Parthian Ships 1928 +

[Kaiser Kirk]

This is just slightly faster, and has a flying off deck.
The belt armor is thinner - still adequate for long range cruiser fire.
The TDS is stronger and there is more fuel loaded.
Just 1 extra aircraft, but 2,000 tons more.

Right now I'd say the 'Burning Bow' and 'Armored Bird of Prey' are my favorites.

Baskuc "Gryphon" , Parthia Fleet Armored Carrier laid down 1933

Displacement:
   28,999 t light; 30,040 t standard; 33,155 t normal; 35,648 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.08 ft / 606.96 ft) x 101.71 ft (Bulges 111.55 ft) x (26.74 / 28.60 ft)
   (189.00 m / 185.00 m) x 31.00 m (Bulges 34.00 m)  x (8.15 / 8.72 m)

Armament:
      24 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 360 per gun
     Dual purpose guns in deck and hoist mounts, 1931 Model
     8 x 4-gun mounts on centreline ends, evenly spread
     4 x 2-gun mounts on sides, forward deck aft
      2 raised mounts - superfiring
      24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 3,000 per gun
     Anti-air guns in deck and hoist mounts, 1929 Model
     6 x 2 row quad mounts on sides, evenly spread
      36 - 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
     10 x Twin mounts on side ends, majority forward
     8 x Twin mounts on sides, forward deck forward
      4 double raised mounts - superfiring
      Weight of broadside 1,380 lbs / 626 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   394.52 ft / 120.25 m   13.58 ft / 4.14 m
   Ends:   Unarmoured
   Upper:   2.36" / 60 mm   394.52 ft / 120.25 m   33.96 ft / 10.35 m
     Main Belt covers 100 % of normal length
     Main Belt inclined -15.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.13" / 54 mm   394.52 ft / 120.25 m   28.87 ft / 8.80 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

   - Hull Bulges:
      0.35" / 9 mm   394.52 ft / 120.25 m   20.18 ft / 6.15 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.38" / 35 mm   0.98" / 25 mm      1.38" / 35 mm
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.31" / 8 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 3.74" / 95 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 2.36" / 60 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 185,330 shp / 138,256 Kw = 31.00 kts
   Range 7,390nm at 18.00 kts
   Bunker at max displacement = 5,608 tons

Complement:
   1,228 - 1,597

Cost:
   £8.976 million / $35.903 million

Distribution of weights at normal displacement:
   Armament: 383 tons, 1.2 %
      - Guns: 383 tons, 1.2 %
   Armour: 6,293 tons, 19.0 %
      - Belts: 2,104 tons, 6.3 %
      - Torpedo bulkhead: 896 tons, 2.7 %
      - Bulges: 104 tons, 0.3 %
      - Armament: 132 tons, 0.4 %
      - Armour Deck: 2,969 tons, 9.0 %
      - Conning Tower: 88 tons, 0.3 %
   Machinery: 5,400 tons, 16.3 %
   Hull, fittings & equipment: 9,937 tons, 30.0 %
   Fuel, ammunition & stores: 4,156 tons, 12.5 %
   Miscellaneous weights: 6,986 tons, 21.1 %
      - Hull below water: 3,270 tons
      - Bulge void weights: 165 tons
      - Hull above water: 3,270 tons
      - On freeboard deck: 103 tons
      - Above deck: 178 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     66,023 lbs / 29,948 Kg = 1,422.8 x 4.5 " / 115 mm shells or 9.0 torpedoes
   Stability (Unstable if below 1.00): 1.51
   Metacentric height 10.3 ft / 3.1 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.06
   Seaboat quality  (Average = 1.00): 1.31

Hull form characteristics:
   Hull has low forecastle,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.641 / 0.644
   Length to Beam Ratio: 5.44 : 1
   'Natural speed' for length: 24.64 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 54
   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:   20.00 %,  22.97 ft / 7.00 m,  22.97 ft / 7.00 m
      - Forward deck:   30.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Aft deck:   35.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Quarter deck:   15.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Average freeboard:      36.09 ft / 11.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 98.5 %
      - Above water (accommodation/working, high = better): 286.4 %
   Waterplane Area: 46,900 Square feet or 4,357 Square metres
   Displacement factor (Displacement / loading): 131 %
   Structure weight / hull surface area: 138 lbs/sq ft or 676 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 2.95
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Parthian Armored Carrier with flying off deck.

Baskuc "Gryphon" a Griffen.
Charmush - Mythological Bird-dog

Intended 1 per fleet, and 2 for Home fleet, 5 in total.

Control Tower
One tower, on the starboard side is fitted.
The tower is designed to be as smooth as possible
so as not to disrupt air flow.

Guns
Fitted with the new 115mm, firing the same size round as the 120mm.
The better sectional density means a flatter, further firing round, more effective
for AA work, while retaining effectiveness against surface targets.

As the historical British carriers, two mounts are mounted on each corner of the deck, for a total of 8. In true Parthian form, they then follow the American practice of two-gun mounts for and aft of the tower. For 4 more.

The 37mm and 23mm alternate down the sides of the deck,
and each side of the tower has 1 twin 23mm on each face at each level.


Airgroup

4,357/65 = 67 planes
67*95= 6365

Armor


Belt
The Armored Carrier is divided into two strakes
The Waterline belt is 100mm covering from +1.0 to -2.0
that 4/cos (15) = 4.1411 = 4.14

The upper portion at 2 inches (50mm) covers from +2.0 to +12.00
where it meets the armored flight deck.
10/cos (15) = 11.3528 = 10.35

The Waterline belt is backed by the splinter protective deck and TDS.
This gives 75 + (35*1.5/2) + (54/2) = 128  before considering the inclined belt.

The waterline is expected to be effective against cruiser weapons down to 15km
The upper hull is expected to exclude bombs/HE/SAP at all ranges, and AP under 20km.

End Belt Fore : Protective deck 35/35  flat/slope
End Belt Stern : Protective Deck 60/60  flat/slope

Deck
60mm Flight Deck at 12m
Proof against cruiser-weapons out to 25km, 1000lb bombs at 10,000ft.

35mm Protective splinter deck at 1m to -1.5m
Proof against splinters up 280mm, resistant to 420mm.

TDS
9mm thin bulge skin
1.5m fuel filled bulge
Mild steel hull
1.5m fuel filled
19mm STS Bulkhead
1.5m void filled
35mm Holding Bulkhead

The TDS rises to meet the bottom of the Protective Splinter at 1m


Miscellaneous Weight
160t - Reserve

AD
39t  - Fire Control 1930
25t -  Long Range Radio
0t   -  SR Radio
10t -  SR Radio - CAG
25t - Hulesmeyer
25t - AS Radar
25t -  Squadron Assembly Room.
29t - Vessel Ventilation, intakes

OD
5t   - Paravanes
29t - Vessel Ventilation
40t - 4 x Steam catapults
29t - Extra Fire Extinguisher

HAW
3183- Provisions for 33.5 Aircraft
29t Additional Fire Extinguishers
29t Hanger Ventilation
29t Vessel Ventilation

HBW
3183t - Provisions for 33.5 Aircraft
29t Hanger Ventilation
29t  Extra Pumps
29t  Extra Fire Ext

Decks
+12.0     Flight Deck - 60mm , top upper belt
+6.50     Hanger Deck
+4.00     3rd Platform Decks Fore/Aft, Central hanger Space
       +2.0 Top Main Belt, bottom upper belt
+1.00     Lower Hanger Space, Protective Splinter Deck 35mm , Top TDS
-1.50     2nd Platform Deck, Bottom Splinter Deck
       -2.0  Bottom of Armor Belt, top bulge
-4.00       1st Platform Deck
-7.00       Engineering
-7.80       Double Bottom
-8.15         Keel

[The Rock Doctor]

My recollection is that the design guidelines require armored box carriers to have deck armor 150% of the actual thickness - I'm not clear if that's the case here or not.

