobilize quickly and transit a long distance at a pretty good speed.

I figure to start with one ship at probably Brunei or Somoa and one probably in Freetown, and perhaps a 3rd at Tis.
That would put pretty much every coastal province no more than 5400nm away.

5400nm at 10knots is 22 days while at 16 it is 14 days. While that is still a very long time, it's a week less.
If the area is closer, the vessel can push to higher speeds, and get there sooner.

The port may not be proximate, or destroyed, so the ship needs it's own motorized lighters. This would also help extend the response a river where the ship can't go.

A critical need is engineers - dozers to open roads, pioneers to build a timber bridge fast, cranes to offload ships if a port has been destroyed.
Restoring transport links is critical for helping others get here.

Doctors, and basic medical care to deal with patients who have survived the first couple weeks, but more importantly those now weakened by hunger or dealing with injuries.

Basic supplies - tents, spare clothes, food, water distillers, etc would be in the holds.

I added the floatplanes as in a true disaster, having aerial scouting to assess the situation - or even to land on a river/lake to drop off
people - could be useful.

So that's the thought process behind it.

What am I getting off, what would be good to fit in??
I have 4500t in generic stores which could be turned into many specific stores..

*The Tibetans have a timberframe & stone/mudbrick building style which works well for earthquakes, and I have mentally adopted it. The Persians also used multiple layers of large ashlar stones under major features, such as the Tomb of Cyrus, which serve to isolate them. So Earthquakes are still problematic, but there's Parthian building styles which reduce impacts.

Kaiser Kirk · February 03, 2024, 07:16:24 PM

A problem I expend a tremendous amount of resources on is merely establishing a coast guard / naval patrol presence.

There are 22 ocean going gunboats, 1 building but many very old.
These are joined by large numbers of auxiliary craft. I figure as aux builds, they are primarily staffed by reservist and only 1/4 in service in peacetime, so the 100 Patrol sloops become 25 hulls for non-mobilized peacekeeping.
Then there's the 128 "Gnat" class that become 32 hulls for non-mobilized peacekeeping.

That's actually 79 ships to provide a maritime presence, which I'm rather pleased with.

....but the older active-duty gunboats need replacing.
The Sibaris and new Hukar class allow the Dolphins and Recaldes to be retired, but I think I need a smaller and cheaper options.

So this works off the old Mackerel class but is updated.
Sturgeons are armored fish, so seems appropriate.

One notable thing is the amount of ammunition.
Overall I expect you'll see Parthian ammo loads increase as Long Range fire with low % and for DP mounts the need for AP/SAP/C/AA mix.

This ship has a fully armored hull, which should defeat opposing Common rounds- which would be the most common type.
But also if there's gunfire from the bank, the ship will be basically immune.

The draft is shallow enough they would have to reset the default depth setting, and it's hard to get a torpedo to hit it without breaching the surface.

Diesel-Electric is seen as useful for station keeping- helpful for boarding, shore actions, and minesweeping. Electric batteries are provided so the ship can make a silent approach to a port or vessel, allowing it to land the marines by surprise.

I use 0.1% for air conditioning, and in this case the lack of scuttles means the ventilation will be poor, so I doubled it...to 1 ton, from 1/2 ton.

NF gear, I use 25t for battleship level, otherwise equal to the Fire control amount for 'reasonable'.

Quote

Sturgeon, Parthian Coastal Patrol Cutter laid down 1930

Displacement:
   450 t light; 504 t standard; 562 t normal; 608 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (162.84 ft / 160.76 ft) x 23.79 ft x (8.76 / 9.34 ft)
   (49.63 m / 49.00 m) x 7.25 m x (2.67 / 2.85 m)

Armament:
4 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Dual purpose guns in deck mounts, 1929 Model
     2 x 2-gun mounts on centreline, forward evenly spread
      1 raised mount
1 - 4.65" / 118 mm 21.0 cal gun - 59.52lbs / 27.00kg shells, 300 per gun
     Breech loading gun in deck mount, 1921 Model
     1 x Single mount on centreline, aft deck forward
      1 raised mount
8 - 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
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
Weight of broadside 160 lbs / 73 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.98" / 25 mm   104.49 ft / 31.85 m   10.17 ft / 3.10 m
   Ends:   0.98" / 25 mm     56.23 ft / 17.14 m   10.17 ft / 3.10 m
     Main Belt covers 100 % 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:   0.31" / 8 mm     -           -
   2nd:   0.31" / 8 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 0.59" / 15 mm
   Forecastle: 0.59" / 15 mm Quarter deck: 0.59" / 15 mm

- Conning towers: Forward 0.98" / 25 mm, Aft 0.00" / 0 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 1,629 ihp / 1,215 Kw = 16.00 kts
   Range 2,880nm at 12.00 kts
   Bunker at max displacement = 104 tons

Complement:
   57 - 75

Cost:
   £0.134 million / $0.537 million

Distribution of weights at normal displacement:
   Armament: 27 tons, 4.9 %
     - Guns: 27 tons, 4.9 %
   Armour: 100 tons, 17.9 %
     - Belts: 66 tons, 11.8 %
     - Armament: 2 tons, 0.4 %
     - Armour Deck: 30 tons, 5.4 %
     - Conning Tower: 1 tons, 0.3 %
   Machinery: 64 tons, 11.5 %
   Hull, fittings & equipment: 115 tons, 20.5 %
   Fuel, ammunition & stores: 112 tons, 19.9 %
   Miscellaneous weights: 143 tons, 25.5 %
     - Hull below water: 40 tons
     - Hull void weights: 4 tons
     - Hull above water: 33 tons
     - On freeboard deck: 35 tons
     - Above deck: 31 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     695 lbs / 315 Kg = 31.3 x 3.5 " / 90 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.08
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 12.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0.68
   Seaboat quality (Average = 1.00): 1.32

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.587 / 0.595
   Length to Beam Ratio: 6.76 : 1
   'Natural speed' for length: 12.68 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 11.81 ft / 3.60 m, 10.17 ft / 3.10 m
     - Forward deck:   32.50 %, 10.17 ft / 3.10 m, 8.53 ft / 2.60 m
     - Aft deck:   32.50 %, 8.53 ft / 2.60 m, 8.53 ft / 2.60 m
     - Quarter deck:   15.00 %, 8.53 ft / 2.60 m, 8.53 ft / 2.60 m
     - Average freeboard:      9.26 ft / 2.82 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 71.2 %
      - Above water (accommodation/working, high = better): 82.5 %
   Waterplane Area: 2,763 Square feet or 257 Square metres
   Displacement factor (Displacement / loading): 127 %
   Structure weight / hull surface area: 28 lbs/sq ft or 134 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.65
      - Longitudinal: 2.66
      - Overall: 0.75
   Caution: Hull subject to strain in open-sea
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Still seeking an economical gunboat, the Parthians look to the now elder Mackrel design

The Coastal Patrol vessel is equipped with 90mm DP mounts forward.
Aft, a 118mm HOW is mounted in X, well clear of the equipment on the aft deck.
Four GAST 23mm provide AA

Armor :
The weather deck is the armored deck, from bow to stern,
while the Side is fully armored from deck to -2.5m below WL
Due to the lack of scuttles, additional tonnage is given to ventilarion

Range : 2880 * 1.90 = 5,472nm = 456hr = 19 days

Misc Weight :
4t Void

AD
3t - 1918 FC
0t - SR radio
3t - NF Gear
25t - Hulesmeyer remote detection system.

