WesWorld

The term I use, "Light Battleship", is a bit misleading. I mean the term as in a battleship in the size of a heavy cruiser. The idea is to have a relatively cheap ship that can be made in number and bolster the firepower of the fleet it's attached to. It is a similar concept to that of the "Riskable Battleships" discussed last year by Hood, Bruce, and Brock. The concept of use is closely tied to that of Wesworld.

I made 6 different designs for this concept, the smallest of which is 19,000 tons normal and practically just a faster Deutschland and the largest of which is 30,000 tons normal with 2x4 x 380mm guns.

The designs conformed to a standard of 33 kn, ranges of 10,000-12,000 nm @ 18 kn cruise speed, and a lack of torpedo bulkheads. I attempted to designed them to the French standard.

This is what I regarded as the best balanced of the bunch. The sim was made in SS3b3 (unfortunately my machine simply refuses SS2 and .Net 1.1)
It is 2,288 tons heavier than the MN Jean Bart class CAs and 3,140 tons heavier than the USN Los Angeles class CAs.

Quoted

BBL Scheme 3A3, Light Battleship laid down 1944

Displacement:
19,960 t light; 20,969 t standard; 24,000 t normal; 26,425 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(633.44 ft / 623.36 ft) x 84.65 ft x (31.17 / 33.47 ft)
(193.07 m / 190.00 m) x 25.80 m x (9.50 / 10.20 m)

Armament:
8 - 13.39" / 340 mm 50.0 cal guns - 1,322.77lbs / 600.00kg shells, 80 per gun
Breech loading guns in turret on barbette mounts, 1933 Model
2 x 4-gun mounts on centreline ends, evenly spread
12 - 3.94" / 100 mm 55.0 cal guns - 35.27lbs / 16.00kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1940 Model
6 x 2-gun mounts on sides, evenly spread
16 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 360 per gun
Anti-air guns in deck mounts, 1942 Model
4 x Quad mounts on sides, evenly spread
24 - 0.79" / 20.0 mm 70.0 cal guns - 0.24lbs / 0.11kg shells, 750 per gun
Anti-air guns in deck mounts, 1934 Model
12 x Twin mounts on sides, evenly spread
Weight of broadside 11,117 lbs / 5,043 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.87" / 200 mm 344.49 ft / 105.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 85 % of normal length
Main Belt inclined 20.00 degrees (positive = in)

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.8" / 300 mm 3.94" / 100 mm 7.87" / 200 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 0.59" / 15 mm - -
4th: 0.59" / 15 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 4.72" / 120 mm

- Conning towers: Forward 7.87" / 200 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 125,088 shp / 93,316 Kw = 32.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 5,456 tons

Complement:
963 - 1,253

Cost:
£15.161 million / $60.643 million

Distribution of weights at normal displacement:
Armament: 2,551 tons, 10.6 %
- Guns: 2,551 tons, 10.6 %
Armour: 5,021 tons, 20.9 %
- Belts: 1,571 tons, 6.5 %
- Armament: 1,078 tons, 4.5 %
- Armour Deck: 2,231 tons, 9.3 %
- Conning Tower: 141 tons, 0.6 %
Machinery: 3,194 tons, 13.3 %
Hull, fittings & equipment: 8,793 tons, 36.6 %
Fuel, ammunition & stores: 4,040 tons, 16.8 %
Miscellaneous weights: 400 tons, 1.7 %
- Above deck: 400 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
30,575 lbs / 13,868 Kg = 25.5 x 13.4 " / 340 mm shells or 2.8 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 4.8 ft / 1.5 m
Roll period: 16.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.85
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.511 / 0.524
Length to Beam Ratio: 7.36 : 1
'Natural speed' for length: 29.19 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 31.50 ft / 9.60 m, 26.25 ft / 8.00 m
- Forward deck: 25.00 %, 26.25 ft / 8.00 m, 22.97 ft / 7.00 m
- Aft deck: 25.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Quarter deck: 25.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Average freeboard: 24.72 ft / 7.54 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 84.4 %
- Above water (accommodation/working, high = better): 173.7 %
Waterplane Area: 36,930 Square feet or 3,431 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 176 lbs/sq ft or 858 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.45
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

I use that concept too, boosted the BBs battleline with " light" battleship.
My objectif is to add big guns or semi big guns (12") to the big BBs battleline:
- To increase the number of big guns vs enemy battleline.
- To divise the enemy fire.
- These light BBs are free in the movement.
- They are able to "Repulse" big AC.
- 2 of them are abble to engage an enemy BB in fire power.
-They carry 6 big guns.
2T3 or 3T2.

Jef

Looks like eggshells with hammers. Not a balanced design, IMHO.

Quoted

Looks like eggshells with hammers...

Remove 2x340 guns & increase protection.

Like I wrote early, 6 main guns.

Very interesting.

I think as a practical matter, it takes the 'Riskable Battleship' a bit further than I myself would go: I'd probably cut the speed down to 29 knots and beef up the armour, including a TDS. One of my concerns in this case is putting a quad 34cm turret on this relatively narrow beam.

I'd be interested to see the rest.

Quoted

Originally posted by HoOmAn
Looks like eggshells with hammers. Not a balanced design, IMHO.

The design idea was that the ships were heavy cruiser size and should be armored accordingly. A heavily armored (and slow) design would be limited in utility compared to a ship that could operate with the fleet speed. The idea of fleet speed is essential to the usefulness of the ship IMO.

Of course you can see the ships have quite heavy deck armor for their size (120mm / 4.7"). If I reduce the deck armor to 100m (3.9") I can easily increase main belt thickness to 300mm (11.8")

Quoted

Originally posted by Brockpaine
Very interesting.

I think as a practical matter, it takes the 'Riskable Battleship' a bit further than I myself would go: I'd probably cut the speed down to 29 knots and beef up the armour, including a TDS. One of my concerns in this case is putting a quad 34cm turret on this relatively narrow beam.

I'd be interested to see the rest.

I should think the guns would fit on the ship. It has a similar beam as that of the Normandie historical design and has no torpedo bulkhead to reduce beam available.

I believe that we shouldn't expect incredible protection on a heavy cruiser size and speed ship. I did not install torpedo bulkhead for that reason. It is a conflict of mission and an expensive proposition.

I will post the rest of the designs as well as a revision to Scheme 3A3.

The Scheme 1 design is 19,000 tons with 2x3 280mm/55 guns. The speed is 33 kn, +1kn over the "balanced" design.