[TacCovert4]

My recollection is that the design guidelines require armored box carriers to have deck armor 150% of the actual thickness - I'm not clear if that's the case here or not.

Correct on the armor.  Total armor should be 125mm to reflect a 60mm flight deck with a 35mm hangar deck

[Kaiser Kirk]

Yep, looks like I mucked those up.
Well that's why we preview these things,
thanks for the catch.

Funny thing is I can't recall all the permutations to get to those design guidelines, but pretty sure I was the one to come up with them,
unless they were imported from a prior effort.

Both of these are 12m freeboards, which is single hanger, so should only have the 6.5m side,
which will save weight which can go to the deck.

Weights in this era are difficult, as ships like Arethusa replaced hull sheathing with ductile armor steels for their 'belt'. While more expensive, that meant that the weight of the belt armor was offset by the lack of hull metal weight in the same place.

[Kaiser Kirk]

Well looks like I lost a post again... argh.

This is the slightly smaller one- the 'economy' version.
 
The increased deck thickness is offset by basically only paying for half the upper belt height was before. Increased draft to add 500tons and sliced off the fraction of a knot 'solved' the rest.

It's 2000 tons more than the conventional 'Burning Bow' with a slightly smaller airgroup, but is far more survivable.

The problem is the 29,000 ton Bascuk - after it's modifications- is now very similar

Gurdihskarag "Armored Bird of Prey", Parthia Fleet Armored Carrier laid down 1933

Displacement:
   27,500 t light; 28,490 t standard; 30,880 t normal; 32,791 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (673.66 ft / 656.17 ft) x 98.43 ft x (28.41 / 29.84 ft)
   (205.33 m / 200.00 m) x 30.00 m  x (8.66 / 9.10 m)

Armament:
      24 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 360 per gun
     Dual purpose guns in deck and hoist mounts, 1933 Model
     8 x 4-gun mounts on centreline ends, evenly spread
     4 x 2-gun mounts on sides, forward deck aft
      2 raised mounts - superfiring
      24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 2,800 per gun
     Anti-air guns in deck and hoist mounts, 1933 Model
     6 x 2 row quad mounts on sides, evenly spread
      36 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
     Anti-air guns in deck mounts, 1933 Model
     10 x Twin mounts on side ends, majority forward
     8 x Twin mounts layout not set
      4 double raised mounts
      Weight of broadside 1,380 lbs / 626 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.33" / 110 mm   426.51 ft / 130.00 m   10.20 ft / 3.11 m
   Ends:   1.38" / 35 mm   229.63 ft / 69.99 m   12.01 ft / 3.66 m
   Upper:   2.36" / 60 mm   426.51 ft / 130.00 m   18.04 ft / 5.50 m
     Main Belt covers 100 % of normal length
     Main Belt inclined -15.00 degrees (positive = in)

Armored Box Carrier. Protective Deck and TDS behind main belt

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   426.51 ft / 130.00 m   29.95 ft / 9.13 m
   Beam between torpedo bulkheads 68.90 ft / 21.00 m

   - 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:   1.38" / 35 mm   1.38" / 35 mm      1.38" / 35 mm
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.31" / 8 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 5.91" / 150 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 2.56" / 65 mm

Armored Box Carrier - 65mm flight deck, 35mm protective hanger deck at 1m to -1.5m level

   - Conning towers: Forward 5.12" / 130 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 138,693 shp / 103,465 Kw = 30.00 kts
   Range 8,210nm at 16.00 kts
   Bunker at max displacement = 4,301 tons

Complement:
   1,164 - 1,514

Cost:
   £7.828 million / $31.313 million

Distribution of weights at normal displacement:
   Armament: 383 tons, 1.2 %
      - Guns: 383 tons, 1.2 %
   Armour: 7,284 tons, 23.6 %
      - Belts: 1,747 tons, 5.7 %
      - Torpedo bulkhead: 744 tons, 2.4 %
      - Armament: 170 tons, 0.5 %
      - Armour Deck: 4,514 tons, 14.6 %
      - Conning Tower: 109 tons, 0.4 %
   Machinery: 4,041 tons, 13.1 %
   Hull, fittings & equipment: 9,981 tons, 32.3 %
   Fuel, ammunition & stores: 3,380 tons, 10.9 %
   Miscellaneous weights: 5,810 tons, 18.8 %
      - Hull below water: 2,681 tons
      - Hull void weights: 190 tons
      - Hull above water: 2,681 tons
      - On freeboard deck: 79 tons
      - Above deck: 179 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     73,183 lbs / 33,195 Kg = 1,577.1 x 4.5 " / 115 mm shells or 9.8 torpedoes
   Stability (Unstable if below 1.00): 1.39
   Metacentric height 8.7 ft / 2.7 m
   Roll period: 14.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0.10
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.589 / 0.595
   Length to Beam Ratio: 6.67 : 1
   'Natural speed' for length: 25.62 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 38
   Bow angle (Positive = bow angles forward): 11.00 degrees
   Stern overhang: 9.84 ft / 3.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Forward deck:   30.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Aft deck:   35.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Quarter deck:   15.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Average freeboard:      39.37 ft / 12.00 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 95.7 %
      - Above water (accommodation/working, high = better): 301.2 %
   Waterplane Area: 46,752 Square feet or 4,343 Square metres
   Displacement factor (Displacement / loading): 138 %
   Structure weight / hull surface area: 128 lbs/sq ft or 626 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.86
      - Longitudinal: 3.61
      - Overall: 1.00
   Adequate 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

Parthian Armored Carrier

Gurdih : Armor
Skarag : Bird of Prey

Intended 1 per fleet, and 2 for Home fleet, 5 in total.

Control Tower
One tower, on the starboard side is fitted.
The tower is designed to be as smooth as possible
so as not to disrupt air flow.

Guns
Fitted with the new 115mm, firing the same size round as the 120mm.
The better sectional density means a flatter, further firing round, more effective
for AA work, while retaining effectiveness against surface targets.

As the historical British carriers, two mounts are mounted on each corner of the deck, for a total of 8. In true Parthian form, they then follow the American practice of two-gun mounts for and aft of the tower. For 4 more.

The 37mm and 23mm alternate down the sides of the deck,
and each side of the tower has 1 twin 23mm on each face at each level.


Airgroup

4343/65 = 66.8 planes
66*80 = 5280

2640 / 2640

Armor


Belt
The Armored Carrier is divided into two strakes
The Waterline belt is 100mm covering from +1.0 to -2.0
that is 3/cos (15) = 3.1058 =3.11

The upper portion at 2.5 inches (60mm) covers from +1.0 to +12.00
where it meets the armored flight deck.


The Waterline belt is backed by the splinter protective deck and TDS.
This gives 110 + (35*1.5/2) + (40/2) = 156  before considering the inclined belt.