OD
10t - 5t Motor launch, fits 16men (4t) + engine
25t - Minesweeping gear on aft deck

HAW
1t - Enhanced ventilation (2x CO2 Compressor AC)
32t - 16 Marines (Section)

HBW
20t - Diesel
16t - Turbogenerator
4t - Electric battery

Decks
+2.6 : Weather Deck, 20mm armor deck.
+0.1 : First Deck / Armor deck 15mm
-2.51 : Engineering

Kaiser Kirk · February 03, 2024, 07:44:44 PM

An AA refit for the fleet destroyers of the Vakharz class...which I accidentally saved over the Sturgeon design..ARGH.

Vakharz "Wolf" BR30, Parthian Empire Fleet Destroyer laid down 1924

Quote
Displacement:
   1,132 t light; 1,201 t standard; 1,380 t normal; 1,523 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (339.13 ft / 334.65 ft) x 31.99 ft x (10.93 / 11.72 ft)
   (103.37 m / 102.00 m) x 9.75 m x (3.33 / 3.57 m)

Armament:
4 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 228 per gun
     Dual purpose guns in deck mounts, 1929 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
8 - 1.46" / 37.0 mm 70.0 cal guns - 1.73lbs / 0.79kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1929 Model
     2 x 2 row quad mounts on sides, forward deck aft
      2 raised mounts
8 - 0.91" / 23.0 mm 90.0 cal guns - 0.43lbs / 0.20kg shells, 3,000 per gun
     Machine guns in deck mounts, 1924 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
Weight of broadside 238 lbs / 108 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.24" / 6 mm     -           -
   2nd:   0.24" / 6 mm     -           -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 1 shaft, 27,016 shp / 20,154 Kw = 31.10 kts
   Range 5,000nm at 14.00 kts
   Bunker at max displacement = 322 tons

Complement:
   113 - 147

Cost:
   £0.456 million / $1.826 million

Distribution of weights at normal displacement:
   Armament: 44 tons, 3.2 %
     - Guns: 44 tons, 3.2 %
   Armour: 3 tons, 0.2 %
     - Armament: 3 tons, 0.2 %
   Machinery: 689 tons, 50.0 %
   Hull, fittings & equipment: 324 tons, 23.5 %
   Fuel, ammunition & stores: 248 tons, 18.0 %
   Miscellaneous weights: 71 tons, 5.1 %
     - Hull below water: 25 tons
     - Hull above water: 1 tons
     - On freeboard deck: 36 tons
     - Above deck: 9 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     394 lbs / 179 Kg = 7.5 x 4.7 " / 120 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.48
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.23
   Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.413 / 0.425
   Length to Beam Ratio: 10.46 : 1
   'Natural speed' for length: 18.29 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 16.73 ft / 5.10 m, 14.27 ft / 4.35 m
     - Forward deck:   20.00 %, 14.27 ft / 4.35 m, 11.81 ft / 3.60 m
     - Aft deck:   45.00 %, 11.81 ft / 3.60 m, 11.81 ft / 3.60 m
     - Quarter deck:   15.00 %, 11.81 ft / 3.60 m, 11.81 ft / 3.60 m
     - Average freeboard:      12.75 ft / 3.89 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 173.5 %
      - Above water (accommodation/working, high = better): 129.3 %
   Waterplane Area: 6,292 Square feet or 585 Square metres
   Displacement factor (Displacement / loading): 70 %
   Structure weight / hull surface area: 29 lbs/sq ft or 143 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.32
      - Overall: 0.55
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

1930 AA Basic Refit of the Vakharz Class

AS 120 -> DP 120
2G 57mm -> 4G 37mm
Gast 15mm -> Gast 23mm
Total :88

4.5t New Fire Control
4.5t New Night fighting
0t New Radios
4t - additional 120mm ammo lockers.

24t 2TT3 21" 3t -> 2TT3 21" 4t

Cost :$0.125 / 0.125

New Misc Wt.

AD
4.5t FC 1918
4.5t NF
0t - SR Radio

OD
2t Lt Paravanes
2t - 2x Y thrower
8t - 24x 280kg DC
24t - 2TT3 21" 4t

HAW
1t - CO2 compressor AC

HBW
15t - Enhanced hydrophone package
10t - Basic Sonar

Kaiser Kirk · February 03, 2024, 08:34:54 PM

The Pirate class, when built, I was happy with.
Fairly well armed, fairly fast, decent range.
20 years later the standards have moved and they are no longer suited for fleet service.

There is a usable role as torpedo boats. The Byzantines have been doing this, which also puts pressure on the Parthians to match the Byzantine abilities. Coincidentally both powers have large fleets...

As torpedo boats the would not focus against enemy battlelines unless supporting other forces in a night attack.

They may encounter smaller ships, and make attacks against smaller combatants and merchants.

So the class is rearmed with the current 90mm, given some anti-aircraft ability, and re-equipped with 18" torpedoes,
on the theory that more torps = better chance to hit, and on a cruiser, destroyer or merchant, a large diameter hole from an 18" is nearly as effective as a larger diameter hole from a 21"...the basic problem of a large hole pouring water into the hull would threaten either vessel.

Pirate Refurb30, Parthian R class Destroyer laid down 1910

Quote
Displacement:
   749 t light; 780 t standard; 922 t normal; 1,035 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (289.00 ft / 278.87 ft) x 27.33 ft x (10.66 / 11.51 ft)
   (88.09 m / 85.00 m) x 8.33 m x (3.25 / 3.51 m)

Armament:
3 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 200 per gun
     Dual purpose guns in deck mounts, 1929 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
4 - 1.18" / 30.0 mm 80.0 cal guns - 0.95lbs / 0.43kg shells, 1,000 per gun
     Anti-air guns in deck mount, 1929 Model
     1 x 2 row quad mount on centreline, aft deck centre
      1 raised mount
4 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 2,000 per gun
     Machine guns in deck mounts, 1929 Model
     2 x Twin mounts on centreline, forward deck aft
      2 double raised mounts
Weight of broadside 78 lbs / 36 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.12" / 3 mm     -           -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 18,400 shp / 13,727 Kw = 29.50 kts
   Range 4,600nm at 12.00 kts
   Bunker at max displacement = 255 tons

Complement:
   83 - 108

Cost:
   £0.100 million / $0.398 million

Distribution of weights at normal displacement:
   Armament: 20 tons, 2.2 %
     - Guns: 20 tons, 2.2 %
   Armour: 1 tons, 0.1 %
     - Armament: 1 tons, 0.1 %
   Machinery: 487 tons, 52.9 %
   Hull, fittings & equipment: 221 tons, 24.0 %
   Fuel, ammunition & stores: 172 tons, 18.7 %
   Miscellaneous weights: 20 tons, 2.2 %
     - Hull void weights: 1 tons
     - Hull above water: 1 tons
     - On freeboard deck: 14 tons
     - Above deck: 4 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     265 lbs / 120 Kg = 11.9 x 3.5 " / 90 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.52
   Metacentric height 1.5 ft / 0.4 m
   Roll period: 9.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 52 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality (Average = 1.00): 1.05