Quoted

BBL Scheme 1, Light Battleship laid down 1944

Displacement:
15,696 t light; 16,392 t standard; 19,000 t normal; 21,087 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(632.91 ft / 623.36 ft) x 72.18 ft x (27.89 / 30.16 ft)
(192.91 m / 190.00 m) x 22.00 m x (8.50 / 9.19 m)

Armament:
6 - 11.02" / 280 mm 55.0 cal guns - 771.62lbs / 350.00kg shells, 100 per gun
Breech loading guns in turret on barbette mounts, 1944 Model
2 x 3-gun mounts on centreline ends, evenly spread
12 - 3.94" / 100 mm 50.0 cal guns - 35.27lbs / 16.00kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1940 Model
6 x Twin mounts on sides, evenly spread
16 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 360 per gun
Anti-air guns in deck mounts, 1942 Model
4 x Quad mounts on sides, evenly spread
24 - 0.79" / 20.0 mm 70.0 cal guns - 0.24lbs / 0.11kg shells, 750 per gun
Anti-air guns in deck mounts, 1944 Model
12 x Twin mounts on sides, evenly spread
Weight of broadside 5,164 lbs / 2,343 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.4" / 265 mm 328.08 ft / 100.00 m 13.12 ft / 4.00 m
Ends: 0.98" / 25 mm 295.28 ft / 90.00 m 13.12 ft / 4.00 m
Main Belt covers 81 % of normal length
Main Belt inclined 20.00 degrees (positive = in)

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.0" / 380 mm 3.94" / 100 mm 7.87" / 200 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 0.59" / 15 mm - -
4th: 0.59" / 15 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 2.95" / 75 mm
Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

- Conning towers: Forward 10.43" / 265 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 123,089 shp / 91,825 Kw = 33.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 4,694 tons

Complement:
808 - 1,051

Cost:
£10.325 million / $41.299 million

Distribution of weights at normal displacement:
Armament: 1,314 tons, 6.9 %
- Guns: 1,314 tons, 6.9 %
Armour: 4,531 tons, 23.8 %
- Belts: 2,098 tons, 11.0 %
- Armament: 778 tons, 4.1 %
- Armour Deck: 1,495 tons, 7.9 %
- Conning Tower: 160 tons, 0.8 %
Machinery: 3,143 tons, 16.5 %
Hull, fittings & equipment: 6,508 tons, 34.3 %
Fuel, ammunition & stores: 3,304 tons, 17.4 %
Miscellaneous weights: 200 tons, 1.1 %
- Above deck: 200 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
26,544 lbs / 12,040 Kg = 39.6 x 11.0 " / 280 mm shells or 2.6 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 3.6 ft / 1.1 m
Roll period: 15.9 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.70
Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.530 / 0.544
Length to Beam Ratio: 8.64 : 1
'Natural speed' for length: 28.73 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 29.53 ft / 9.00 m, 26.25 ft / 8.00 m
- Forward deck: 30.00 %, 26.25 ft / 8.00 m, 22.97 ft / 7.00 m
- Aft deck: 30.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Quarter deck: 20.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Average freeboard: 24.38 ft / 7.43 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 80.0 %
- Above water (accommodation/working, high = better): 179.8 %
Waterplane Area: 32,071 Square feet or 2,979 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 138 lbs/sq ft or 675 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.00
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room

The Scheme 2 design is an extension of the Scheme 1 design with much heavier armor (265mm -> 340mm MB, 75mm -> 150mm MD, 200mm -> 325mm Barbette) and a more extensive AA suite (16 x 57mm/60 -> 48 x 57mm/60). The range at cruise speed is also increased (10,000 nm -> 12,000 nm).

Quoted

BBL Scheme 2, Light Battleship laid down 1944

Displacement:
19,595 t light; 20,432 t standard; 24,000 t normal; 26,854 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(665.54 ft / 656.17 ft) x 76.12 ft x (31.82 / 34.63 ft)
(202.86 m / 200.00 m) x 23.20 m x (9.70 / 10.56 m)

Armament:
6 - 11.02" / 280 mm 55.0 cal guns - 771.62lbs / 350.00kg shells, 100 per gun
Breech loading guns in turret on barbette mounts, 1944 Model
2 x 3-gun mounts on centreline ends, evenly spread
12 - 3.94" / 100 mm 55.0 cal guns - 35.27lbs / 16.00kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1940 Model
6 x Twin mounts on sides, evenly spread
48 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 360 per gun
Anti-air guns in deck mounts, 1942 Model
12 x Quad mounts on sides, evenly spread
12 - 0.79" / 20.0 mm 70.0 cal guns - 0.27lbs / 0.12kg shells, 750 per gun
Breech loading guns in deck mounts, 1934 Model
6 x Twin mounts on sides, evenly spread
Weight of broadside 5,373 lbs / 2,437 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 13.4" / 340 mm 301.84 ft / 92.00 m 13.12 ft / 4.00 m
Ends: 0.98" / 25 mm 354.33 ft / 108.00 m 13.12 ft / 4.00 m
Main Belt covers 71 % of normal length
Main Belt inclined 20.00 degrees (positive = in)

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.0" / 380 mm 3.94" / 100 mm 12.8" / 325 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 0.59" / 15 mm - -
4th: 0.59" / 15 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 5.91" / 150 mm
Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

- Conning towers: Forward 13.39" / 340 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 139,352 shp / 103,956 Kw = 33.00 kts
Range 12,000nm at 18.00 kts
Bunker at max displacement = 6,422 tons

Complement:
963 - 1,253

Cost:
£11.759 million / $47.035 million

Distribution of weights at normal displacement:
Armament: 1,371 tons, 5.7 %
- Guns: 1,371 tons, 5.7 %
Armour: 7,043 tons, 29.3 %
- Belts: 2,545 tons, 10.6 %
- Armament: 1,094 tons, 4.6 %
- Armour Deck: 3,164 tons, 13.2 %
- Conning Tower: 240 tons, 1.0 %
Machinery: 3,559 tons, 14.8 %
Hull, fittings & equipment: 7,422 tons, 30.9 %
Fuel, ammunition & stores: 4,405 tons, 18.4 %
Miscellaneous weights: 200 tons, 0.8 %
- Above deck: 200 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
35,486 lbs / 16,096 Kg = 53.0 x 11.0 " / 280 mm shells or 3.3 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 3.9 ft / 1.2 m
Roll period: 16.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.56
Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.528 / 0.543
Length to Beam Ratio: 8.62 : 1
'Natural speed' for length: 29.48 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 28.87 ft / 8.80 m, 24.61 ft / 7.50 m
- Forward deck: 30.00 %, 24.61 ft / 7.50 m, 22.97 ft / 7.00 m
- Aft deck: 30.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Quarter deck: 20.00 %, 22.97 ft / 7.00 m, 24.61 ft / 7.50 m
- Average freeboard: 24.05 ft / 7.33 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 70.1 %
- Above water (accommodation/working, high = better): 164.4 %
Waterplane Area: 35,549 Square feet or 3,303 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 141 lbs/sq ft or 689 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.86
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room

The Scheme 3s are the series of design that focus on the 340mm gun. It is 2,000 tons lighter than what eventually became the Scheme 3A3 design and has cruiser level armor.

Quoted

BBL Scheme 3, Light Battleship laid down 1944

Displacement:
18,161 t light; 19,129 t standard; 22,000 t normal; 24,297 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(632.74 ft / 623.36 ft) x 83.66 ft x (29.20 / 31.41 ft)
(192.86 m / 190.00 m) x 25.50 m x (8.90 / 9.57 m)

Armament:
8 - 13.39" / 340 mm 50.0 cal guns - 1,322.77lbs / 600.00kg shells, 80 per gun
Breech loading guns in turret on barbette mounts, 1933 Model
2 x 4-gun mounts on centreline ends, evenly spread
12 - 3.94" / 100 mm 55.0 cal guns - 35.27lbs / 16.00kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1940 Model
6 x 2-gun mounts on sides, evenly spread
16 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 360 per gun
Anti-air guns in deck mounts, 1942 Model
4 x Quad mounts on sides, evenly spread
12 - 0.79" / 20.0 mm 70.0 cal guns - 0.24lbs / 0.11kg shells, 750 per gun
Anti-air guns in deck mounts, 1934 Model
6 x Twin mounts on sides, evenly spread
Weight of broadside 11,114 lbs / 5,041 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 362.53 ft / 110.50 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 89 % of normal length
Main Belt inclined 20.00 degrees (positive = in)

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.4" / 340 mm 3.94" / 100 mm 6.89" / 175 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 0.59" / 15 mm - -
4th: 0.59" / 15 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 2.95" / 75 mm