End Belt Fore : Protective deck 35/70
End Belt Stern : Protective Deck 45/80

Deck
65mm Flight Deck at 12m

35mm Protective splinter deck at 1m to -1.5m

TDS
A 3m deeep TDS on each side is backed by a heavy 40mm bulkhead.
A simple partition divides the outer 1.5m liquid filled from the interior 1.5m void.

The TDS rises to meet the bottom of the Protective Deck at 1m


Miscellaneous Weight
190t - Reserve

AD
39t  - Fire Control 1930
25t -  Long Range Radio
0t   -  SR Radio
10t -  SR Radio - Deck Operations
10t -  SR Radio - CAG
10t -  RDF
10t -  Radio Jammer
50t -  Squadron Assembly Room.
27t - Vessel Ventilation, intakes

OD
5t   - Paravanes
27t - Vessel Ventilation
20t - 2 x Steam catapults
27t - Extra Fire Extinguisher

HAW
2640- Provisions for 33 Aircraft
27t Additional Fire Extinguishers
27t Hanger Ventilation
27t Vessel Ventilation

HBW
2640t - Provisions for 33 Aircraft
27t Hanger Ventilation
27t  Extra Pumps
27t  Extra Fire Ext

Decks
+12.0     Flight Deck - 65mm , top upper belt
+6.00     Lower Hanger Deck
+3.50     Battery Deck
+1.00     Protective Splinter Deck 35mm , Top TDS
-1.50     2nd Platform Deck, Bottom Splinter Deck
       -2.0  Bottom of Armor Belt
-4.00       1st Platform Deck
-7.00       Engineering
-8.13       Double Bottom
-8.66    Keel

[Kaiser Kirk]

This is the revised "Gryphon".

The upper belt height dropped and deck thickness increased by 50%.
Paid for by reducing speed 1 knot, airgroup by 1.
Changed guns from 115L47 with 25kg to 130L47 with 39kg shells.
Increased armor.

Now it's only 1500 tons larger than Gurdihskarag, same speed, same airgroup,
better guns, better armor, better TDS, more survivable overall.

Compared to Charmosh, same airgroup, 6000 tons heavier, the 'cost' of 3 Sher class destroyers.
but overall a much more survivable ship.

Baskuc "Gryphon" , Parthia Armored Box Carrier laid down 1933

Displacement:
   28,996 t light; 30,191 t standard; 33,458 t normal; 36,072 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (623.36 ft / 610.24 ft) x 100.07 ft (Bulges 109.91 ft) x (26.90 / 28.86 ft)
   (190.00 m / 186.00 m) x 30.50 m (Bulges 33.50 m)  x (8.20 / 8.80 m)

Armament:
      24 - 5.12" / 130 mm 47.0 cal guns - 85.98lbs / 39.00kg shells, 360 per gun
     Dual purpose guns in deck and hoist mounts, 1931 Model
     8 x 4-gun mounts on centreline ends, evenly spread
     4 x 2-gun mounts on sides, forward deck aft
      2 raised mounts - superfiring
      24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 3,000 per gun
     Anti-air guns in deck and hoist mounts, 1929 Model
     6 x 2 row quad mounts on sides, evenly spread
      36 - 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
     10 x Twin mounts on side ends, majority forward
     8 x Twin mounts on sides, forward deck forward
      4 double raised mounts - superfiring
      Weight of broadside 2,121 lbs / 962 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.33" / 110 mm   396.65 ft / 120.90 m   13.58 ft / 4.14 m
   Ends:   0.98" / 25 mm   213.55 ft / 65.09 m   12.01 ft / 3.66 m
   Upper:   2.56" / 65 mm   396.65 ft / 120.90 m   18.67 ft / 5.69 m
     Main Belt covers 100 % of normal length
     Main Belt inclined -15.00 degrees (positive = in)

Armored Box Carrier: TDS and protective deck behind main belt


   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.13" / 54 mm   396.65 ft / 120.90 m   29.10 ft / 8.87 m
   Beam between torpedo bulkheads 72.18 ft / 22.00 m

   - Hull Bulges:
      0.35" / 9 mm   394.52 ft / 120.25 m   20.34 ft / 6.20 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.38" / 35 mm   0.98" / 25 mm      1.38" / 35 mm
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.31" / 8 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 5.91" / 150 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 2.56" / 65 mm

Armored Box Carrier :65mm flight deck, 35mm hanger protective deck 1 to -1.5


   - Conning towers: Forward 4.72" / 120 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 161,698 shp / 120,627 Kw = 30.00 kts
   Range 7,736nm at 18.00 kts
   Bunker at max displacement = 5,882 tons

Complement:
   1,236 - 1,608

Cost:
   £8.757 million / $35.030 million

Distribution of weights at normal displacement:
   Armament: 534 tons, 1.6 %
      - Guns: 534 tons, 1.6 %
   Armour: 7,735 tons, 23.1 %
      - Belts: 1,963 tons, 5.9 %
      - Torpedo bulkhead: 908 tons, 2.7 %
      - Bulges: 105 tons, 0.3 %
      - Armament: 144 tons, 0.4 %
      - Armour Deck: 4,509 tons, 13.5 %
      - Conning Tower: 106 tons, 0.3 %
   Machinery: 4,711 tons, 14.1 %
   Hull, fittings & equipment: 9,976 tons, 29.8 %
   Fuel, ammunition & stores: 4,462 tons, 13.3 %
   Miscellaneous weights: 6,040 tons, 18.1 %
      - Hull below water: 2,767 tons
      - Bulge void weights: 210 tons
      - Hull above water: 2,767 tons
      - On freeboard deck: 103 tons
      - Above deck: 193 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     74,188 lbs / 33,651 Kg = 1,106.7 x 5.1 " / 130 mm shells or 10.8 torpedoes
   Stability (Unstable if below 1.00): 1.50
   Metacentric height 10.0 ft / 3.0 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0.10
   Seaboat quality  (Average = 1.00): 1.46

Hull form characteristics:
   Hull has low forecastle,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.649 / 0.652
   Length to Beam Ratio: 5.55 : 1
   'Natural speed' for length: 24.70 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   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:   20.00 %,  22.97 ft / 7.00 m,  22.97 ft / 7.00 m
      - Forward deck:   30.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Aft deck:   35.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Quarter deck:   15.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Average freeboard:      36.09 ft / 11.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 97.9 %
      - Above water (accommodation/working, high = better): 283.6 %
   Waterplane Area: 46,735 Square feet or 4,342 Square metres
   Displacement factor (Displacement / loading): 134 %
   Structure weight / hull surface area: 139 lbs/sq ft or 679 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
   Good seaboat, rides out heavy weather easily

Parthian Armored Carrier with flying off deck.

Armored Box Carrier.
Single Hanger
Decks are 65mm & 35mm splinter.
For 100mm total, modeled as 150mm.

Baskuc "Gryphon" a Griffen.
Charmush - Mythological Bird-dog

Intended 1 per fleet, and 2 for Home fleet, 5 in total.

Control Tower
One tower, on the starboard side is fitted.
The tower is designed to be as smooth as possible
so as not to disrupt air flow.

Guns
Fitted with the new 115mm, firing the same size round as the 120mm.
The better sectional density means a flatter, further firing round, more effective
for AA work, while retaining effectiveness against surface targets.

As the historical British carriers, two mounts are mounted on each corner of the deck, for a total of 8. In true Parthian form, they then follow the American practice of two-gun mounts for and aft of the tower. For 4 more.

The 37mm and 23mm alternate down the sides of the deck,
and each side of the tower has 1 twin 23mm on each face at each level.


