1941 eh ? I got two designs for that time. Good god ! We are waaaaaaayyyyyyy ahead of everything with 1941, and these vessels will be finished late in the 40s, but what the hell...
I did just notice that all these designs are older designs and needed to be updated in regard of armament. The current version would use 130 mm (5.12 inch) guns instead of the 127mm guns (5 inch) in these designs. If I were to change the caliber, it could mean a minor decrease in range if hullstrength were to drop below 1.00.
The Mizuho (good for 122 planes) and Taiyo (that's Taiyo and not Taiho; good for 134 planes). They are somewhat lighter than your Cobram, but the advantage is that they would be operational sooner than your ships (50.3 months (1945) and 56.9 months (1945-1946) compared to your 66.7 months (1946-1947)).
The problem with these vessels is that they will need quite some materials, and if you were to have an extensive BB program and CA/CL program as well, you could have some serious problems building them. I think the only nation that would have not that much problems with such building programs would be the United States.
Mizuho, Japan Carrier laid down 1941
Displacement:
41,298 t light; 42,388 t standard; 50,359 t normal; 56,534 t full load
Loading submergence 1,863 tons/feet
Dimensions:
850.00 ft x 108.00 ft x 32.00 ft (normal load)
259.08 m x 32.92 m x 9.75 m
Armament:
12 - 5.00" / 127 mm guns (4 Main turrets x 3 guns)
54 - 1.97" / 50 mm AA guns
90 - 0.98" / 25 mm guns
Weight of broadside 999 lbs / 453 kg
Armour:
Belt 5.00" / 127 mm, ends unarmoured
Belts cover 94 % of normal area
Main turrets 1.00" / 25 mm, AA gun shields 1.00" / 25 mm, Light gun shields 1.00" / 25 mm
Armour deck 3.00" / 76 mm, Conning tower 5.00" / 127 mm
Torpedo bulkhead 2.00" / 51 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 243,100 shp / 181,352 Kw = 33.00 kts
Range 17,000nm at 18.00 kts
Complement:
1,680 - 2,185
Cost:
£15.144 million / $60.575 million
Distribution of weights at normal displacement:
Armament: 125 tons, 0.2 %
Armour: 6,594 tons, 13.1 %
Belts: 1,362 tons, 2.7 %, Armament: 158 tons, 0.3 %, Armour Deck: 3,618 tons, 7.2 %
Conning Tower: 148 tons, 0.3 %, Torpedo bulkhead: 1,308 tons, 2.6 %
Machinery: 6,424 tons, 12.8 %
Hull, fittings & equipment: 13,270 tons, 26.4 %
Fuel, ammunition & stores: 9,061 tons, 18.0 %
Miscellaneous weights: 14,884 tons, 29.6 %
Metacentric height 7.0
Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.13
Shellfire needed to sink: 55,021 lbs / 24,957 Kg = 880.3 x 5.0 " / 127 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 6.9
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 57 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.03
Relative quality as seaboat: 1.15
Hull form characteristics:
Block coefficient: 0.600
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 7.04
'Natural speed' for length: 29.15 kts
Power going to wave formation at top speed: 55 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 93.5 %
Relative accommodation and working space: 184.8 %
(Average = 100%)
Displacement factor: 143 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.01
(Structure weight / hull surface area: 142 lbs / square foot or 694 Kg / square metre)
Relative longitudinal hull strength: 1.00
(for 25.00 ft / 7.62 m average freeboard, freeboard adjustment 4.08 ft)
Relative composite hull strength: 1.00
Taiyo, Japan Carrier laid down 1941
Displacement:
47,831 t light; 49,059 t standard; 55,515 t normal; 60,459 t full load
Loading submergence 2,053 tons/feet
Dimensions:
920.00 ft x 110.00 ft x 32.00 ft (normal load)
280.42 m x 33.53 m x 9.75 m
Armament:
18 - 5.00" / 127 mm guns (6 Main turrets x 3 guns)
60 - 1.97" / 50 mm AA guns
120 - 0.98" / 25 mm guns
Weight of broadside 1,411 lbs / 640 kg
Armour:
Belt 6.00" / 152 mm, ends unarmoured
Belts cover 100 % of normal area
Main turrets 1.00" / 25 mm, AA gun shields 1.00" / 25 mm, Light gun shields 1.00" / 25 mm
Armour deck 3.00" / 76 mm, Conning tower 5.00" / 127 mm
Torpedo bulkhead 2.00" / 51 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 248,769 shp / 185,582 Kw = 33.00 kts
Range 13,000nm at 18.00 kts
Complement:
1,808 - 2,350
Cost:
£16.954 million / $67.818 million
Distribution of weights at normal displacement:
Armament: 176 tons, 0.3 %
Armour: 7,683 tons, 13.8 %
Belts: 1,886 tons, 3.4 %, Armament: 235 tons, 0.4 %, Armour Deck: 3,989 tons, 7.2 %
Conning Tower: 158 tons, 0.3 %, Torpedo bulkhead: 1,416 tons, 2.6 %
Machinery: 6,574 tons, 11.8 %
Hull, fittings & equipment: 15,441 tons, 27.8 %
Fuel, ammunition & stores: 7,684 tons, 13.8 %
Miscellaneous weights: 17,956 tons, 32.3 %
Metacentric height 6.6
Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
Good seaboat, rides out heavy weather easily
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.08
Shellfire needed to sink: 62,315 lbs / 28,266 Kg = 997.0 x 5.0 " / 127 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 7.5
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 67 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.05
Relative quality as seaboat: 1.35
Hull form characteristics:
Block coefficient: 0.600
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 7.38
'Natural speed' for length: 30.33 kts
Power going to wave formation at top speed: 52 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 93.8 %
Relative accommodation and working space: 212.0 %
(Average = 100%)
Displacement factor: 138 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.01
(Structure weight / hull surface area: 148 lbs / square foot or 721 Kg / square metre)
Relative longitudinal hull strength: 0.99
(for 28.00 ft / 8.53 m average freeboard, freeboard adjustment 6.66 ft)
Relative composite hull strength: 1.00
Walter