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 118,236 shp / 88,204 Kw = 32.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 5,168 tons

Complement:
903 - 1,174

Cost:
£14.568 million / $58.272 million

Distribution of weights at normal displacement:
Armament: 2,550 tons, 11.6 %
- Guns: 2,550 tons, 11.6 %
Armour: 3,814 tons, 17.3 %
- Belts: 1,224 tons, 5.6 %
- Armament: 984 tons, 4.5 %
- Armour Deck: 1,539 tons, 7.0 %
- Conning Tower: 67 tons, 0.3 %
Machinery: 3,019 tons, 13.7 %
Hull, fittings & equipment: 8,578 tons, 39.0 %
Fuel, ammunition & stores: 3,839 tons, 17.5 %
Miscellaneous weights: 200 tons, 0.9 %
- Above deck: 200 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
27,670 lbs / 12,551 Kg = 23.1 x 13.4 " / 340 mm shells or 2.6 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 4.9 ft / 1.5 m
Roll period: 15.9 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.88
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.506 / 0.519
Length to Beam Ratio: 7.45 : 1
'Natural speed' for length: 29.18 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 28.87 ft / 8.80 m, 25.59 ft / 7.80 m
- Forward deck: 30.00 %, 25.59 ft / 7.80 m, 22.97 ft / 7.00 m
- Aft deck: 30.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Quarter deck: 20.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Average freeboard: 24.15 ft / 7.36 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 89.3 %
- Above water (accommodation/working, high = better): 181.0 %
Waterplane Area: 36,326 Square feet or 3,375 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 178 lbs/sq ft or 867 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.34
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

The Scheme 3A2 is a small modification in tonnage in return for acceptable levels of heavy cruiser protection. A centerline rotating torpedo tube mount was added to examine whether such a ship would be well served by having that capability.
The armor is thickened a bit (150mm -> 200mm MB, 175mm -> 200m)

Quoted

BBL Scheme 3A2, Light Battleship laid down 1944

Displacement:
19,054 t light; 20,043 t standard; 23,000 t normal; 25,366 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(633.44 ft / 623.36 ft) x 84.32 ft x (29.53 / 31.76 ft)
(193.07 m / 190.00 m) x 25.70 m x (9.00 / 9.68 m)

Armament:
8 - 13.39" / 340 mm 50.0 cal guns - 1,322.77lbs / 600.00kg shells, 80 per gun
Breech loading guns in turret on barbette mounts, 1933 Model
2 x 4-gun mounts on centreline ends, evenly spread
12 - 3.94" / 100 mm 55.0 cal guns - 35.27lbs / 16.00kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1940 Model
6 x 2-gun mounts on sides, evenly spread
16 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 360 per gun
Anti-air guns in deck mounts, 1942 Model
4 x Quad mounts on sides, evenly spread
24 - 0.79" / 20.0 mm 70.0 cal guns - 0.24lbs / 0.11kg shells, 750 per gun
Anti-air guns in deck mounts, 1934 Model
12 x Twin mounts on sides, evenly spread
Weight of broadside 11,117 lbs / 5,043 kg
Main Torpedoes
4 - 21.0" / 533 mm, 22.97 ft / 7.00 m torpedoes - 1.572 t each, 6.289 t total
In 1 sets of deck mounted centre rotating tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.87" / 200 mm 352.69 ft / 107.50 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 87 % of normal length
Main Belt inclined 20.00 degrees (positive = in)

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.4" / 340 mm 3.94" / 100 mm 7.87" / 200 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 0.59" / 15 mm - -
4th: 0.59" / 15 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 2.95" / 75 mm

- Conning towers: Forward 7.87" / 200 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 122,426 shp / 91,330 Kw = 32.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 5,323 tons

Complement:
933 - 1,213

Cost:
£14.883 million / $59.534 million

Distribution of weights at normal displacement:
Armament: 2,563 tons, 11.1 %
- Guns: 2,551 tons, 11.1 %
- Weapons: 13 tons, 0.1 %
Armour: 4,226 tons, 18.4 %
- Belts: 1,601 tons, 7.0 %
- Armament: 1,088 tons, 4.7 %
- Armour Deck: 1,400 tons, 6.1 %
- Conning Tower: 137 tons, 0.6 %
Machinery: 3,126 tons, 13.6 %
Hull, fittings & equipment: 8,738 tons, 38.0 %
Fuel, ammunition & stores: 3,946 tons, 17.2 %
Miscellaneous weights: 400 tons, 1.7 %
- Above deck: 400 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
29,085 lbs / 13,193 Kg = 24.3 x 13.4 " / 340 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 4.7 ft / 1.4 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.88
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.519 / 0.532
Length to Beam Ratio: 7.39 : 1
'Natural speed' for length: 29.15 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 31.50 ft / 9.60 m, 26.25 ft / 8.00 m
- Forward deck: 25.00 %, 26.25 ft / 8.00 m, 22.97 ft / 7.00 m
- Aft deck: 25.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Quarter deck: 25.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Average freeboard: 24.72 ft / 7.54 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 87.0 %
- Above water (accommodation/working, high = better): 169.8 %
Waterplane Area: 37,064 Square feet or 3,443 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 177 lbs/sq ft or 862 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.36
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

You have already seen Scheme 3A3.

The Scheme 4 design revolves around the 381mm/50 gun. Athough I did do some minor edits witht he design to see what was possible, I deemed it too large a ship for the concept. I believe the smallest I got the ship to was 27,000 tons with heavy cruiser armor. At such sizes, the protection is inadequate and requires a torpedo bulkhead. I decided to abandon this line of design as a result.

Quoted

BBL Scheme 4, Light Battleship laid down 1944

Displacement:
25,143 t light; 26,527 t standard; 30,000 t normal; 32,778 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(666.07 ft / 656.17 ft) x 94.49 ft x (32.81 / 35.04 ft)
(203.02 m / 200.00 m) x 28.80 m x (10.00 / 10.68 m)

Armament:
8 - 15.00" / 381 mm 50.0 cal guns - 2,039.28lbs / 925.00kg shells, 80 per gun
Breech loading guns in turret on barbette mounts, 1931 Model
2 x 4-gun mounts on centreline ends, evenly spread
12 - 3.94" / 100 mm 55.0 cal guns - 35.27lbs / 16.00kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1940 Model
6 x 2-gun mounts on sides, evenly spread
16 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 360 per gun
Anti-air guns in deck mounts, 1942 Model
4 x Quad mounts on sides, evenly spread
24 - 0.79" / 20.0 mm 70.0 cal guns - 0.24lbs / 0.11kg shells, 750 per gun
Anti-air guns in deck mounts, 1934 Model
12 x Twin mounts on sides, evenly spread
Weight of broadside 16,849 lbs / 7,643 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11.8" / 300 mm 362.53 ft / 110.50 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 85 % of normal length
Main Belt inclined 20.00 degrees (positive = in)

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.8" / 300 mm 3.94" / 100 mm 7.87" / 200 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 0.59" / 15 mm - -
4th: 0.59" / 15 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 3.94" / 100 mm

- Conning towers: Forward 9.65" / 245 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 141,489 shp / 105,551 Kw = 32.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 6,251 tons

