WesWorld

Here's a battlecruiser design I came up with. It has a very high top speed and plenty of weapons and ammunition storage, and is something of a commerce raider.

Polish Battlecruiser, Poland Battlecruiser laid down 1940

Displacement:
39,086 t light; 41,363 t standard; 45,303 t normal; 48,455 t full load

Dimensions: Length overall / water x beam x draught
872.70 ft / 872.70 ft x 105.32 ft (Bulges 111.88 ft) x 29.53 ft (normal load)
266.00 m / 266.00 m x 32.10 m (Bulges 34.10 m) x 9.00 m

Armament:
6 - 16.00" / 406 mm guns (3x2 guns), 2,048.00lbs / 928.96kg shells, 1940 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 5.00" / 127 mm guns (8x2 guns), 62.50lbs / 28.35kg shells, 1940 Model
Breech loading guns in deck mounts with hoists
on side ends, evenly spread
64 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, 4 raised mounts - superfiring
48 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 13,424 lbs / 6,089 kg
Shells per gun, main battery: 180

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.0" / 254 mm 530.00 ft / 161.54 m 16.50 ft / 5.03 m
Ends: Unarmoured
Main Belt covers 93 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Torpedo Bulkhead and Bulges:
1.00" / 25 mm 530.00 ft / 161.54 m 27.10 ft / 8.26 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.0" / 356 mm 9.00" / 229 mm 12.0" / 305 mm
2nd: 6.00" / 152 mm 3.00" / 76 mm 6.00" / 152 mm

- Armour deck: 4.00" / 102 mm, Conning tower: 14.00" / 356 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 240,835 shp / 179,663 Kw = 35.00 kts
Range 22,000nm at 12.00 kts
Bunker at max displacement = 7,091 tons

Complement:
1,552 - 2,018

Cost:
£22.075 million / $88.299 million

Distribution of weights at normal displacement:
Armament: 1,678 tons, 3.7 %
Armour: 12,540 tons, 27.7 %
- Belts: 3,759 tons, 8.3 %
- Torpedo bulkhead: 531 tons, 1.2 %
- Armament: 2,924 tons, 6.5 %
- Armour Deck: 4,942 tons, 10.9 %
- Conning Tower: 383 tons, 0.8 %
Machinery: 6,439 tons, 14.2 %
Hull, fittings & equipment: 18,428 tons, 40.7 %
Fuel, ammunition & stores: 6,218 tons, 13.7 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
69,142 lbs / 31,362 Kg = 33.8 x 16.0 " / 406 mm shells or 8.7 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 7.8 ft / 2.4 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.40
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 7.80 : 1
'Natural speed' for length: 34.20 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.48 ft / 9.90 m
- Forecastle (20 %): 26.25 ft / 8.00 m
- Mid (50 %): 26.25 ft / 8.00 m
- Quarterdeck (15 %): 26.25 ft / 8.00 m
- Stern: 26.25 ft / 8.00 m
- Average freeboard: 26.75 ft / 8.15 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.7 %
- Above water (accommodation/working, high = better): 215.1 %
Waterplane Area: 66,778 Square feet or 6,204 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 196 lbs/sq ft or 955 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.17
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

Interesting. But as a commerce raider, not my cup of tea! And Poland isn't going to get very far with commerce raiders anyway.

Nice design BUT ...

Quoted

Main Belt covers 93 % of normal length
Main belt does not fully cover magazines and engineering spaces

Not really a good option ..... KABOOOOOM

Quoted

Not really a good option ..... KABOOOOOM

Looking at the sim's "Space - Hull below water" line, the difference is minimal so it is most likely the result of slightly tweaking the design without correcting the length of the belt.

Quoted

Originally posted by Rooijen10

Quoted

Not really a good option ..... KABOOOOOM

Looking at the sim's "Space - Hull below water" line, the difference is minimal so it is most likely the result of slightly tweaking the design without correcting the length of the belt.

Yeah, I added the AA guns last and forgot to increase the armor by a few meters to compensate.