Airgroup

Single Armored Hanger.

4,342/65 = 66.8 planes
66*80= 5280

2680 / 2680

Armor


Belt
The Armored Carrier is divided into two strakes
The Waterline belt is 110mm covering from +1.0 to -2.0
that 4/cos (15) = 4.1411 = 4.14

The upper portion at 2 inches (65mm)
covers the hanger at 5.5m high and is outsloped 15deg
5.5/cos(15) = 5.694

The Waterline belt is backed by the splinter protective deck and TDS.
This gives 110 + (35*1.5/2) + (54/2) = 163  before considering the inclined belt.

The waterline is expected to be effective against cruiser weapons down to 15km
The upper hull is expected to exclude bombs/HE/SAP at all ranges, and AP under 20km.

End Belt Fore : Protective deck 35/60   flat/slope
End Belt Stern : Protective Deck 65/90  flat/slope

Deck
65mm Flight Deck at 12m
Proof against cruiser-weapons out to 25km, 1000lb bombs at 10,000ft.

35mm Protective splinter deck at 1m to -1.5m
Proof against splinters up 280mm, resistant to 420mm.


TDS
9mm thin bulge skin
1.5m fuel filled bulge
Mild steel hull
2.25m fuel filled
19mm STS Bulkhead
2.0m void filled
35mm Holding Bulkhead

The TDS rises to meet the bottom of the Protective Splinter at 1m


Miscellaneous Weight
160t - Reserve

AD
54t  - Fire Control 1930
25t -  Long Range Radio
0t   -  SR Radio
10t -  SR Radio - CAG
25t - Hulesmeyer
25t - AS Radar
25t -  Squadron Assembly Room.
29t - Vessel Ventilation, intakes

OD
5t   - Paravanes
29t - Vessel Ventilation
40t - 4 x Steam catapults - two each flight deck
29t - Extra Fire Extinguisher

HAW
2680- Provisions for 33.5 Aircraft
29t Additional Fire Extinguishers
29t Hanger Ventilation
29t Vessel Ventilation

HBW
2680t - Provisions for 33.5 Aircraft
29t Hanger Ventilation
29t  Extra Pumps
29t  Extra Fire Ext

Decks
+12.0     Flight Deck - 60mm , top upper belt
+6.50     Hanger Deck
+4.00     3rd Platform Decks Fore/Aft, Central hanger Space
       +2.0 Top Main Belt, bottom upper belt
+1.00     Lower Hanger Space, Protective Splinter Deck 35mm , Top TDS
-1.50     2nd Platform Deck, Bottom Splinter Deck
       -2.0  Bottom of Armor Belt, top bulge
-4.00       1st Platform Deck
-6.80       Engineering
-7.87       Double Bottom
-8.20         Keel

[Kaiser Kirk]

three bits of unfinished HY1 1933 business
a) refurbishments of the 'Mackerel' class of coastal patrol vessels. 
The current version is the 'Sturgeon' class, meant as active duty patrol vessels.
During wartime these would be leads for Gnat class auxiliary vessels.

b) refurbishment of the 'Whale' class Fleet Supply Vessel.
This slipped through the cracks and is now overdue.

c) re-imagining the armored box carriers to actually fit our rules meant the two were very similar, so I'd like to give it another try.

First, the little coastal patrol vessel.

Mackrel, Parthian Coastal Patrol Cutter laid down 1914

Displacement:
   460 t light; 492 t standard; 562 t normal; 617 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (162.81 ft / 160.76 ft) x 23.79 ft x (8.76 / 9.46 ft)
   (49.63 m / 49.00 m) x 7.25 m  x (2.67 / 2.88 m)

Armament:
      2 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 200 per gun
     Dual purpose guns in deck mounts, 1931 Model
     2 x Single mounts on centreline, forward evenly spread
      1 raised mount
      1 - 4.65" / 118 mm 21.0 cal gun - 59.52lbs / 27.00kg shells, 220 per gun
     Breech loading gun in deck mount, 1927 Model
     1 x Single mount on centreline, aft deck forward
      1 raised mount
      4 - 0.91" / 23.0 mm 80.0 cal guns - 0.42lbs / 0.19kg shells, 1,200 per gun
     Anti-air guns in deck mounts, 1929 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 171 lbs / 78 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.98" / 25 mm   101.80 ft / 31.03 m   3.28 ft / 1.00 m
   Ends:   Unarmoured
   Upper:   0.98" / 25 mm   101.80 ft / 31.03 m   6.89 ft / 2.10 m
     Main Belt covers 97 % 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         -               -

   - Protected deck - single deck:
   For and Aft decks: 0.59" / 15 mm

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

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 2,016 ihp / 1,504 Kw = 16.84 kts
   Range 4,400nm at 10.00 kts
   Bunker at max displacement = 125 tons (23% coal)

Complement:
   57 - 75

Cost:
   £0.050 million / $0.201 million

Distribution of weights at normal displacement:
   Armament: 23 tons, 4.1 %
      - Guns: 23 tons, 4.1 %
   Armour: 72 tons, 12.9 %
      - Belts: 44 tons, 7.9 %
      - Armament: 2 tons, 0.4 %
      - Armour Deck: 24 tons, 4.4 %
      - Conning Tower: 1 tons, 0.3 %
   Machinery: 123 tons, 21.9 %
   Hull, fittings & equipment: 144 tons, 25.6 %
   Fuel, ammunition & stores: 101 tons, 18.1 %
   Miscellaneous weights: 98 tons, 17.4 %
      - Hull void weights: 2 tons
      - Hull above water: 32 tons
      - On freeboard deck: 36 tons
      - Above deck: 28 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     636 lbs / 288 Kg = 13.7 x 4.5 " / 115 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 12.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.70
   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): 0.587 / 0.597
   Length to Beam Ratio: 6.76 : 1
   'Natural speed' for length: 12.68 kts
   Power going to wave formation at top speed: 63 %
   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:   25.00 %,  11.65 ft / 3.55 m,  9.84 ft / 3.00 m
      - Forward deck:   31.00 %,  9.84 ft / 3.00 m,  8.37 ft / 2.55 m
      - Aft deck:   32.00 %,  8.37 ft / 2.55 m,  8.37 ft / 2.55 m
      - Quarter deck:   12.00 %,  8.37 ft / 2.55 m,  8.69 ft / 2.65 m
      - Average freeboard:      9.16 ft / 2.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90.9 %
      - Above water (accommodation/working, high = better): 80.6 %
   Waterplane Area: 2,763 Square feet or 257 Square metres
   Displacement factor (Displacement / loading): 118 %
   Structure weight / hull surface area: 33 lbs/sq ft or 161 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.77
      - Longitudinal: 3.43
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate 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

1914 Mackrel Class Refurbishment
original guns : 27
original ammo :  21

Replace 120mm with 115mm
Replace 118 How with 118L21 How
Replace 15mm with 23mm

23t guns
21t mags
2t armor
2.3tNew FC
0t - New SR radio

Base : 0.092
Guns + Mach:  0.046, 0.023
Armor + Func : 0.0043, 0.0043
Hull, etc :
NF misc, fuel, mags : 0.00105
-----
0.14335
0.0.0273

The Coastal Patrol vessel is equipped with
a pair of 120mm guns forward.
Aft, a 118mm HOW is mounted in X, well clear of the equipment on the aft deck.
Four old twin Gardner 15mm handcranked MGs provide dock security.