Complement:
1,139 - 1,481

Cost:
£19.653 million / $78.614 million

Distribution of weights at normal displacement:
Armament: 3,388 tons, 11.3 %
- Guns: 3,388 tons, 11.3 %
Armour: 6,164 tons, 20.5 %
- Belts: 2,506 tons, 8.4 %
- Armament: 1,260 tons, 4.2 %
- Armour Deck: 2,197 tons, 7.3 %
- Conning Tower: 201 tons, 0.7 %
Machinery: 3,613 tons, 12.0 %
Hull, fittings & equipment: 11,578 tons, 38.6 %
Fuel, ammunition & stores: 4,857 tons, 16.2 %
Miscellaneous weights: 400 tons, 1.3 %
- Above deck: 400 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
38,238 lbs / 17,344 Kg = 22.7 x 15.0 " / 381 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 6.0 ft / 1.8 m
Roll period: 16.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.86
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.516 / 0.528
Length to Beam Ratio: 6.94 : 1
'Natural speed' for length: 30.08 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 30.84 ft / 9.40 m, 26.25 ft / 8.00 m
- Forward deck: 25.00 %, 26.25 ft / 8.00 m, 24.61 ft / 7.50 m
- Aft deck: 25.00 %, 24.61 ft / 7.50 m, 22.97 ft / 7.00 m
- Quarter deck: 25.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Average freeboard: 25.07 ft / 7.64 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 84.8 %
- Above water (accommodation/working, high = better): 179.5 %
Waterplane Area: 43,617 Square feet or 4,052 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 203 lbs/sq ft or 990 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.47
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

The revised Scheme 3A3 (now 3A4).
I modified the armor (125mm -> 100mm MD, 200mm -> 300mm MB, 200mm -> 225mm Conning).
Tonnage was increased (24,000t -> 24,500t)

Quoted

BBL Scheme 3A4, Light Battleship laid down 1944

Displacement:
20,412 t light; 21,431 t standard; 24,500 t normal; 26,955 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(633.35 ft / 623.36 ft) x 83.99 ft x (31.82 / 34.16 ft)
(193.05 m / 190.00 m) x 25.60 m x (9.70 / 10.41 m)

Armament:
8 - 13.39" / 340 mm 50.0 cal guns - 1,322.77lbs / 600.00kg shells, 80 per gun
Breech loading guns in turret on barbette mounts, 1933 Model
2 x 4-gun mounts on centreline ends, evenly spread
12 - 3.94" / 100 mm 55.0 cal guns - 35.27lbs / 16.00kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1940 Model
6 x 2-gun mounts on sides, evenly spread
16 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 360 per gun
Anti-air guns in deck mounts, 1942 Model
4 x Quad mounts on sides, evenly spread
24 - 0.79" / 20.0 mm 70.0 cal guns - 0.24lbs / 0.11kg shells, 750 per gun
Anti-air guns in deck mounts, 1934 Model
12 x Twin mounts on sides, evenly spread
Weight of broadside 11,117 lbs / 5,043 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11.8" / 300 mm 337.93 ft / 103.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 83 % of normal length
Main Belt inclined 20.00 degrees (positive = in)

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.8" / 300 mm 3.94" / 100 mm 7.87" / 200 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 0.59" / 15 mm - -
4th: 0.59" / 15 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 3.94" / 100 mm

- Conning towers: Forward 8.86" / 225 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 126,921 shp / 94,683 Kw = 32.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 5,524 tons

Complement:
978 - 1,272

Cost:
£15.311 million / $61.245 million

Distribution of weights at normal displacement:
Armament: 2,551 tons, 10.4 %
- Guns: 2,551 tons, 10.4 %
Armour: 5,411 tons, 22.1 %
- Belts: 2,320 tons, 9.5 %
- Armament: 1,078 tons, 4.4 %
- Armour Deck: 1,852 tons, 7.6 %
- Conning Tower: 161 tons, 0.7 %
Machinery: 3,241 tons, 13.2 %
Hull, fittings & equipment: 8,809 tons, 36.0 %
Fuel, ammunition & stores: 4,088 tons, 16.7 %
Miscellaneous weights: 400 tons, 1.6 %
- Above deck: 400 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
31,271 lbs / 14,184 Kg = 26.1 x 13.4 " / 340 mm shells or 2.9 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 4.6 ft / 1.4 m
Roll period: 16.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.88
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.515 / 0.527
Length to Beam Ratio: 7.42 : 1
'Natural speed' for length: 29.15 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 31.17 ft / 9.50 m, 26.25 ft / 8.00 m
- Forward deck: 25.00 %, 26.25 ft / 8.00 m, 23.62 ft / 7.20 m
- Aft deck: 25.00 %, 23.62 ft / 7.20 m, 22.97 ft / 7.00 m
- Quarter deck: 25.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Average freeboard: 24.85 ft / 7.58 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.3 %
- Above water (accommodation/working, high = better): 172.7 %
Waterplane Area: 36,779 Square feet or 3,417 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 175 lbs/sq ft or 855 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.48
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room

I ran similar calculations some time ago. I post them so you have something to compare... Three designs total.

CCA43-A, South African Capital Heavy Cruiser laid down 1943

Displacement:
21.444 t light; 22.362 t standard; 23.882 t normal; 25.099 t full load

Dimensions: Length overall / water x beam x draught
739,34 ft / 715,22 ft x 78,74 ft x 25,59 ft (normal load)
225,35 m / 218,00 m x 24,00 m x 7,80 m

Armament:
6 - 12,01" / 305 mm guns (3x2 guns), 870,83lbs / 395,00kg shells, 1910 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 4,53" / 115 mm guns (8x2 guns), 50,71lbs / 23,00kg shells, 1938 Model
Dual purpose guns in turrets (on barbettes)
on side, evenly spread, 4 raised mounts
20 - 2,95" / 75,0 mm guns (10x2 guns), 13,23lbs / 6,00kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
24 - 0,79" / 20,0 mm guns (4x6 guns), 0,24lbs / 0,11kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
24 - 0,79" / 20,0 mm guns (12x2 guns), 0,24lbs / 0,11kg shells, 1935 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 6.313 lbs / 2.863 kg
Shells per gun, main battery: 120

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11,0" / 280 mm 485,56 ft / 148,00 m 10,66 ft / 3,25 m
Ends: Unarmoured
Main Belt covers 104% of normal length

- Torpedo Bulkhead:
1,57" / 40 mm 485,56 ft / 148,00 m 25,59 ft / 7,80 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11,8" / 300 mm 7,87" / 200 mm 11,0" / 280 mm
2nd: 1,38" / 35 mm 0,98" / 25 mm 1,18" / 30 mm
3rd: 0,59" / 15 mm - -
4th: 0,39" / 10 mm - -

- Armour deck: 3,94" / 100 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 147.453 shp / 110.000 Kw = 33,53 kts
Range 8.000nm at 15,00 kts
Bunker at max displacement = 2.737 tons

Complement:
959 - 1.248

Cost:
£12,667 million / $50,670 million

Distribution of weights at normal displacement:
Armament: 776 tons, 3,2%
Armour: 7.742 tons, 32,4%
- Belts: 2.388 tons, 10,0%
- Torpedo bulkhead: 724 tons, 3,0%
- Armament: 1.563 tons, 6,5%
- Armour Deck: 3.067 tons, 12,8%
- Conning Tower: 0 tons, 0,0%
Machinery: 3.808 tons, 15,9%
Hull, fittings & equipment: 8.968 tons, 37,6%
Fuel, ammunition & stores: 2.438 tons, 10,2%
Miscellaneous weights: 150 tons, 0,6%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
32.067 lbs / 14.546 Kg = 37,0 x 12,0 " / 305 mm shells or 4,6 torpedoes
Stability (Unstable if below 1.00): 1,11
Metacentric height 4,2 ft / 1,3 m
Roll period: 16,1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0,55
Seaboat quality (Average = 1.00): 1,01