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.397 / 0.413
   Length to Beam Ratio: 10.20 : 1
   'Natural speed' for length: 16.70 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 29.00 degrees
   Stern overhang: -3.00 ft / -0.91 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 18.27 ft / 5.57 m, 16.47 ft / 5.02 m
     - Forward deck:   32.00 %, 16.47 ft / 5.02 m, 14.67 ft / 4.47 m
     - Aft deck:   33.00 %, 6.46 ft / 1.97 m, 6.46 ft / 1.97 m
     - Quarter deck:   15.00 %, 6.46 ft / 1.97 m, 6.46 ft / 1.97 m
     - Average freeboard:      11.52 ft / 3.51 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 176.9 %
      - Above water (accommodation/working, high = better): 117.6 %
   Waterplane Area: 4,682 Square feet or 435 Square metres
   Displacement factor (Displacement / loading): 58 %
   Structure weight / hull surface area: 25 lbs/sq ft or 123 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.76
      - Overall: 0.56
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room

After 20 years of service, in need of refurbishment.
Lacking the requisite reserves for ASW work,
kept for torpedo boat work.

The raised X 90mm is replaced with AA
the main 90mm are replaced with modern guns

Basic Cost : $0.15

Guns & Mounts : 21t
$0.042, 0.021

Func Misc : 19t
$0.019, 0.019

Mags : 12t
$0.006

Total : $ 0.217, .04

Reserve :

AD
2t FC 1918
2t NF
0t SR Radio

OD
2t - Lt. Paravanes
12t - 2TT3 18"torp

HAW
1t CO2 Compressor AC

HBW

Kaiser Kirk · February 04, 2024, 02:07:34 AM

A re-created Sturgeon class Springsharp, with a couple minor tweaks.

Quote
Sturgeon, Parthian Coastal Patrol Cutter laid down 1930

Displacement:
   460 t light; 515 t standard; 562 t normal; 599 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (162.84 ft / 160.76 ft) x 26.25 ft x (8.73 / 9.18 ft)
   (49.63 m / 49.00 m) x 8.00 m x (2.66 / 2.80 m)

Armament:
4 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Dual purpose guns in deck mounts, 1930 Model
     2 x 2-gun mounts on centreline, forward evenly spread
      1 raised mount
1 - 4.65" / 118 mm 21.0 cal gun - 59.52lbs / 27.00kg shells, 300 per gun
     Breech loading gun in deck mount, 1930 Model
     1 x Single mount on centreline, aft deck forward
      1 raised mount
8 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 3,400 per gun
     Machine guns in deck mounts, 1930 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
Weight of broadside 160 lbs / 73 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.98" / 25 mm   104.49 ft / 31.85 m   12.24 ft / 3.73 m
   Ends:   0.98" / 25 mm     56.23 ft / 17.14 m   12.40 ft / 3.78 m
     Main Belt covers 100 % 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:   0.59" / 15 mm     -           -
   2nd:   0.59" / 15 mm     -           -
   3rd:   0.59" / 15 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 0.59" / 15 mm
   Forecastle: 0.59" / 15 mm Quarter deck: 0.59" / 15 mm

- Conning towers: Forward 0.98" / 25 mm, Aft 0.00" / 0 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 1,615 shp / 1,204 Kw = 16.00 kts
   Range 3,000nm at 12.00 kts
   Bunker at max displacement = 84 tons

Complement:
   57 - 75

Cost:
   £0.127 million / $0.507 million

Distribution of weights at normal displacement:
   Armament: 27 tons, 4.9 %
     - Guns: 27 tons, 4.9 %
   Armour: 121 tons, 21.5 %
     - Belts: 80 tons, 14.3 %
     - Armament: 7 tons, 1.3 %
     - Armour Deck: 32 tons, 5.7 %
     - Conning Tower: 1 tons, 0.3 %
   Machinery: 49 tons, 8.7 %
   Hull, fittings & equipment: 121 tons, 21.6 %
   Fuel, ammunition & stores: 101 tons, 18.1 %
   Miscellaneous weights: 142 tons, 25.3 %
     - Hull below water: 40 tons
     - Hull void weights: 3 tons
     - Hull above water: 33 tons
     - On freeboard deck: 35 tons
     - Above deck: 31 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     833 lbs / 378 Kg = 37.5 x 3.5 " / 90 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 11.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.534 / 0.542
   Length to Beam Ratio: 6.13 : 1
   'Natural speed' for length: 12.68 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 11.81 ft / 3.60 m, 10.17 ft / 3.10 m
     - Forward deck:   32.50 %, 10.17 ft / 3.10 m, 8.53 ft / 2.60 m
     - Aft deck:   32.50 %, 8.53 ft / 2.60 m, 8.53 ft / 2.60 m
     - Quarter deck:   15.00 %, 8.53 ft / 2.60 m, 8.53 ft / 2.60 m
     - Average freeboard:      9.26 ft / 2.82 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 62.6 %
      - Above water (accommodation/working, high = better): 86.7 %
   Waterplane Area: 2,901 Square feet or 270 Square metres
   Displacement factor (Displacement / loading): 130 %
   Structure weight / hull surface area: 29 lbs/sq ft or 143 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.66
      - Longitudinal: 2.43
      - Overall: 0.75
   Caution: Hull subject to strain in open-sea
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

This Coastal Patrol vessel named for an armored fish.

An updated version of the Mackarel Class, intended to provide
a light gunboat for littoral and riverine patrol.

The armane most nt is adequate for stopping merchants, landing boarding parties, or - using the batteries- silently gliding into harbors to lan the marines to enforce laws.

The fully armored hull and armanent make it effective against insurgencies and for amphibious landings.

Like many Parthian gunboats, it has a mixture of direct fire weapons and a howitzer, supplemented by rapid fire cannon, allowing it to support the landing parties effectively.

The vessel is large enough and capable of ocean transit, but with the 11shallow draft and low seaboard would be unpleasent in bad seas.

Armor :
The hull is fully armored from the weather deck down to -1m below WL
The belt heights are averaged to account for the bow flare.

The main armored deck is at the weather deck level, capping the belt.

Misc Wt
3t Void

AD
3t- 1918 FC
3t- NF gear
0t - SR Radio
25t - Hulesmeyer remote detection system

OD
10t - 5t Motor Launch, fits 16men (4t) + engine
25t - Minesweeeping gear on aft deck

HAW
1t - Enhanced ventilation (2x CO2 Compressor AC)
32t - 16 Marines (Section)

HBW
20t - Diesel
16t- Turbogenerator
4t - Electric Battery

Decks
+2.6 : Weather Deck, Armor Deck
+0.1 : Main deck
-1.0 : Bottom main belt
-2.51 : Engineering.