Armor :
0.5 to 2.6 : Upperbelt covers from weather deck down to waterline.
0.5 to -0.5 : main belt coverage

Misc Weight :
1t Void
0t - 100nm SR radio
3t - 1912 FC
25t - Hulesmeyer remote detection system.
10t - 5t Motor launch, fits 16men (4t)  + engine
1t - Enhanced ventilation
32t - 16 Marines (Section)
25t - Minesweeping gear on aft deck

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

[Kaiser Kirk]

Second the Fleet supply refurbishment.

Whale, Parthian Naval Supply Vessel laid down 1910

Displacement:
   12,000 t light; 12,389 t standard; 16,573 t normal; 19,921 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (481.68 ft / 475.72 ft) x 95.14 ft x (20.51 / 23.96 ft)
   (146.82 m / 145.00 m) x 29.00 m  x (6.25 / 7.30 m)

Armament:
      6 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 240 per gun
     Dual purpose guns in deck mounts, 1929 Model
     2 x Single mounts on centreline ends, evenly spread
     4 x Single mounts on side ends, evenly spread
      16 - 1.18" / 30.0 mm 80.0 cal guns - 0.95lbs / 0.43kg shells, 1,600 per gun
     Anti-air guns in deck mounts, 1929 Model
     2 x 4-gun mounts on centreline ends, evenly spread
      2 raised mounts
     4 x 2-gun mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 346 lbs / 157 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Ends:   Unarmoured

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.50" / 38 mm   232.94 ft / 71.00 m   18.80 ft / 5.73 m
   Beam between torpedo bulkheads 62.34 ft / 19.00 m

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 33,159 shp / 24,737 Kw = 22.00 kts
   Range 11,748nm at 16.00 kts
   Bunker at max displacement = 7,533 tons

Complement:
   729 - 949

Cost:
   £0.628 million / $2.514 million

Distribution of weights at normal displacement:
   Armament: 66 tons, 0.4 %
      - Guns: 66 tons, 0.4 %
   Armour: 242 tons, 1.5 %
      - Torpedo bulkhead: 242 tons, 1.5 %
   Machinery: 1,370 tons, 8.3 %
   Hull, fittings & equipment: 4,254 tons, 25.7 %
   Fuel, ammunition & stores: 4,574 tons, 27.6 %
   Miscellaneous weights: 6,067 tons, 36.6 %
      - Hull below water: 2,359 tons
      - Hull void weights: 90 tons
      - Hull above water: 2,000 tons
      - On freeboard deck: 1,560 tons
      - Above deck: 58 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     37,611 lbs / 17,060 Kg = 810.5 x 4.5 " / 115 mm shells or 6.9 torpedoes
   Stability (Unstable if below 1.00): 1.80
   Metacentric height 12.1 ft / 3.7 m
   Roll period: 11.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.01
   Seaboat quality  (Average = 1.00): 1.59

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck ,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.625 / 0.643
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 21.81 kts
   Power going to wave formation at top speed: 54 %
   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 %,  28.05 ft / 8.55 m,  24.44 ft / 7.45 m
      - Forward deck:   30.00 %,  16.24 ft / 4.95 m,  16.24 ft / 4.95 m
      - Aft deck:   18.00 %,  16.24 ft / 4.95 m,  16.24 ft / 4.95 m
      - Quarter deck:   26.00 %,  24.44 ft / 7.45 m,  26.41 ft / 8.05 m
      - Average freeboard:      21.14 ft / 6.44 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 88.0 %
      - Above water (accommodation/working, high = better): 143.8 %
   Waterplane Area: 33,883 Square feet or 3,148 Square metres
   Displacement factor (Displacement / loading): 180 %
   Structure weight / hull surface area: 97 lbs/sq ft or 476 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.69
      - Overall: 1.02
   Adequate 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

1933 Refurbishment of Whale Class

Original guns : 74
Original ammo : 59


Base Cost : (12/4) * .2 = $0.6

A) Guns & machinery
6.6t- Replace 120mm guns with 115mm DP & 30mm
---
$0.0132   /4    = 0.0033 $
  0.0066 BP  /4  = 0.00165 BP

B) Armor & funct misc wt
6.6t - replace FC

$0.0066       /4  = 0.00165 $
  0.0066 BP  /4 =  0.00165 BP

C) hull, fittings, equip.

D) Fuel, ammo, Non func
5.7t ammo
7533t - replace coal/oil with oil
25t- Replace LR Radio
0t - Replace SR Radio
12t - Replace AC with CO2 Compressor AC
----
7576/2000 = $3.79 /4 = 0.9475 $

subtotal : $1.55245, 0.0033bp




The Whale series of Fleet Supply Vessels is intended for service at very distant ports. The vessels are to be high speed (cruise at 35% of full power) to allow rapid redeployment and will meet distant vessels at predetermined times.

Cruise speed at 33% of Full power : 16.466kts
Cruise speed at 29.72% of full power : 16knts
Cruise speed at 33% of Coal fired power only : 13.55 knts

Coal fuel is also carried as that may be the only fuel at distant ports.

The vessels are also to be a test bed for large scale electric drive installations

2% of  normal displacement : 16,573* 0.02 = 331 tons weapons and armor

8x 120mm : 74t
38mm Torpedo bulkheads : 242t
----
316 t

Weaponry :
1899 120L45 QF in MkIV mountings.

Misc Weight :
359t - Electric Drive, True Range : 11,580
50t - 2x long range wireless.
8t - Fire Control 1910
60t - "Windcatcher" evaporative cooling system.
2000+2000+1500 : 4,500 tons of Fleet Support for 45,000 tons of Military Support.

[Kaiser Kirk]

After the long Armored carrier discussion, I have reworked these designs.
It's also a good time to see if the rules pass the 'sniff test'.

Parthia is finishing 1934 Aircraft in HY1, 1933 when these would be laid down,
so the dimensions of the next generation of aircraft should be understood.

First is Gurdihskarag.
The two main variants would be one with 115mm secondary for -500 tons.
And one of 30knots & 8.3 draft for a further -900 tons.

So for ~1400 tons, I get 31knots and 130mm DP battery.
I think that's work it.

The vessel also makes a nice contrast to the earlier Wasendag Kaman which is not armored, 2,000 tons lighter and has a larger airgroup. Tradeoffs.

Gurdihskarag "Armored Bird of Prey", Parthia Fleet Armored Carrier laid down 1933

Displacement:
    27,500 t light; 28,642 t standard; 30,939 t normal; 32,777 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
    (622.61 ft / 606.96 ft) x 98.43 ft x (27.89 / 29.29 ft)
    (189.77 m / 185.00 m) x 30.00 m  x (8.50 / 8.93 m)

Armament:
      24 - 5.12" / 130 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 362 per gun
      Dual purpose guns in deck and hoist mounts, 1933 Model
      8 x 4-gun mounts on centreline ends, evenly spread
      4 x 2-gun mounts on sides, forward deck aft
        2 raised mounts - superfiring
      24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 2,800 per gun
      Anti-air guns in deck and hoist mounts, 1933 Model
      6 x 2 row quad mounts on sides, evenly spread
      36 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
      Anti-air guns in deck mounts, 1933 Model
      10 x Twin mounts on side ends, majority forward
      8 x Twin mounts layout not set
        4 double raised mounts
      Weight of broadside 2,121 lbs / 962 kg