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0,580
Length to Beam Ratio: 9,08 : 1
'Natural speed' for length: 30,48 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30,00 degrees
Stern overhang: 3,28 ft / 1,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 36,09 ft / 11,00 m
- Forecastle (43%): 27,89 ft / 8,50 m (19,69 ft / 6,00 m aft of break)
- Mid (50%): 19,69 ft / 6,00 m
- Quarterdeck (15%): 19,69 ft / 6,00 m
- Stern: 19,69 ft / 6,00 m
- Average freeboard: 24,62 ft / 7,51 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 104,2%
- Above water (accommodation/working, high = better): 164,7%
Waterplane Area: 42.114 Square feet or 3.912 Square metres
Displacement factor (Displacement / loading): 110%
Structure weight / hull surface area: 142 lbs/sq ft or 695 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,97
- Longitudinal: 1,26
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

CCA43-B, South African Capital Heavy Cruiser laid down 1943

Displacement:
22.633 t light; 23.684 t standard; 25.281 t normal; 26.559 t full load

Dimensions: Length overall / water x beam x draught
762,31 ft / 738,19 ft x 78,74 ft x 26,25 ft (normal load)
232,35 m / 225,00 m x 24,00 m x 8,00 m

Armament:
6 - 12,99" / 330 mm guns (2x3 guns), 1.135,38lbs / 515,00kg shells, 1941 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
16 - 4,53" / 115 mm guns (8x2 guns), 50,71lbs / 23,00kg shells, 1938 Model
Dual purpose guns in turrets (on barbettes)
on side, evenly spread, 4 raised mounts
20 - 2,95" / 75,0 mm guns (10x2 guns), 13,23lbs / 6,00kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
24 - 0,79" / 20,0 mm guns (4x6 guns), 0,24lbs / 0,11kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
24 - 0,79" / 20,0 mm guns (12x2 guns), 0,24lbs / 0,11kg shells, 1935 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 7.900 lbs / 3.583 kg
Shells per gun, main battery: 120

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11,0" / 280 mm 511,81 ft / 156,00 m 10,66 ft / 3,25 m
Ends: Unarmoured
Main Belt covers 107% of normal length

- Torpedo Bulkhead:
1,57" / 40 mm 511,81 ft / 156,00 m 26,25 ft / 8,00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11,8" / 300 mm 7,87" / 200 mm 11,0" / 280 mm
2nd: 1,38" / 35 mm 0,98" / 25 mm 1,18" / 30 mm
3rd: 0,59" / 15 mm - -
4th: 0,39" / 10 mm - -

- Armour deck: 4,13" / 105 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 150.000 shp / 111.900 Kw = 33,49 kts
Range 5.400nm at 18,00 kts
Bunker at max displacement = 2.874 tons

Complement:
1.002 - 1.303

Cost:
£13,952 million / $55,808 million

Distribution of weights at normal displacement:
Armament: 949 tons, 3,8%
Armour: 7.978 tons, 31,6%
- Belts: 2.501 tons, 9,9%
- Torpedo bulkhead: 783 tons, 3,1%
- Armament: 1.370 tons, 5,4%
- Armour Deck: 3.324 tons, 13,1%
- Conning Tower: 0 tons, 0,0%
Machinery: 3.874 tons, 15,3%
Hull, fittings & equipment: 9.682 tons, 38,3%
Fuel, ammunition & stores: 2.648 tons, 10,5%
Miscellaneous weights: 150 tons, 0,6%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
33.230 lbs / 15.073 Kg = 30,3 x 13,0 " / 330 mm shells or 4,6 torpedoes
Stability (Unstable if below 1.00): 1,14
Metacentric height 4,5 ft / 1,4 m
Roll period: 15,7 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0,62
Seaboat quality (Average = 1.00): 1,06

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0,580
Length to Beam Ratio: 9,38 : 1
'Natural speed' for length: 30,89 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30,00 degrees
Stern overhang: 3,28 ft / 1,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 36,09 ft / 11,00 m
- Forecastle (43%): 27,89 ft / 8,50 m (19,69 ft / 6,00 m aft of break)
- Mid (50%): 19,69 ft / 6,00 m
- Quarterdeck (15%): 19,69 ft / 6,00 m
- Stern: 19,69 ft / 6,00 m
- Average freeboard: 24,62 ft / 7,51 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 106,6%
- Above water (accommodation/working, high = better): 162,7%
Waterplane Area: 43.466 Square feet or 4.038 Square metres
Displacement factor (Displacement / loading): 108%
Structure weight / hull surface area: 148 lbs/sq ft or 723 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,97
- Longitudinal: 1,29
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

CCA43-C, South African Capital Heavy Cruiser laid down 1943

Displacement:
22.642 t light; 23.521 t standard; 25.281 t normal; 26.689 t full load

Dimensions: Length overall / water x beam x draught
762,31 ft / 738,19 ft x 78,74 ft x 26,25 ft (normal load)
232,35 m / 225,00 m x 24,00 m x 8,00 m

Armament:
6 - 11,02" / 280 mm guns (3x2 guns), 705,48lbs / 320,00kg shells, 1941 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 4,53" / 115 mm guns (8x2 guns), 50,71lbs / 23,00kg shells, 1938 Model
Dual purpose guns in turrets (on barbettes)
on side, evenly spread, 4 raised mounts
20 - 2,95" / 75,0 mm guns (10x2 guns), 13,23lbs / 6,00kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
24 - 0,79" / 20,0 mm guns (4x6 guns), 0,24lbs / 0,11kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
24 - 0,79" / 20,0 mm guns (12x2 guns), 0,24lbs / 0,11kg shells, 1935 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 5.320 lbs / 2.413 kg
Shells per gun, main battery: 120

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11,0" / 280 mm 452,76 ft / 138,00 m 10,66 ft / 3,25 m
Ends: Unarmoured
Main Belt covers 94% of normal length

- Torpedo Bulkhead:
1,57" / 40 mm 557,74 ft / 170,00 m 26,25 ft / 8,00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12,6" / 320 mm 7,87" / 200 mm 11,8" / 300 mm
2nd: 1,38" / 35 mm 0,98" / 25 mm 1,18" / 30 mm
3rd: 0,59" / 15 mm - -
4th: 0,39" / 10 mm - -

- Armour deck: 5,51" / 140 mm, Conning tower: 0,79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 150.000 shp / 111.900 Kw = 33,49 kts
Range 6.000nm at 18,00 kts
Bunker at max displacement = 3.168 tons

Complement:
1.002 - 1.303

Cost:
£12,194 million / $48,777 million

Distribution of weights at normal displacement:
Armament: 629 tons, 2,5%
Armour: 9.050 tons, 35,8%
- Belts: 2.257 tons, 8,9%
- Torpedo bulkhead: 853 tons, 3,4%
- Armament: 1.494 tons, 5,9%
- Armour Deck: 4.432 tons, 17,5%
- Conning Tower: 15 tons, 0,1%
Machinery: 3.874 tons, 15,3%
Hull, fittings & equipment: 8.939 tons, 35,4%
Fuel, ammunition & stores: 2.639 tons, 10,4%
Miscellaneous weights: 150 tons, 0,6%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
37.582 lbs / 17.047 Kg = 56,1 x 11,0 " / 280 mm shells or 5,5 torpedoes
Stability (Unstable if below 1.00): 1,13
Metacentric height 4,4 ft / 1,3 m
Roll period: 15,8 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0,46
Seaboat quality (Average = 1.00): 1,07

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0,580
Length to Beam Ratio: 9,38 : 1
'Natural speed' for length: 30,89 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30,00 degrees
Stern overhang: 3,28 ft / 1,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 36,09 ft / 11,00 m
- Forecastle (43%): 27,89 ft / 8,50 m (19,69 ft / 6,00 m aft of break)
- Mid (50%): 19,69 ft / 6,00 m
- Quarterdeck (15%): 19,69 ft / 6,00 m
- Stern: 19,69 ft / 6,00 m
- Average freeboard: 24,62 ft / 7,51 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 94,1%
- Above water (accommodation/working, high = better): 162,7%
Waterplane Area: 43.466 Square feet or 4.038 Square metres
Displacement factor (Displacement / loading): 115%
Structure weight / hull surface area: 137 lbs/sq ft or 667 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,98
- Longitudinal: 1,20
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

A more "wild" design. It takes the Scheme 1&2 designs and rearranges the turrets all fore and turns the rear into a flight deck. Despite it's flaws, I rather like it.