Kaiser Kirk · March 10, 2024, 03:13:52 PM

Quote
1931 vessels

Refits
At then end of 1930, two significant technologies were finished :
1930: Electromechanical FC computers - 30km
1930: Primitive search RADAR. Large and crude. Long range airborne directional indicator.

Updating from 1918 to 1930 FC is a priority for the ships that can fire that far - cruisers and above.
Granted, weather does not always allow use of spotter planes to engage at that distance.
The FC improvements, particularly for secondary and AA weapons are viewed as important fleetwide.

Night Fighting : We have defaulted to 25 tons = 1 unit of some Misc weight item.
I know a USS Texas style cage mast was 23tons.. I'm guessing 25t is 'ballpark' for a RN Searchlight tower.
So I use 25t as the max for night-fighting.
For smaller ships, I match it to whatever I'm paying in Fire Control.
So a 208t armament leads to 21t of FC and 21t of Night Fighting, while 456 tons of armament leads to 46t FC and 25t NF.

I also have other 'home rules' such as 0.1% (1:1000) tonnage for Pumps/Fire Ext and other things that scale to the ship.
Probably one of those areas a group discussion is warranted at some point.

RADAR - I am using 50 tons for this "Large and Crude" device and will be mounting it on larger vessels.
The exact utility is unclear, but multiple sets should provide early warning of air raids, while allowing triangulation of the source.

Parthia has long fielded anything they could think of to help surveillance - War Tubas, Battleship-height Cage masts on smaller ships, kite balloons, floatplanes, Hulesmeyer proximity detectors, Enhanced Hydrophones to listen for screws, etc. Not all of it has been worth mounting...

But being able to come to battle stations and take formation - or provide sufficient warning to flee - has been seen as valuable.
The Chinese version of the Japanese-Sino war prompted much of this. The Chinese sought publicity and so gave their version of the MTB attacks, and particularly the final battle where the Chinese fleet pinned the Japanese amphibious force and battlefleets against the island. The Parthians shortly afterwards started fielding 'Sentry' cruisers with an eye toward avoiding such things - and to ensure Parthian harbors could be picketed against surprise.

AA Refits :
AA refits started in 1930, and will continue.
After each AA refit, the 1918 FC was re-installed.
Now, the

Previously the 1925 Naval Artillery had been finished in 1927, with the gun & mount research finishing in 1929.
The 1926 primitive DP tech was also available by the end of 1928, and so those mounts have been researched.
Once all that was done, a whole series of new guns & shells were researched, many finishing at the end of 1931.0
and so available in 1931.5 and 1932.0.

Refurbishments
I had been using 20 years as 'useful lifespan' and +12 years after a refurbishment or better.
Reading about HMS Warspite's overhaul, they expected +15 years.
So I am moving to +15 years.

I still think the lifespan & maintenance cost should be by type, and stated in the rules...but that's not what we're doing.

Future Classes
With all the new guns and mounts, I will likely be starting a number of new classes.
As for future classes I don't tend to post them until slightly before they are to be built.
But I have quite a few planned and potential ship classes to choose from.
Generally there are quite a few iterations of each basic class,
so I updated the 'best' to the time period I might build them, and
put together a list so I can evaluate my choices.

Here's a list of most of them :

Laid down	Class Name	Class Type
1933	Asi	Battleship
1933	Imulhu	Battleship
1931.5	Wirozag XIV	Battleship
1931	Frawar	Coast Battleship
1931	Afson	Flight Deck Carrier
1931	Gurdishskarag	Flight Deck Armored Carrier
1931	Baskuc	Flight Deck Armored Carrier
1932	Charmosh III	Flight Deck Carrier
1932	Dahae	Heavy Armored Cruiser
1932	Haminka	Armored Cruiser
1932	Nimasp	Armored Cruiser
1931	Brazsinag	Armored Cruiser
1931	Wadsab	Armored Cruiser
1932	Saka V	Light Armored Cruiser
1932	Pouseki XVII	Cruiser
1932	Atossa D	Frigate
1931.5	Sher	Corvette
1931.5	Drayapanag	Sloop

Kaiser Kirk · March 10, 2024, 03:22:26 PM

The Rubara Class ...was a mistake.

I had the notion I could make destroyer leaders that had sufficient Fleet Supply Value to supply a destroyer squadron.
For the Expansion days, when ports with infrastructure were lacking, this seemed a great idea.
So I built 3... and somewhere about then figured out I had failed at number crunching, having provided FSV for 600tons of DDs, not 6000tons. Which rather eliminated the intended mission of the ship. Instead theyconceptually became MTB tenders...for a small MTB squadron. The original design provided for torpedo storage, so that seemed reasonable.
But now my MTB harbors mostly have 50m docks and all have 2 IC.

So, 20 years later..scrap or refurbish.
The old Dolphin are worthless and so replacing those 4 with these 3 seems reasonable.

Using the 165mm gun gives both the ability to hurt a marauding destroyer or cruiser,
or conduct shore bombardment missions. This is supplemented by the 163mm Howitzer.
By keeping to single mountings, Power Assist can be avoided.

Quote
Rubara Ref31, Parthian Patrol Frigate laid down 1910 (Engine 1931)

Displacement:
   2,985 t light; 3,136 t standard; 3,604 t normal; 3,979 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (392.57 ft / 383.86 ft) x 45.11 ft x (17.06 / 18.27 ft)
   (119.65 m / 117.00 m) x 13.75 m x (5.20 / 5.57 m)

Armament:
3 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 140 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
1 - 6.42" / 163 mm 21.0 cal gun - 154.32lbs / 70.00kg shells, 140 per gun
     Quick firing gun in deck and hoist mount, 1921 Model
     1 x Single mount on sides, forward deck aft
      1 raised mount
16 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 1,200 per gun
     Quick firing guns in deck mounts, 1929 Model
     4 x 2 row quad mounts on side ends, evenly spread
12 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
     Breech loading guns in deck mounts, 1927 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
     2 x Twin mounts on centreline ends, evenly spread
      2 double raised mounts
Weight of broadside 617 lbs / 280 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.18" / 30 mm   326.28 ft / 99.45 m   12.01 ft / 3.66 m
   Ends:   Unarmoured
     Main Belt covers 131 % 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:   0.98" / 25 mm   0.98" / 25 mm      0.98" / 25 mm
   2nd:   0.31" / 8 mm   0.31" / 8 mm      0.31" / 8 mm
   3rd:   0.31" / 8 mm     -           -

- Protected deck - single deck:
   For and Aft decks: 1.77" / 45 mm
   Forecastle: 0.79" / 20 mm Quarter deck: 0.79" / 20 mm

- Conning towers: Forward 0.79" / 20 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 26,701 shp / 19,919 Kw = 27.00 kts
   Range 5,790nm at 16.00 kts
   Bunker at max displacement = 843 tons