Armour:
  - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    4.72" / 120 mm    394.52 ft / 120.25 m    10.20 ft / 3.11 m
    Ends:    1.38" / 35 mm    212.40 ft / 64.74 m    12.01 ft / 3.66 m
    Upper:    3.94" / 100 mm    394.52 ft / 120.25 m    18.04 ft / 5.50 m
      Main Belt covers 100 % of normal length
      Main Belt inclined -15.00 degrees (positive = in)

  - Torpedo Bulkhead - Additional damage containing bulkheads:
        1.57" / 40 mm    394.52 ft / 120.25 m    30.05 ft / 9.16 m
    Beam between torpedo bulkheads 78.74 ft / 24.00 m

  - 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:    1.38" / 35 mm    1.38" / 35 mm        1.38" / 35 mm
    2nd:    0.59" / 15 mm          -                  -
    3rd:    0.31" / 8 mm          -                  -

  - Armoured deck - multiple decks:
    For and Aft decks: 4.33" / 110 mm
    Forecastle: 1.38" / 35 mm  Quarter deck: 2.56" / 65 mm

Armored Box Carrier
75mm Flight Deck
35mm Hanger Floor

  - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
    Oil fired boilers, steam turbines,
    Geared drive, 3 shafts, 172,856 shp / 128,951 Kw = 31.00 kts
    Range 7,700nm at 16.00 kts
    Bunker at max displacement = 4,135 tons

Complement:
    1,166 - 1,516

Cost:
    £8.790 million / $35.160 million

Distribution of weights at normal displacement:
    Armament: 575 tons, 1.9 %
      - Guns: 575 tons, 1.9 %
    Armour: 6,491 tons, 21.0 %
      - Belts: 2,207 tons, 7.1 %
      - Torpedo bulkhead: 691 tons, 2.2 %
      - Armament: 187 tons, 0.6 %
      - Armour Deck: 3,323 tons, 10.7 %
      - Conning Tower: 84 tons, 0.3 %
    Machinery: 5,037 tons, 16.3 %
    Hull, fittings & equipment: 9,545 tons, 30.8 %
    Fuel, ammunition & stores: 3,439 tons, 11.1 %
    Miscellaneous weights: 5,853 tons, 18.9 %
      - Hull below water: 2,694 tons
      - Hull void weights: 190 tons
      - Hull above water: 2,694 tons
      - On freeboard deck: 79 tons
      - Above deck: 196 tons

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      61,243 lbs / 27,779 Kg = 913.6 x 5.1 " / 130 mm shells or 7.4 torpedoes
    Stability (Unstable if below 1.00): 1.41
    Metacentric height 8.8 ft / 2.7 m
    Roll period: 13.9 seconds
    Steadiness    - As gun platform (Average = 50 %): 70 %
            - Recoil effect (Restricted arc if above 1.00): 0.15
    Seaboat quality  (Average = 1.00): 1.71

Hull form characteristics:
    Hull has a flush deck,
      a ram bow and a cruiser stern
    Block coefficient (normal/deep): 0.650 / 0.656
    Length to Beam Ratio: 6.17 : 1
    'Natural speed' for length: 24.64 kts
    Power going to wave formation at top speed: 65 %
    Trim (Max stability = 0, Max steadiness = 100): 41
    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 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Forward deck:    30.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Aft deck:    35.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Quarter deck:    15.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Average freeboard:        39.37 ft / 12.00 m

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 99.3 %
        - Above water (accommodation/working, high = better): 294.3 %
    Waterplane Area: 45,764 Square feet or 4,252 Square metres
    Displacement factor (Displacement / loading): 128 %
    Structure weight / hull surface area: 130 lbs/sq ft or 634 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0.85
        - Longitudinal: 4.00
        - Overall: 1.00
    Adequate 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

Parthian Armored Carrier

Gurdih : Armor
Skarag : Bird of Prey

Intended 1 per fleet, and 2 for Home fleet, 5 in total.

Control Tower
One tower, on the starboard side is fitted.
The tower is designed to be as smooth as possible
so as not to disrupt air flow.

Guns
Fitted with the new 130mm, firing a heavyweight round, but one that can be sustainably handloaded.

The better sectional density means a flatter, further firing round, more effective
for AA work, while retaining effectiveness against surface targets.

As the historical British carriers, two mounts are mounted on each corner of the deck, for a total of 8. In true Parthian form, they then follow the American practice of two-gun mounts for and aft of the tower. For 4 more.

The 37mm and 23mm alternate down the sides of the deck,
and each side of the tower has 1 twin 23mm on each face at each level.


Airgroup

Pre 1933 Tech
4252/65 = 65 planes
65*80 = 5200

Post 1933 Tech
=4252/77 = 55 planes
55 * 95  = 5225

Armor

Armored Box Carrier
75mm Flight Deck
35mm Hanger Floor

Belt
The Armored Carrier is divided into two strakes
The Waterline belt is 120mm covering from +1.0 to -2.0
that is 3/cos (15) = 3.1058 =3.11

The upper portion at 100mm covers from +1.0 to +12.00
where it meets the armored flight deck.

The Waterline belt is backed by the  TDS.
This gives 120 + (40/2) = 140, before considering the inclined belt.

End Belt Fore : Protective deck 35/70
End Belt Stern : Protective Deck 65/100

TDS
A 3m deeep TDS on each side is backed by a heavy 40mm bulkhead.
A simple partition divides the outer 1.5m liquid filled from the interior 1.5m void.

The TDS rises to meet the bottom of the main deck at 1m


Miscellaneous Weight
190t - Reserve

AD
58t  - Fire Control 1930
25t -  Long Range Radio
0t  -  SR Radio
10t -  SR Radio - Deck Operations
10t -  SR Radio - CAG
10t -  RDF
10t -  Radio Jammer
50t -  Squadron Assembly Room.
27t - Vessel Ventilation, intakes

OD
5t  - Paravanes
27t - Vessel Ventilation
20t - 2 x Steam catapults
27t - Extra Fire Extinguisher

HAW
2613- Provisions for Aircraft
27t Additional Fire Extenguishers
27t Hanger Ventilation
27t Vessel Ventilation

HBW
2613t - Provisions for Aircraft
27t Hanger Ventilation
27t  Extra Pumps
27t  Extra Fire Ext

Decks
+12.0    Flight Deck - 75mm
+6.00    Lower Hanger Deck - 35mm
+3.50    Battery Deck
+1.00    Main  Deck, Top TDS
-1.50    2nd Platform Deck, Bottom Splinter Deck
      -2.0  Bottom of Armor Belt
-4.00      1st Platform Deck
-7.00      Engineering
-8.16      Double Bottom
-8.50  Keel

[Kaiser Kirk]

The Baskuc is 29,000 tons, 1500 more than the prior vessel.
1 knot slower, with the 115 not 130DP battery...
but much of that weight goes into an additional armored protective deck.

This would not only protect the vitals behind the main belt, but provide
splinter protection from any bombs or shells that made it to the hanger deck floor.

Overall the carrier would be  extremely hard to kill or disable, and would have
a very good chance of surviving a surprise first strike.
Which might be worth the +1500 tons (a destroyer) over the other armored,
or the +3500 (2 destroyers) over "Burning Bow".