The configuration is as follows:
The flight deck extends from the rear to the B turret by being angled to the side (port or star). The superstructure is move the side to accommodate. The flight deck should be 80m-90m long. You can think of the Kiev class to see the proposed arrangement.

Quoted

BBL Scheme 5, Light Battleship laid down 1944

Displacement:
13,865 t light; 14,527 t standard; 17,000 t normal; 18,979 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(583.74 ft / 574.15 ft) x 75.46 ft x (27.23 / 29.53 ft)
(177.92 m / 175.00 m) x 23.00 m x (8.30 / 9.00 m)

Armament:
8 - 11.02" / 280 mm 55.0 cal guns - 771.62lbs / 350.00kg shells, 80 per gun
Breech loading guns in turret on barbette mounts, 1933 Model
2 x 4-gun mounts on centreline, forward evenly spread
8 - 3.94" / 100 mm 55.0 cal guns - 35.27lbs / 16.00kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1940 Model
4 x 2-gun mounts on sides, evenly spread
16 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 360 per gun
Anti-air guns in deck mounts, 1942 Model
4 x Quad mounts on sides, evenly spread
24 - 0.79" / 20.0 mm 70.0 cal guns - 0.24lbs / 0.11kg shells, 750 per gun
Anti-air guns in deck mounts, 1934 Model
12 x Twin mounts on sides, evenly spread
Weight of broadside 6,567 lbs / 2,979 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 328.08 ft / 100.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 88 % of normal length
Main Belt inclined 20.00 degrees (positive = in)

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.0" / 280 mm 3.54" / 90 mm 6.89" / 175 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 0.59" / 15 mm - -
4th: 0.59" / 15 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 1.97" / 50 mm

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 103,903 shp / 77,511 Kw = 32.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 4,452 tons

Complement:
743 - 967

Cost:
£10.472 million / $41.887 million

Distribution of weights at normal displacement:
Armament: 1,703 tons, 10.0 %
- Guns: 1,703 tons, 10.0 %
Armour: 2,567 tons, 15.1 %
- Belts: 1,108 tons, 6.5 %
- Armament: 733 tons, 4.3 %
- Armour Deck: 642 tons, 3.8 %
- Conning Tower: 84 tons, 0.5 %
Machinery: 2,653 tons, 15.6 %
Hull, fittings & equipment: 6,252 tons, 36.8 %
Fuel, ammunition & stores: 3,135 tons, 18.4 %
Miscellaneous weights: 690 tons, 4.1 %
- Above deck: 690 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
21,984 lbs / 9,972 Kg = 32.8 x 11.0 " / 280 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 3.8 ft / 1.2 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.81
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.504 / 0.519
Length to Beam Ratio: 7.61 : 1
'Natural speed' for length: 27.96 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 29.69 ft / 9.05 m, 24.61 ft / 7.50 m
- Forward deck: 20.00 %, 24.61 ft / 7.50 m, 22.97 ft / 7.00 m
- Aft deck: 20.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Quarter deck: 35.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Average freeboard: 24.05 ft / 7.33 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 87.3 %
- Above water (accommodation/working, high = better): 180.6 %
Waterplane Area: 30,140 Square feet or 2,800 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 150 lbs/sq ft or 734 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.52
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

Breakdown of Miscellaneous Weights:
- 430 tons for Avionics
- 110 tons for Electronics Suite
- 50 tons crew comforts (air conditioning, movie theatre, and ice cream machine)
- 25 tons for electronic fire-control on 280mm, 100mm, and 57mm guns
- 50 tons for communications
- 5 tons for forward Voith-Schneider maneuvering system
- 20 tons for extra damage-control gear, pumps, etc.
Total etra weight: 690

Avionics:
Hangar (60m x 20m x 6m)
- Aircraft/Helicopters (15 aircraft, 375 tons)
- Rear Elevator (1 elevator, 15 tons)
- Catapults on Angled Deck (2 catapults, 40 tons)

Electronics:
- DRBV-8B surface and air search radars (2 radars, 25 tons)
- DRBV-7 air search radar (1 radar, 10 tons)
- DRBN-1 navigational surface and air search radar (2 radars, 4 tons)
- DRBC-3A fire-control radar (3 radars, 12 tons)
- DRBI-3 height-finding radar (1 radar, 6 tons)
- SAGEM HF/DF (3 tons)
- Diesel electric double generator set (10 tons)
- Combat Management Center: 40 tons

What is such a short flight deck good for? Helicopters?

Have you considered turbulences caused by the superstructure?

Hyprid-carriers have often been discussed - both OTL and in WesWorld. Usually the result is: Not worth it. They get the worst of two worlds, not enough planes and handling space, not enough guns and armor. Why would it be different with your design?

Quoted

What is such a short flight deck good for? Helicopters?

Well by my sketches, the flight deck is angled 12°. Given a length of 90m, that means the flight deck itself is 92m.

It is not long enough to land a jet on, but a propeller plane took 60-75m to land unassisted on a jeep carrier, so it's quite enough for those. Given the much higher speed of the ship, I would suppose required runway length would be much reduced. But a deck for helicopters is always useful.

I did not examine closely the length of catapults and arrested landings for modern jet planes but they seem to be 50-60m and 100m long respectively.

I had originally set for a 100-120m flight deck, but it was lost during the designing. I can always increase the length of the ship to compensate, it would be a 500t-1000t modification (which I will do).

Quoted

Have you considered turbulences caused by the superstructure?

Well of course I have, but I see no reason that it should be an issue. The superstructure is not located aft, it is located midship. The difference between the normal location is that it's put off on the side a little. But why should this be a more significant problem than that faced by carriers and their arrangement to begin with?

Quoted

Usually the result is: Not worth it. They get the worst of two worlds, not enough planes and handling space, not enough guns and armor. Why would it be different with your design?

Given that ships of Wesworld in the 17,000t-23,000t are all heavy cruisers with armaments of 200m-230m guns. Would you characterize a 17,000t ship with 8x280mm guns as inadequate in firepower? I wouldn't.

Now the airwing is much reduced compared to that of a 17,000t pure carrier (15 vs 40-50). But it is not an insignificant number.

The difference with the design offers utility through it's small displacement and heavy firepower. It's armor is not inferior to that of the heavy cruisers and it's firepower far superior. Then the air wing is an added bonus. It pays the price of light cruiser fuel range in exchange.

Why is this a better idea than a pure pocket battleship?
The recoil of 8x280mm is very high, so high that you are forced into a hull of 16,000t and above if you attempt to keep the fleet speed of 32 kn.