Complement:
   232 - 302

Cost:
   £0.262 million / $1.046 million

Distribution of weights at normal displacement:
   Armament: 136 tons, 3.8 %
     - Guns: 136 tons, 3.8 %
   Armour: 566 tons, 15.7 %
     - Belts: 182 tons, 5.1 %
     - Armament: 31 tons, 0.8 %
     - Armour Deck: 349 tons, 9.7 %
     - Conning Tower: 4 tons, 0.1 %
   Machinery: 798 tons, 22.2 %
   Hull, fittings & equipment: 1,148 tons, 31.8 %
   Fuel, ammunition & stores: 619 tons, 17.2 %
   Miscellaneous weights: 337 tons, 9.4 %
     - Hull below water: 35 tons
     - Hull void weights: 40 tons
     - Hull above water: 67 tons
     - On freeboard deck: 67 tons
     - Above deck: 128 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,131 lbs / 1,874 Kg = 30.1 x 6.5 " / 165 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 1.7 ft / 0.5 m
   Roll period: 14.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.47
   Seaboat quality (Average = 1.00): 1.09

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.427 / 0.440
   Length to Beam Ratio: 8.51 : 1
   'Natural speed' for length: 19.59 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   Bow angle (Positive = bow angles forward): 22.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   10.00 %, 21.56 ft / 6.57 m, 19.16 ft / 5.84 m
     - Forward deck:   30.00 %, 19.16 ft / 5.84 m, 19.16 ft / 5.84 m
     - Aft deck:   55.00 %, 10.96 ft / 3.34 m, 10.96 ft / 3.34 m
     - Quarter deck:   5.00 %, 10.96 ft / 3.34 m, 10.96 ft / 3.34 m
     - Average freeboard:      14.33 ft / 4.37 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 88.4 %
      - Above water (accommodation/working, high = better): 123.4 %
   Waterplane Area: 10,850 Square feet or 1,008 Square metres
   Displacement factor (Displacement / loading): 123 %
   Structure weight / hull surface area: 68 lbs/sq ft or 333 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.83
      - Longitudinal: 1.85
      - Overall: 0.90
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

1931 refurbishment of the 1910 Rubara class.
Basically converting it to an Erie class Gunboat to supplement the maritime patrol fleet, which is the current role. .

Like many Parthian gunboats, it fits a howitzer to supplement the main guns for shore bombardment.

Refurbishment Base Cost : 3*.2= $0.6

original engines : 1291
original bunker : 843

A)
New Guns : 136
New Engines : 798

Subtotal : $1.864, 0.934

B)
New armor : 31+152 : 183
New Func Misc Wt : 205

Subtotal : $ 0.388, 0.388 BP

C) N/A

D)
New mag : 77t
New bunker : 843

Subtotal :$ 0.4615

Total : $3.3135, 1.322

Misc Wt :40t

AD
14t - Fire Control 1930
14t - Night Fightting
25t - LR Radio
0t - SR Radio
25t - Hulesmeyer Device
50t - Primitive RADAR, aerial direction indicator

OD
5t Paravanes
32t 2TT4 21" 4t
20t Scout floatplane
5t - Gunpowder Cat
5t - Hanger

HAW
3t - CO2 Cmpressor AC
3t - Extra Fire Ext
64t - Marines

HBW
3t - Extra Pumps
32t - Torpedo reloads

Originally a Destroyer Leader, in 1931 they were converted to be Gunboats.

The protected deck was 25mm on the flat and 55mm on the slopes over the citadel
An additional 20mm was laminated on top in 1931, giving 45/75 over the citadel,
but only an effective thickness of 41/71.

Range is 21 days at 12knots with a 10% reserve
This is a week more than the vessel is expected to need, but the extra fuel is to allow an emergency reserve for her associated Destroyers.

Kaiser Kirk · March 10, 2024, 03:30:39 PM

For the :
Enki
Gilgamesh
Stormbringer
Vazyra
Classes, they all had the 1929-30 Basic AA Refit, now the intent is to upgrade the FC from 1918 to 1930 and add 50t for the primitive RADAR. I can post the SSs if anyone wants.

As I don't want to have my Battlewagons all out of service at once, I can only upgrade part of the fleet at a time.

Kaiser Kirk · March 10, 2024, 03:35:34 PM

For the Wirozag class, it is close to finished so I can do the "Free Basic Refit" per the construction rules and complete it with the 1930 Fire Control and new Secondary/Tertiary and RADAR.

Quote
Shipbuilding Technology

The technology used in a ship must be completed prior to the half-year in which the ship itself is laid down. This is applicable to everything governed by tech research. Once the laid down, the design may not be changed until it is completed with one exception.

Ships can undergo a Basic Refit when the hull is 75% completed for no additional cost or modification to construction time.

Wirozag
Received free basic refit while building
471t- replaced 130mm AS with DP 471
146t - replaced 57mm with 37mm 146
22t - replaced 15mm with 23mm 22
50t - Primitive RADAR added
435t - 1930 FC updated.
-----
1104

138
87

Quote
Wirozag BR31, Parthian Battleship laid down 1928

Displacement:
   38,000 t light; 40,568 t standard; 43,024 t normal; 44,989 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (623.07 ft / 616.80 ft) x 114.83 ft (Bulges 124.67 ft) x (31.33 / 32.63 ft)
   (189.91 m / 188.00 m) x 35.00 m (Bulges 38.00 m) x (9.55 / 9.95 m)

Armament:
10 - 15.35" / 390 mm 46.0 cal guns - 1,915.82lbs / 869.00kg shells, 134 per gun
     Breech loading guns in turret on barbette mounts, 1928 Model
     2 x 3-gun mounts on centreline ends, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
16 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 220 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     8 x 2-gun mounts on sides, evenly spread
16 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 405 per gun
     Anti-air guns in deck and hoist mounts, 1929 Model
     6 x 2-gun 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, 2,400 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
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 4,750 per gun
     Machine guns in deck mounts, 1929 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
Weight of broadside 20,710 lbs / 9,394 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   400.92 ft / 122.20 m   13.88 ft / 4.23 m
   Ends:   1.57" / 40 mm   215.85 ft / 65.79 m   14.76 ft / 4.50 m
     Main Belt covers 100 % of normal length
     Main Belt inclined -12.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   400.92 ft / 122.20 m   34.74 ft / 10.59 m
   Beam between torpedo bulkheads 78.74 ft / 24.00 m

- Hull Bulges:
      0.35" / 9 mm   400.92 ft / 122.20 m   21.49 ft / 6.55 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   17.1" / 435 mm   7.09" / 180 mm      13.4" / 340 mm
   2nd:   1.97" / 50 mm   1.57" / 40 mm      1.57" / 40 mm
   3rd:   0.59" / 15 mm   0.31" / 8 mm      0.31" / 8 mm
   4th:   0.31" / 8 mm     -           -
   5th:   0.31" / 8 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 5.50" / 140 mm
   Forecastle: 1.57" / 40 mm Quarter deck: 5.31" / 135 mm

- Conning towers: Forward 14.96" / 380 mm, Aft 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 104,439 shp / 77,912 Kw = 26.00 kts
   Range 8,680nm at 14.00 kts
   Bunker at max displacement = 4,422 tons