Baskuc "Gryphon" - B, Parthia Fleet Armored Carrier laid down 1933

Displacement:
   29,000 t light; 30,036 t standard; 33,002 t normal; 35,375 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.08 ft / 606.96 ft) x 101.71 ft (Bulges 111.55 ft) x (26.25 / 28.00 ft)
   (189.00 m / 185.00 m) x 31.00 m (Bulges 34.00 m)  x (8.00 / 8.54 m)

Armament:
      24 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 359 per gun
     Dual purpose guns in deck and hoist mounts, 1931 Model
     8 x 4-gun mounts on centreline ends, evenly spread
     4 x 2-gun mounts on sides, forward deck aft
      2 raised mounts - superfiring
      24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 3,000 per gun
     Anti-air guns in deck and hoist mounts, 1929 Model
     6 x 2 row quad mounts on sides, evenly spread
      36 - 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
     10 x Twin mounts on side ends, majority forward
     8 x Twin mounts layout not set
      4 double raised mounts
      Weight of broadside 1,380 lbs / 626 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.53" / 115 mm   394.52 ft / 120.25 m   11.88 ft / 3.62 m
   Ends:   0.98" / 25 mm   212.40 ft / 64.74 m   12.01 ft / 3.66 m
   Upper:   2.95" / 75 mm   394.52 ft / 120.25 m   18.04 ft / 5.50 m
     Main Belt covers 100 % of normal length
     Main Belt inclined -15.00 degrees (positive = in)

Belt

Main Belt : 115mm inclined 15%
Backed by protective deck and TDS
Effective thickness : 170mm + slope

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   394.52 ft / 120.25 m   30.05 ft / 9.16 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

   - Hull Bulges:
      0.35" / 9 mm   394.52 ft / 120.25 m   19.69 ft / 6.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.38" / 35 mm   0.98" / 25 mm      1.38" / 35 mm
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.31" / 8 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 5.71" / 145 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 2.56" / 65 mm

Decks
Armored Box Carrier

75mm Flight Deck
35mm Hanger Deck Floor
35mm Protective Deck +1.5 to -1.0

Total Vert : 110mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 161,799 shp / 120,702 Kw = 30.00 kts
   Range 7,000nm at 18.00 kts
   Bunker at max displacement = 5,338 tons

Complement:
   1,223 - 1,591

Cost:
   £8.522 million / $34.088 million

Distribution of weights at normal displacement:
   Armament: 383 tons, 1.2 %
      - Guns: 383 tons, 1.2 %
   Armour: 7,737 tons, 23.4 %
      - Belts: 1,967 tons, 6.0 %
      - Torpedo bulkhead: 984 tons, 3.0 %
      - Bulges: 102 tons, 0.3 %
      - Armament: 132 tons, 0.4 %
      - Armour Deck: 4,421 tons, 13.4 %
      - Conning Tower: 131 tons, 0.4 %
   Machinery: 4,714 tons, 14.3 %
   Hull, fittings & equipment: 9,910 tons, 30.0 %
   Fuel, ammunition & stores: 4,002 tons, 12.1 %
   Miscellaneous weights: 6,255 tons, 19.0 %
      - Hull below water: 2,995 tons
      - Bulge void weights: 270 tons
      - Hull above water: 2,795 tons
      - On freeboard deck: 13 tons
      - Above deck: 182 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     78,347 lbs / 35,538 Kg = 1,688.4 x 4.5 " / 115 mm shells or 11.5 torpedoes
   Stability (Unstable if below 1.00): 1.67
   Metacentric height 12.0 ft / 3.6 m
   Roll period: 13.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 55 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 1.41

Hull form characteristics:
   Hull has low forecastle,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.653
   Length to Beam Ratio: 5.44 : 1
   'Natural speed' for length: 24.64 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 39
   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:   20.00 %,  22.97 ft / 7.00 m,  22.97 ft / 7.00 m
      - Forward deck:   30.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Aft deck:   35.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Quarter deck:   15.00 %,  39.37 ft / 12.00 m,  39.37 ft / 12.00 m
      - Average freeboard:      36.09 ft / 11.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 87.7 %
      - Above water (accommodation/working, high = better): 290.0 %
   Waterplane Area: 47,290 Square feet or 4,393 Square metres
   Displacement factor (Displacement / loading): 134 %
   Structure weight / hull surface area: 138 lbs/sq ft or 672 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 2.90
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily

Parthian Armored Carrier

Baskuc "Gryphon" a Griffen.
Charmush - Mythological Bird-dog

Intended 1 per fleet, and 2 for Home fleet, 5 in total.

Control Tower
One tower, on the starboard side is fitted.
The tower is designed to be as smooth as possible
so as not to disrupt air flow.

Guns
Fitted with the new 115mm, firing the same size round as the 120mm.
The better sectional density means a flatter, further firing round, more effective
for AA work, while retaining effectiveness against surface targets.

As the historical British carriers, two mounts are mounted on each corner of the deck, for a total of 8. In true Parthian form, they then follow the American practice of two-gun mounts for and aft of the tower. For 4 more.

The 37mm and 23mm alternate down the sides of the deck,
and each side of the tower has 1 twin 23mm on each face at each level.


Airgroup

Pre 1933 Tech
4393/65 = 67 planes
67*80 = 5360

Post 1933 Tech
4393/77 = 57 planes
57 * 95 = 5415


Armor

Decks
Armored Box Carrier

75mm Flight Deck
35mm Hanger Deck Floor
35mm Protective Deck +1.5 to -1.0

Total Vert : 110mm

Belt

Main Belt : 115mm inclined 15%
Backed by protective deck and TDS
Effective thickness : 170mm + slope

The Waterline belt is 115mm covering from +1.5 to -2.0
that 3.5/cos (15) = 3.6234 = 3.62

The Waterline belt is backed by the splinter protective deck and TDS.
This gives 115 + (35*1.5/2) + (57/2) = 17.0mm before considering the inclined belt.

End Belt Fore : Protective deck 35/60    flat/slope
End Belt Stern : Protective Deck 65/90   flat/slope


TDS
4.5m depth

9mm thin bulge skin
1.5m fuel filled bulge
Mild steel hull
1.5m fuel filled
19mm STS Bulkhead
1.5m void filled
2x19mm Twinned Holding Bulkhead

The TDS rises to meet the bottom of the Protective Splinter at 1m


Miscellaneous Weight
270t - Reserve

AD
39t  - Fire Control 1930
25t -  Long Range Radio
0t   -  SR Radio
10t -  SR Radio - Deck Operations
10t -  SR Radio - CAG
10t -  RDF
10t -  Radio Jammer
50t -  Squadron Assembly Room.
28t - Vessel Ventilation, intakes

OD
5t   - Paravanes
29t - Vessel Ventilation
40t - 4 x Steam catapults
29t - Extra Fire Extinguisher

HAW
2708- Provisions for 28.5 post 1933 Aircraft
29t Additional Fire Extinguishers
29t Hanger Ventilation
29t Vessel Ventilation

HBW
2708t - Provisions for 28.5 post 1933 Aircraft
29t Hanger Ventilation
29t  Extra Pumps
29t  Extra Fire Ext
200t - 20t double wall tank, 180t avgas (67,200gal)

Decks
+12.0     Flight Deck - 70mm
+6.50     Hanger Deck 30mm
+4.00     Battery Deck
+1.50     Main Deck, Top TDS
-1.00      2nd Platform Deck, Bottom Splinter Deck
       -2.0  Bottom of Armor Belt, top bulge
-3.50       1st Platform Deck
-6.50       Engineering
-7.66       Double Bottom
-8.00       Keel

[Kaiser Kirk]

1934 presents a number of choices for the Parthians.
They recently started the Xiyon Light Armored Cruisers, the Pouseki cruisers, the Sher corvettes and Robah destroyers.