In other words, the hull cannot go smaller, but it also has a large amount of deck space unused. Taking this deck space and using it for flight operations is a minimal additional cost to the ship. Also, as you know, the cost of aircraft in weight is exponential so a small airwing complement has a virtue on all it's own.

Since the ship was already intended to be a fleet attachment that bolsters a task force's firepower, the added ability to conduct Recon/ASW/CAP for minimal cost is a good thing IMO.

Quoted

Now the airwing is much reduced compared to that of a 17,000t pure carrier (15 vs 40-50). But it is not an insignificant number.

On a flight deck of such miniscule size, I think you would fortunate to spot four aircraft at a time for launch, so getting aircraft into the air would take a considerable time. Effectively, you have a much reduced air group.

Landings would be similarly impacted. I doubt that aircraft regularly landed on jeep carriers "unassisted". They were equipped with arresting gear the same as larger vessels. Before the second aircraft could land you would have to bring the first aircraft below decks using a single hangar. That leaves however-many aircraft left stooging about while the deck is cleared for the landing of the next aircraft.

Here's one of my own designs as a comparison; ship re-uses the French 305mm guns used on the coast defense ships.

Quoted

[SIZE=3]Clemenceau laid down 1945[/SIZE]

Displacement:
21,212 t light; 22,317 t standard; 25,656 t normal; 28,327 t full load

Dimensions: Length overall / water x beam x draught
733.73 ft / 721.78 ft x 80.38 ft x 27.89 ft (normal load)
223.64 m / 220.00 m x 24.50 m x 8.50 m

Armament:
8 - 12.01" / 305 mm guns (4x2 guns), 952.40lbs / 432.00kg shells, 1925 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
12 - 5.12" / 130 mm guns (6x2 guns), 79.37lbs / 36.00kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships
12 - 2.24" / 57.0 mm guns (6x2 guns), 6.61lbs / 3.00kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread, all raised mounts
24 - 0.79" / 20.0 mm guns (8x3 guns), 0.24lbs / 0.11kg shells, 1945 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 8,657 lbs / 3,927 kg
Shells per gun, main battery: 120

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11.8" / 300 mm 469.16 ft / 143.00 m 10.76 ft / 3.28 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Torpedo Bulkhead:
1.57" / 40 mm 469.16 ft / 143.00 m 24.08 ft / 7.34 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.8" / 350 mm 7.87" / 200 mm 7.87" / 200 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
3rd: 0.59" / 15 mm 0.20" / 5 mm 0.20" / 5 mm
4th: 0.39" / 10 mm - -

- Armour deck: 3.94" / 100 mm, Conning tower: 13.78" / 350 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 86,687 shp / 64,668 Kw = 29.00 kts
Range 12,000nm at 18.00 kts
Bunker at max displacement = 6,010 tons

Complement:
1,013 - 1,317

Cost:
£13.035 million / $52.138 million

Distribution of weights at normal displacement:
Armament: 997 tons, 3.9 %
Armour: 8,183 tons, 31.9 %
- Belts: 2,513 tons, 9.8 %
- Torpedo bulkhead: 658 tons, 2.6 %
- Armament: 1,668 tons, 6.5 %
- Armour Deck: 3,085 tons, 12.0 %
- Conning Tower: 258 tons, 1.0 %
Machinery: 2,189 tons, 8.5 %
Hull, fittings & equipment: 9,468 tons, 36.9 %
Fuel, ammunition & stores: 4,444 tons, 17.3 %
Miscellaneous weights: 375 tons, 1.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
45,782 lbs / 20,766 Kg = 52.9 x 12.0 " / 305 mm shells or 7.0 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 4.6 ft / 1.4 m
Roll period: 15.7 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.71
Seaboat quality (Average = 1.00): 1.35

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.555
Length to Beam Ratio: 8.98 : 1
'Natural speed' for length: 30.73 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.81 ft / 10.00 m
- Forecastle (20 %): 26.25 ft / 8.00 m
- Mid (50 %): 19.69 ft / 6.00 m
- Quarterdeck (15 %): 19.69 ft / 6.00 m
- Stern: 19.69 ft / 6.00 m
- Average freeboard: 22.51 ft / 6.86 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 79.7 %
- Above water (accommodation/working, high = better): 168.8 %
Waterplane Area: 42,356 Square feet or 3,935 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 150 lbs/sq ft or 733 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.31
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

My alternative to Brock's Vanguard.

Quoted

Clemenceau Scheme 2 laid down 1945

Displacement:
16,008 t light; 16,844 t standard; 20,000 t normal; 22,525 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(663.52 ft / 656.17 ft) x 73.49 ft x (28.87 / 31.51 ft)
(202.24 m / 200.00 m) x 22.40 m x (8.80 / 9.60 m)

Armament:
8 - 12.01" / 305 mm 45.0 cal guns - 952.40lbs / 432.00kg shells, 80 per gun
Breech loading guns in turret on barbette mounts, 1925 Model
4 x 2-gun mounts on centreline ends, evenly spread
1 raised mount - superfiring
12 - 5.12" / 130 mm 54.0 cal guns - 79.37lbs / 36.00kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1943 Model
4 x 2-gun mounts on sides, evenly spread
12 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 360 per gun
Auto rapid fire guns in deck and hoist mounts, 1945 Model
6 x Twin mounts on sides, evenly spread
24 - 0.79" / 20.0 mm 70.0 cal guns - 0.24lbs / 0.11kg shells, 750 per gun
Anti-air guns in deck mounts, 1934 Model
12 x Twin mounts on sides, evenly spread
Weight of broadside 8,657 lbs / 3,927 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11.8" / 300 mm 426.51 ft / 130.00 m 10.76 ft / 3.28 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.8" / 350 mm 3.54" / 90 mm 7.09" / 180 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 0.59" / 15 mm 0.20" / 5 mm 0.20" / 5 mm
4th: 0.39" / 10 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 3.94" / 100 mm
Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

- Conning towers: Forward 11.81" / 300 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 74,689 shp / 55,718 Kw = 29.00 kts
Range 12,000nm at 18.00 kts
Bunker at max displacement = 5,681 tons

Complement:
840 - 1,093

Cost:
£10.965 million / $43.859 million

Distribution of weights at normal displacement:
Armament: 1,859 tons, 9.3 %
- Guns: 1,859 tons, 9.3 %
Armour: 5,544 tons, 27.7 %
- Belts: 2,257 tons, 11.3 %
- Armament: 983 tons, 4.9 %
- Armour Deck: 2,117 tons, 10.6 %
- Conning Tower: 187 tons, 0.9 %
Machinery: 1,886 tons, 9.4 %
Hull, fittings & equipment: 6,534 tons, 32.7 %
Fuel, ammunition & stores: 3,992 tons, 20.0 %
Miscellaneous weights: 185 tons, 0.9 %
- On freeboard deck: 185 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
27,864 lbs / 12,639 Kg = 32.2 x 12.0 " / 305 mm shells or 3.3 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 3.6 ft / 1.1 m
Roll period: 16.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.82
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.503 / 0.519
Length to Beam Ratio: 8.93 : 1
'Natural speed' for length: 29.49 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 21.33 ft / 6.50 m, 20.01 ft / 6.10 m
- Forward deck: 30.00 %, 20.01 ft / 6.10 m, 19.36 ft / 5.90 m
- Aft deck: 35.00 %, 12.80 ft / 3.90 m, 12.80 ft / 3.90 m
- Quarter deck: 15.00 %, 12.80 ft / 3.90 m, 13.12 ft / 4.00 m
- Average freeboard: 16.44 ft / 5.01 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 65.5 %
- Above water (accommodation/working, high = better): 121.2 %
Waterplane Area: 33,499 Square feet or 3,112 Square metres
Displacement factor (Displacement / loading): 119 %
Structure weight / hull surface area: 150 lbs/sq ft or 734 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.32
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room

Quoted

Originally posted by Logi

Quoted

What is such a short flight deck good for? Helicopters?