Complement:
   1,493 - 1,941

Cost:
   £14.263 million / $57.050 million

Distribution of weights at normal displacement:
   Armament: 4,344 tons, 10.1 %
     - Guns: 4,344 tons, 10.1 %
   Armour: 14,761 tons, 34.3 %
     - Belts: 3,638 tons, 8.5 %
     - Torpedo bulkhead: 1,157 tons, 2.7 %
     - Bulges: 113 tons, 0.3 %
     - Armament: 4,340 tons, 10.1 %
     - Armour Deck: 5,077 tons, 11.8 %
     - Conning Towers: 437 tons, 1.0 %
   Machinery: 3,252 tons, 7.6 %
   Hull, fittings & equipment: 14,550 tons, 33.8 %
   Fuel, ammunition & stores: 5,024 tons, 11.7 %
   Miscellaneous weights: 1,093 tons, 2.5 %
     - Hull below water: 254 tons
     - Bulge void weights: 125 tons
     - Hull above water: 76 tons
     - On freeboard deck: 70 tons
     - Above deck: 568 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     62,330 lbs / 28,272 Kg = 34.4 x 15.4 " / 390 mm shells or 11.5 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 7.8 ft / 2.4 m
   Roll period: 18.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.55
   Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a round stern
   Block coefficient (normal/deep): 0.625 / 0.628
   Length to Beam Ratio: 4.95 : 1
   'Natural speed' for length: 24.84 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   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 %, 29.53 ft / 9.00 m, 29.53 ft / 9.00 m
     - Forward deck:   25.00 %, 29.53 ft / 9.00 m, 29.53 ft / 9.00 m
     - Aft deck:   40.00 %, 21.33 ft / 6.50 m, 21.33 ft / 6.50 m
     - Quarter deck:   15.00 %, 21.33 ft / 6.50 m, 22.31 ft / 6.80 m
     - Average freeboard:      25.09 ft / 7.65 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.2 %
      - Above water (accommodation/working, high = better): 165.6 %
   Waterplane Area: 53,021 Square feet or 4,926 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 225 lbs/sq ft or 1,099 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 1.95
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Meant to operate with the Stormbringer vessels, or stand in line of battle, it is given heavy armor and sufficient speed to exceed the Byzantine line, and many battlewagons.

The high cruise speed and good range at that speed is meant to allow operations backing the cruiser screen.

Tonnage is kept at 38000 tons to allow a reasonable building time, and to keep tonnage in reason.

This does mean that the number of barrels is restricted to a paltry 10

The reality of the newest Roman vessels combination of full dreadnaught ability with cruiser speed has not been understood at the time it is laid down.

Deck Guns
Deck guns are echloned outwards, like on Iowa,
allowing 4 to bear ahead (8 guns), or 4 on each side.
The 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
Belt
1) Figure adjusted height for wedge
2) figure additional belt height for outsloping

Step 1
The bet covers from 1.5m to -3m.
The lower portion of the belt tapers.
The upper 2.0m is a uniform 350mm, extending 0.5m below WL.
the lower 2.5m tapers from 350mm down to 230mm.
The bulge extends from the lower edge of the belt to the keel.
The TDS rises behind the belt and seals to the armor deck, adding
57mm behind it.

Mathwise that means there are 3 sections.
| |
| | A ) Upper, 2000mm (2.0m) x 350mm
\ | |
\| | C) Lower back , 2500 (2.5m) x 230mm
B) Wedge 1/2 B x H :
B = 2.5m = 2500
H = 350-230 = 120
B = 2500/2 * 120= 150000

A) = 700,000
B) = 150,000
C) = 575,000

SubTotal : 1,425,000
Modeled as average 350mm thickness = /350
Total : 4071.428= 4.08m

Main Belt is outsloped by 15%.

Step 2 Outsloping
Overall it is 4.08m high. which is "A" or adjacent

COS 15 = A/H
H* Cos 15 = A
H = A/Cos 15

Which gives 4.2239 or 4.23 as the height.

4.7 wt : 3845
4.23 wt : 3461
384 difference

End Belts are not outsloped,

Deck Armor
Deck Armored is modeled as two parts
A 40/135/135 main armored deck : 4928 tons
and a 50mm box around the magazines : 148 tons
TOTAL : 5076

To model that, the deck thickness is shown as
40/ 139.7 /135
Which weighs 5077t

Which means vertical is a 130mm 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, with the End belts extending from +1.5 above (level with crown) to -3m below, keeping the outer shell free of splinter holes, and effectively reinforcing the area around any large shell hole.

TDS
Raised to the underside of the Armor deck at 1.5m above waterline. Serves as internal splinter belt.

TDS :
9mm mild hull || 1.5m Bulge ||9mm mild hull||
1.5m liquid ||9mm mild||, 1m void ||9mm mild||, 1.5m liquid || armored (2x19=38mm)||,1.5m Dam control/ flooding ||( 19mm Armored )||

Depth : 1.5m exterior, 4m interior to main bulkhead, 1.5m to second bulkhead. Total :7m, 57mm STS steel

150t Reserve Wt

AD
433t Fire Control 1930
25t LR Radio
25t Searchlight Tower (NF)
25t Hulesmeyer prox detector
50t - Primitive RADAR, Long Range Airborne Directional Indicaor
10t SR Radio for AC
0t SR Radio

OD
5t : Paravanes
25t +5t : Fighter/Scout floatplane + Gunpowder Cat
25t +5t : Fighter/Scout floatplane + Gunpowder Cat
10t : Hanger
5t : Fire Ext for hanger.

HAW
38t Additional fire suppresion
38t CO2 Air conditioning

HBW
38t Extra pumps
188t torpedo nets
10t : (1+9) 1t double wall tanks 9t AVGAS+Aviation supplies
5t : Fire ext for Avgas.
13t : Aux Diesel Generator, 10x1.3=13t, 244kw
Last 30nm range = Diesel fuel

Decks
+6.5 Weather Deck
+4.00 Battery Deck
+1.5 Armor Deck 130mm , top of TDS.
-1.0 3rd Deck
-3.0 bottom main belt , top bulge
-3.5 2nd Deck
-8.0 Engineering
-9.09 Double Bottom

Kaiser Kirk · March 10, 2024, 03:43:38 PM

Like the Wirozag, the Dahaes are nearly completed and so ready for the free refit.

For both vessels, I strongly considered delaying completion until 1931.5 and
converting both the 130 and 90 mm batteries to 2G and 1G 115mm DP.

I think that might be a future refit when true DP is available, but right now the mixed battery makes sense,
and simply improving the mountings used to HA/LA is more reasonable than going all in on the new 115L47.