2 of 4 Xiyon are complete, 4 Pouseki are built or building. The first 4 Sher and Robah are done.

With the completion of research into cruisers and destroyers, not only transoms are unlocked, but so is the opportunity for 10,000 ton cruisers with turrets.

Also, while a series of Improved Dual purpose mounts have been finished, those are just improvements over existing mounts. get automatically upgraded so are not much of a conundrum.

But, 3 main battery guns designs have been finished. All have heavy rounds and better MV..and so longer guns, than their predecessors.

The 435L55 will require new battleships, and I don't want to stop AC/C construction.

The 255L52 could be fitted to a slightly improved Zemaka. That would leave 2 Xiyons, when I want 4.
But this gun fires a shell massing as much as an old 280mm round at a 825mps. The high velocity robs it of some deck penetration, but gives it great belt penetration out to the horizon.

The last is the 165L54 firing an 80kg shell. This is the same weight of shell as the older 180L45s, with a much smaller cross section, giving much improved penetration.
Based on our rules, the limit of top spotting is CM = KM, so 16.5km for 165mm shell splashed vs. 18km.

This would be opposed by the Byzantine 191mm and 19.1km.
However that is a 2.6km band, which practice (aka our battles) make very hard to keep exactly in.
A ship 'charging' at 30kts against one firing broadside but angled would close at like 20knots and so make up the distance in 4 minutes, enough for a couple salvos at a range where few miss. 
Further it's entirely irrelevant for aerial spotting, or night battles, or weather.
At lower range, the QF 165mm should have a higher ROF. Any fall off due to loading fatigue would still be less than the Byzantines with their even heavier shell.

Further, with the 80kg shell, handloading is still an option, and a 165L54 is far lighter than the Pensacola's 205L55 - SS thinks about 1/2 the weight, so Mount & Hoist should be a valid option for 2-gun mounts.

Then, finishing in 1934.0,
300L47 and
265L49

Both of these are potential options for follow on Zemakas. The 265 fires a 339kg shell, more than the very old 305mm, making it a very attractive gun.

Options
I think I'd like to build the 2 more Xiyon, giving 4 Xiyon and 4 Pouseki to do sweeps into the foe's rear areas.

That does seem to mean I can make 165mm versions of Cleveland. Or...if I really squeeze, I can fit 215mm into 10,000 tons, but it winds up duplicating the USN's errors.

I need to explore what transoms do to the Destroyers/Corvettes.

Then plan on tonnage coming free - as I finish my Auxiliary program - for laying down 265mm armed Zemakas.
There I really wish I knew what Foxy was building, but I will guess he's staying with flimsy armor
that the 265 could ventilate.

[Kaiser Kirk]

Well, yesterday's post seems to be absent, shame.
Soon I'll have time to catch up on folks stories and ship designs.

Meanwhile I'm trying to explore designs for 1934.

The "Light Armored Cruiser" is a design I keep coming back to.
In the Parthian view, there is a role for a ship powerful enough to decisively defeat cruisers, but not larger than that.
That is of course the origin of the "Armored Cruiser".

But "Armored Cruisers" grew in size and now sport 9-11" guns, far in excess of what is needed to kill cruisers.

The 215L47 gun, firing a 180kg round will penetrate most countries cruiser's belts from the horizon on down, and the decks from the horizon on up. Ironically I never wanted to field a 8" gun,
but with the available technology, that's the gun that had the performance features I wanted.

So-- the Xiyon Class were "Light Armored Cruisers", but ones optimized for raiding.
The high speed, and the high sustained cruise speed push their displacement up.
With limited range, carriers need to operate near the 'front line', and have limited numbers of search planes. So if you can get ships "behind" them over night, you can get behind their aerial surveillance and be able to search for and surprise Carriers or auxiliaries, transports, oilers.
The high cruise speed also allows them to engage/disengage when contact is made, by being able to reach top speed quicker.

I have 2 built, I am strongly inclined to have 4 total, which will work with the 4 Pouseki cruisers.

So I could build a 1934 version of the 'Xiyon'
I could build a slightly smaller 'Zadar' with the same raider characteristics, but reduced armor, but again capable of killing cruisers - on 2 ships a savings of 6000 tons - or 3-4 destroyers.   I probably should rework the design with a magazine box, for better maximum armor.  A 25/55/55 deck with 65mm magazine box works, ups the Vert armor to 120/55 and Horizontal to 200/135 - far more respectable.

Or I could give up the raider capability.
I explored what I could fit on a 'Cleveland' style hull, it's probably a little cramped, but SS rates it as 'excellent'.

But the Manzikert options are more just heavily armed cruisers, useful that way, but not as raiders.
Also, while most of my cruisers have been 29-30 knots I think it's time to speed that up a notch.

I need to look at other nations designs as well, again I try to look at those completed, preferably for at least 3 years. I figure Parthian intelligence would have some idea of what is under construction, but imperfect. 



                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Light Armored Cruiser				Broadside						Horizontal		Vertical		Damage Absorption
Light Tons	Class	Length	Weight	MG	DP	AA	Aircraft	Max Speed	Range	Magazines	Machinery	Magazines	Machinery	Flotation	Torpedoes[/u]
15000	Xiyon LXIII	190m	2088	8 x 215L47	10 x 130L47	48	4	31	6328 @ 22	269	236	152	87	23582	3.6
15000	Xiyon LXII	190m	2088	8 x 215L47	10 x 130L47	48	4	32	6328 @ 22	232	200	135	70	22242	3.3
12000	Zadar II	190m	1452	6 x 215L47	8 x 115L47	20	2	32	6052 @ 22	135	135	60	60	20425	2.4
10000	Manzikert IV	167m	1714	8 x 215L47	8 x 115L47	32	4	30	8000 @ 16	180	115	120	55	16652	2.2
10000	Manzikert V	170m	1882	9 x 215L47	8 x 130L47	32	2	30	8044 @ 18	165	100	115	50	17047	2.2

[TacCovert4]

Honestly I like the Bottom one best.  Best range, speed is adequate, and armor is sufficient for inferior classes of cruiser.....Plus you're getting 3 for every 2 of the larger types.

[Jefgte]

The last 2 are very similar and offer a good ratio of weapons/speed/protection.

32kts are expensive and are they really necessary?

=> Byzantium still has a weakness for the Panzerschiff style.
With 2T3x215, they would have some style !!!

https://fr.wikipedia.org/wiki/Admiral_Graf_Spee#/media/Fichier:Bundesarchiv_DVM_10_Bild-23-63-06,_Panzerschiff_%22Admiral_Graf_Spee%22.jpg

[Kaiser Kirk]

Thanks for the thoughts.
31-32knots is where I'd like to have cruiser speeds in the future. 30 is where I've been for a while.
One constant is top speeds keep moving up.

Further, I figure the Byzantines and IJN are my primary potential foes. Potential entanglement with Rome is there as well.
The Romans make really fast vessels, and I presume the IJN does as well.

Overall, I wasn't too keen on the Manzikert - 115 DP or 130 DP, but felt the Zadar was too much of a compromise.

I'll have to ponder some more.
I'll probably post most of them, doesn't seem like Zadar is worth bothering with.
I should probably put up the 165mm version the 10,000 tonner as well when I post this series.
And yes, I've noticed the Byzantine Panzerschiff designs :).