Well by my sketches, the flight deck is angled 12°. Given a length of 90m, that means the flight deck itself is 92m.

If you have a sketch, please post. Makes discussions much easier.

Quoted

Originally posted by Logi
It is not long enough to land a jet on, but a propeller plane took 60-75m to land unassisted on a jeep carrier, so it's quite enough for those.

Can you provide evidence this is true, cite a useful source for your assumption?

60-75m to land a propeller plane does not tell me much. Are we talking Sopwith Camel, Fairey Swordfish, Grumman Wildcat/Martlet or Fought Corsairs here?

While you may be able to land a Fiesler Storch or similar plane almost spot on against the wind on a carrier an unassisted landing of a much larger and heavier plane is an issue. So please back up your claim.

Quoted

Originally posted by Logi
Given the much higher speed of the ship, I would suppose required runway length would be much reduced.

Higher speeds help, for sure. The difference between a so-called jeep-carrier and a fleet carrier is about 10 knots of wind under the wings of a landing aircraft. You seem to have thought this through so I assume you can provide either historical data or at least some math to show those 10 knots make the huge difference you seem to take into account?

Quoted

Originally posted by Logi
But a deck for helicopters is always useful.

I do not object, thought this is an entire different field of operations. VTOL or helicopters need less space for take of and landing, but they still need space and are impacted by turbulences. Given deck size of your design compared to historical hyprid-designs I can see 6-8 spots to operate VTOL vehicles. That's not airstrike capability, but offers anti-submarine and SAR services.

However, we are talking a 1944er design I and think helicopters or other VTOL vehicles that offer such capability are still a long way ahead in time.

Quoted

Originally posted by Logi
I did not examine closely the length of catapults and arrested landings for modern jet planes but they seem to be 50-60m and 100m long respectively.

Length, as well as weight and overall size of installation, heavily depends on the type of catapult you are using and what weights you are going to catapult. For example the Heinkel K-6, K-7 or K-9 catapults used on catapult ships like the Ostmark had a length of 41 to 41,5 meters and were capable to launch about 15 tons. Later versions allowed up to 20 tons [source Marinearchiv]. However, those were very bulky and heavy installations - as you can guess from line drawings of those ships. Is this what you had in mind for your ship?

Warships like BB or cruisers usually featured much smaller and less capable catapults, the largest and most powerful in this class probably were the Typ 2 Mod.1 No.11 on the IJN AganoNoshiro with 26m length or the Kure No.2 Mod.5 of 19,4m on the Yahagi/Sakawa. One should note that this is total length. The launching length actually was only 15,4m on the No.2 Mod.5, meant to accelerate 4 tons with 28m/sec [source LAcroix/Wells]. For comparison: The catapults used on German warships like the Prinz Eugen hat a length of 14m [source Schmalenbach].

Quoted

Originally posted by Logi
I had originally set for a 100-120m flight deck, but it was lost during the designing. I can always increase the length of the ship to compensate, it would be a 500t-1000t modification (which I will do).

The minimum flight deck length required to operate aircraft like a Swordfish, Wildcat or TBF successfully is about 400ft according to what has been discussed on these boards and elsewhere (e.g. warships1). This does not include simultanous launch and recovery activities and it does not include the launch of large air strikes at a time for which there would be not enough space. Gives you an idea why the jeep-carriers were that size minumum.

Quoted

Originally posted by Logi

Quoted

Have you considered turbulences caused by the superstructure?

Well of course I have, but I see no reason that it should be an issue. The superstructure is not located aft, it is located midship. The difference between the normal location is that it's put off on the side a little. But why should this be a more significant problem than that faced by carriers and their arrangement to begin with?

You have missed my point. I see no issues with superstructure set aside. The offset wight will be compensated by your designs flight deck and catapult installation (if any) or by bulges. With a constant air stream along the flight deck turbulances from the bridge are not more a problem than on any carrier. But what about your main guns? You placed them on your ships bow. Those heavy weights you cannot offset from your ships centerline to rule out turbulences. Although, on a second glimpse, it seems you are not using superfiring turrets. Which is very odd. It might allow you to raise your flight deck above gun level, so turbulences are ruled out. But then your second turret is between A turret and a high rising (top weight?) superstructure/flight deck combo. What kind of arc would that gun mount have? A very limited at best. So why instal it at all and waste the weight?

Btw, the best hyprid-carrier in WesWorld probably was/is the Indian URUMI class. She has her guns aft...

Don't know, but something's really odd about your Scheme 5. I'd really like to see a drawing... And while we are at it, do you consider 80 shells per barrel sufficient? Why?

Quoted

Originally posted by Logi

Quoted

Usually the result is: Not worth it. They get the worst of two worlds, not enough planes and handling space, not enough guns and armor. Why would it be different with your design?

Given that ships of Wesworld in the 17,000t-23,000t are all heavy cruisers with armaments of 200m-230m guns. Would you characterize a 17,000t ship with 8x280mm guns as inadequate in firepower? I wouldn't.

You missed my point. 8x28cm is impressive on a ship her size. The point I was to make is that a hyprid-carrier always is a compromise, even more so than any normal warship is anyway. Here you do not have armamant compete with propulsion and armour alone, armament also competes with weight and size distributed to aircraft facilities. You also add the potential hazard of avgas fire to the ship As a result your ship will be less effective than a true cruiser or carrier and it cannot compensate being a true multi-role vessel because no role it really fits and succeeds in.

Quoted

Originally posted by Logi
Now the airwing is much reduced compared to that of a 17,000t pure carrier (15 vs 40-50). But it is not an insignificant number.

Well, yes. For scouting and some anti-submarine patrol...

Quoted

Originally posted by Logi
The difference with the design offers utility through it's small displacement and heavy firepower. It's armor is not inferior to that of the heavy cruisers and it's firepower far superior. Then the air wing is an added bonus. It pays the price of light cruiser fuel range in exchange.

See above. Can you proof your claims?

Quoted

Originally posted by Logi
Why is this a better idea than a pure pocket battleship?
The recoil of 8x280mm is very high, so high that you are forced into a hull of 16,000t and above if you attempt to keep the fleet speed of 32 kn.

Not sure if I can follow you here. The historical Deutschland featured 6x 18cm in triples on a long and slender cruiser hull and never had any troubles with recoil forces regarding hull strength or stability. And how is this related to speed? The Deutschland made up to 28 knots, so the difference it not great.

Also, who says you only fire full broadsides? If you don't stress is much reduced and you can use a ladder system increasing accuracy and keeping your opponent under constant fire....

So your argument is "a larger hull is better than a smaller hull"? No need to argue, but then again, why limit your design to something under 20,000 tons?

Quoted

Originally posted by Logi
In other words, the hull cannot go smaller, but it also has a large amount of deck space unused.

Drawing? You also need deckspace for other equippment. It's not only main guns...

Quoted

Originally posted by Logi
Taking this deck space and using it for flight operations is a minimal additional cost to the ship. Also, as you know, the cost of aircraft in weight is exponential so a small airwing complement has a virtue on all it's own.

Since the ship was already intended to be a fleet attachment that bolsters a task force's firepower, the added ability to conduct Recon/ASW/CAP for minimal cost is a good thing IMO.

Guess I disagree...