BR 1931
363t 130mm -> DP
195t 90mm -> DP
18t Add Quad 37mm
5.8t 15mm -> 23mm
222t Replace FC 1918 with FC 1930
50t Install the new RADAR
----
853.8t

Quote
Dahae, Parthian Heavy Armored Cruiser laid down 1928

Displacement:
   24,474 t light; 26,072 t standard; 28,668 t normal; 30,744 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (590.55 ft / 583.99 ft) x 95.14 ft (Bulges 101.71 ft) x (31.17 / 33.06 ft)
   (180.00 m / 178.00 m) x 29.00 m (Bulges 31.00 m) x (9.50 / 10.08 m)

Armament:
8 - 13.11" / 333 mm 43.0 cal guns - 1,333.80lbs / 605.00kg shells, 130 per gun
     Breech loading guns in turret on barbette mounts, 1928 Model
     2 x 4-gun mounts on centreline ends, evenly spread
12 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 250 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     4 x 2-gun mounts on sides, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
16 - 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 2-gun mounts on sides, evenly spread
      6 raised mounts
     2 x 2-gun mounts on sides, forward deck centre
      2 double raised mounts
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 2,600 per gun
     Machine guns in deck mounts, 1929 Model
     6 x Twin mounts on sides, evenly spread
      6 raised mounts
     2 x Twin 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
Weight of broadside 11,940 lbs / 5,416 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   10.0" / 255 mm   397.11 ft / 121.04 m   12.93 ft / 3.94 m
   Ends:   1.57" / 40 mm   186.84 ft / 56.95 m   12.93 ft / 3.94 m
     Main Belt covers 105 % of normal length
     Main Belt inclined -12.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   397.11 ft / 121.04 m   34.35 ft / 10.47 m
   Beam between torpedo bulkheads 68.90 ft / 21.00 m

- Hull Bulges:
      0.35" / 9 mm   422.83 ft / 128.88 m   24.61 ft / 7.50 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   7.09" / 180 mm      9.06" / 230 mm
   2nd:   2.95" / 75 mm   1.57" / 40 mm      2.76" / 70 mm
   3rd:   1.38" / 35 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   0.31" / 8 mm     -           -
   5th:   0.31" / 8 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 4.13" / 105 mm
   Forecastle: 1.57" / 40 mm Quarter deck: 3.94" / 100 mm

- Conning towers: Forward 11.02" / 280 mm, Aft 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 5 shafts, 121,195 shp / 90,412 Kw = 29.00 kts
   Range 9,008nm at 16.00 kts
   Bunker at max displacement = 4,672 tons

Complement:
   1,101 - 1,432

Cost:
   £8.827 million / $35.309 million

Distribution of weights at normal displacement:
   Armament: 2,217 tons, 7.7 %
     - Guns: 2,217 tons, 7.7 %
   Armour: 8,114 tons, 28.3 %
     - Belts: 2,361 tons, 8.2 %
     - Torpedo bulkhead: 1,133 tons, 4.0 %
     - Bulges: 136 tons, 0.5 %
     - Armament: 1,434 tons, 5.0 %
     - Armour Deck: 2,794 tons, 9.7 %
     - Conning Towers: 254 tons, 0.9 %
   Machinery: 3,773 tons, 13.2 %
   Hull, fittings & equipment: 9,554 tons, 33.3 %
   Fuel, ammunition & stores: 4,193 tons, 14.6 %
   Miscellaneous weights: 816 tons, 2.8 %
     - Hull below water: 228 tons
     - Bulge void weights: 150 tons
     - Hull above water: 50 tons
     - On freeboard deck: 85 tons
     - Above deck: 303 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     38,450 lbs / 17,441 Kg = 34.1 x 13.1 " / 333 mm shells or 6.6 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 6.2 ft / 1.9 m
   Roll period: 17.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.55
   Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.542 / 0.548
   Length to Beam Ratio: 5.74 : 1
   'Natural speed' for length: 24.17 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   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 %, 27.23 ft / 8.30 m, 25.59 ft / 7.80 m
     - Forward deck:   28.00 %, 25.59 ft / 7.80 m, 22.31 ft / 6.80 m
     - Aft deck:   40.00 %, 22.31 ft / 6.80 m, 22.31 ft / 6.80 m
     - Quarter deck:   12.00 %, 22.31 ft / 6.80 m, 22.31 ft / 6.80 m
     - Average freeboard:      23.56 ft / 7.18 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 103.8 %
      - Above water (accommodation/working, high = better): 153.0 %
   Waterplane Area: 38,488 Square feet or 3,576 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 185 lbs/sq ft or 903 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.29
      - Overall: 0.99
   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

Named for the Dahae Confederation, of which the Parni tribe was a member.
Meant to provide a counter for the older Byzatine nad Japanese vessels of this type,

Guns
The 333L43 is featured
90
130
Guns For/Aft are tiered 333

Armor[/u
Main belt is outslope is -15degrees.
Belt from 1.8m to -2m (3.8), sloped 15% outward.
3.8/cos (15) = 3.934 = 3.94

57mm TDS rises behind belt to seal to armor deck,
Forming 57mm splinter armor behind belt.

Total effective strength : 283.5

Deck Armor :
40/ 100/ 100m deck : 2,676t
50mm box over magazines : 112t

Modeled as 40/104.8/100 : 2790t

TDS : Total 5m deep, 57mm STS
Exterior Bulge for Standoff Distance : -2m to -9.5
Bulge 1m deep
TDS set 4m inside of hull
1.5 liquid, 1.0 void, 19mm STS, 1.5 liquid, twinned 19mm STS platees
Total depth 5m

Misc Wt :
Reserve
80t

AD
222t - FC 1930
25t - Searchlight Tower (NF)
25t - LR Radio
10 - dedicated AC SR radio
0t - SR Radio
25t - Hulesmeyer directional device
50t - Primitive RADAR -aerial direction indicator

OD
5t - Paravanes
50t - 4x Fighter or Scout (2/2 normal) Floatplanes
10t - 2x Gunpowder Cat
20t - Hanger

HAW
25t - CO2 Air Compressor AC
25t - Enhanced Fire Suppression

HBW
25t - Enhanced Pumps
178t - Torpedo nets
12t - 1+9+2 - Double wall tank (1) + AVGAS (5) + munitions (2)
2t : Enhanced fire suppression for AC supplies

Aux :
65.1t : (42x1.55) Aux Diesel-Electric 1005kw Gen, drives 5th (center) shaft at up to 8knots.
8nm of fuel is Diesel. This is 4tons, or ~13440gal.

Decks
9.4 - Forecastle
6.9 - Weather
4.1 - Battery
1.6 - Main Armor Deck, top TDS, Top Main Belt
-0.9 - Deck
- 2.0 Bottom Main Belt.
-3.4 - Deck
-6.9 - Engineering
-8.22 - Double Bottom

The Rock Doctor · March 10, 2024, 05:27:58 PM

I was contemplating 25 t for radar, myself.

Glad I'm not the only one who made expansion-era mistakes...

TacCovert4 · March 10, 2024, 06:30:58 PM

Quote from: The Rock Doctor on March 10, 2024, 05:27:58 PM
I was contemplating 25 t for radar, myself.

Glad I'm not the only one who made expansion-era mistakes...

I think in a future refit Era lighter radars will be a thing. But not the first gen at least. I won't be putting radar on my ships until it gets lighter and more reliable that'll be one of my issues.

For now the RAN will rely on really good optical, air spotting, and shore based radar.

Kaiser Kirk · March 14, 2024, 06:23:01 PM

Actually came to post the Royn class Oiler,

but...

Looking at the next NF tech :
Improved search RADAR. These would be the first shipboard mounts

So...I won't be mounting any Radar- I don't have that 1934, I have 1930.

Whoops.

This part of the post is now a little obsolete :
50t is what I am using as the Tech description is Large and crude.
which implies follow on sets will be less bulky.

Long term, I expect there will be different types of sets
-Air Search
-Sea Search
-Fire Control

25 tons for each wouldn't be crippling, but I'd like to spend some time looking at my books and see if I can tease out some more accurate weights.

One interesting thing I was reading in one of the Navweaps articles is that the generators were run by steam bled off the engines, so the more electronics being used, the more effect on SHP available....really don't know how to SIM that.
I had ships for a bit with 0.1 extra knot, and was tinkering with 1000kw extra, I may go back to that to create an allowance.
Though it's really to 'nitty gritty' to focus on during a battle.

Sometimes these things can be surprising. Foxy was quite certain early radios were not 25tons - and was of course correct- but once you start figuring in they needed masts and antennae and spares and berthing, it may not have been so far off.
Speaking of radios, their ranges will have increased. I need to pin that down..but TIME..

Quote from: TacCovert4 on March 10, 2024, 06:30:58 PM

For now the RAN will rely on really good optical, air spotting, and shore based radar.

The Parthians have tried hard to be good at detection as well.

I think these early sets have limited utility.
...though more than the War Tubas I fielded did...

Having these in service on a variety of ships will give Parthia experience on how lavishly they want to deploy them.
Frankly I don't have the reserve tonnage to mount them throughout the fleet, but since I have to do AA and FC refits,
I'll be slotting them in where I've got tonnage to spare.

Kaiser Kirk · March 14, 2024, 10:27:34 PM

Since I can't fit RADAR on ships yet, I'll just convert that reserve weight that became functional weight back into reserve weight.

In the meantime, finalizing my turn I realized that I don't think I published my new fleet oiler yet.

Between the hand-waved mercantile fleet, and presuming N7 oil sources are similar (everyone has "sufficient" for the Navy in the Homeland somewhere) then Parthia and it's territories probably export a plurality of the world's oil.

So....for normal operations I really should have no problems bringing tankers into naval service and ensuring whichever bases need oil/gas, they have it.

BUT...ensuring sufficient tankers, with sufficient cruise speed, are in the right place at the right time to refuel the battlefleet at sea might be more of a problem.

So with out further ado - the Royn...which means 'Oil'.

Quote
Royn "Oil" III, Parthian Fleet Oiler laid down 1931

Displacement:
   14,880 t light; 15,585 t standard; 16,861 t normal; 17,883 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (462.37 ft / 452.76 ft) x 90.55 ft x (21.33 / 22.44 ft)
   (140.93 m / 138.00 m) x 27.60 m x (6.50 / 6.84 m)

Armament:
4 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 300 per gun
     Dual purpose guns in deck mounts, 1929 Model
     2 x 2-gun mounts on centreline ends, evenly spread
12 - 1.18" / 30.0 mm 80.0 cal guns - 55.12lbs / 25.00kg shells, 900 per gun
     Dual purpose guns in deck and hoist mounts, 1929 Model
     4 x 2-gun mounts on side ends, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
Weight of broadside 882 lbs / 400 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.31" / 8 mm     -           -
   2nd:   0.31" / 8 mm     -           -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 20,259 shp / 15,113 Kw = 19.21 kts
   Range 5,595nm at 16.00 kts
   Bunker at max displacement = 2,298 tons

Complement:
   739 - 961

Cost:
   £2.697 million / $10.790 million

Distribution of weights at normal displacement:
   Armament: 47 tons, 0.3 %
     - Guns: 47 tons, 0.3 %
   Armour: 7 tons, 0.0 %
     - Armament: 7 tons, 0.0 %
   Machinery: 606 tons, 3.6 %
   Hull, fittings & equipment: 3,925 tons, 23.3 %
   Fuel, ammunition & stores: 1,981 tons, 11.8 %
   Miscellaneous weights: 10,295 tons, 61.1 %
     - Hull below water: 10,141 tons
     - Hull void weights: 44 tons
     - Hull above water: 40 tons
     - On freeboard deck: 40 tons
     - Above deck: 30 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     32,601 lbs / 14,788 Kg = 618.3 x 4.7 " / 120 mm shells or 3.0 torpedoes
   Stability (Unstable if below 1.00): 2.91
   Metacentric height 20.8 ft / 6.3 m
   Roll period: 8.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.02
   Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck ,
     a ram bow and a round stern
   Block coefficient (normal/deep): 0.675 / 0.680
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 21.28 kts
   Power going to wave formation at top speed: 49 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 15.00 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 %, 23.62 ft / 7.20 m, 23.62 ft / 7.20 m
     - Forward deck:   30.00 %, 15.42 ft / 4.70 m, 15.42 ft / 4.70 m
     - Aft deck:   30.00 %, 15.42 ft / 4.70 m, 15.42 ft / 4.70 m
     - Quarter deck:   20.00 %, 23.62 ft / 7.20 m, 23.62 ft / 7.20 m
     - Average freeboard:      18.70 ft / 5.70 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 80.8 %
      - Above water (accommodation/working, high = better): 127.7 %
   Waterplane Area: 32,130 Square feet or 2,985 Square metres
   Displacement factor (Displacement / loading): 145 %
   Structure weight / hull surface area: 95 lbs/sq ft or 465 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.56
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Royn "Oil" is a naval auxiliary tanker.

Designed to be able to fit in the merchant docks in the Pacific, max of 141m.
Designed with a shallow draf to fit almost any port, military or civilian.

This fleet oiler auxiliary is meant to be able to keep up with the battleline over strategic spaces. Maximum speed is designed to let it cruise on 1/2power.
7553*2 = 15106hp needed

Range IS 5595 *1.15 = 6434

Tonnage is meant to complete within 2 years, and
tt 15,000 tons, it takes 24 months to completion.
But can be launched after 9.6 months, allowing docks to be prepped for the next vessel.

Maximum displacement would be 11 months in dock +1 to clear the dock, which would be
11/0.4 = 27.5 months
27.5-9 = 18.5 = 18,500 tons light disp.

While there are economies of scale with larger vessels,
that also makes their loss more difficult.

With 10,000 tons of bunker oil, any two battleships can fully refuel from one tanker.

Ams & Armor
Normal : 17036 * 0.02 = 340t arms & armor
Guns & Armor : 54
Torpedo nets : 141

Total : 195

Misc Wt :
44t - Reserves

AD
5t - FC 1930
25t - LR Radio
0t - SR Radio

OD
40t - 2x 20t Motor launches

HAW
25t - Add Fire Suppresion gear
15t - CO2 Compressor AC

HBW
141t - Torpedo Nets
10,000 - Fuel Oil for Replenishment

Kaiser Kirk · March 17, 2024, 02:30:22 PM

1931.5
The Refits Continue...

Quote

Continuing refits for 1930 fire control is a priority for the Battlewagons and Armored Cruisers that can use it.
The elderly Sparabara and Rustam ACs , as well as the "Tortoise" classes are all lower priority for Fire Control.
as they are all due to be scrapped within 5 years. The 'Rohk' will move to Training roles, while Smurgh
will be kept in the Pacific fleet since it can penetrate IJN ships with ease.