Excellent work Tigerhunter & Shigure, very cool designs (and camos)!
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@ Krakatoa:
To be honest, I thought I'd save some considerable weight, when going for the 10-barrel version. (and I thought it looked cooler...
)
When I calculated your proposal in springsharp, I found out, that it did not save as much as I hoped. With a few minor tweaks, I was able to easily build a 4x3 variant.
Makes me wonder, though, why the proposed 15cm Seydlitz CLs would have had a displacement of around ~15000ts. (other than being excessively overengineered/equipped...)
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Garlicdesigns' suggested 17cm version made me curious myself, so I decided to draw a "Medium"/Heavy cruiser variant of my Wiesbaden-class.
(The camo is based on a scheme worn by either T-22 or T-23 in 1943.)
Honestly, I don't really know what to think of it.
According to springsharp, I've made a smaller, marginally faster, yet more heavily armored version of the Hipper. The trade-offs, are a weaker main-, DP- and torpedo-armament.
Report (wish you could still hide this stuff as "spoiler"):
Rostock, Germany Heavy Cruiser laid down 1939
Displacement:
9.638 t light; 9.981 t standard; 11.140 t normal; 12.067 t full load
Dimensions: Length overall / water x beam x draught
625,48 ft / 598,92 ft x 62,99 ft x 20,67 ft (normal load)
190,65 m / 182,55 m x 19,20 m x 6,30 m
Armament:
8 - 6,81" / 173 mm guns (4x2 guns), 157,98lbs / 71,66kg shells, 1939 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts - superfiring
8 - 4,13" / 105 mm guns (4x2 guns), 35,32lbs / 16,02kg shells, 1930 Model
Dual purpose guns in deck mounts
on side, all amidships, all raised mounts - superfiring
16 - 1,46" / 37,0 mm guns (8x2 guns), 1,55lbs / 0,70kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
21 - 0,79" / 20,0 mm guns (9 mounts), 0,24lbs / 0,11kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised guns
Weight of broadside 1.576 lbs / 715 kg
Shells per gun, main battery: 130
6 - 21,0" / 533 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4,33" / 110 mm 376,18 ft / 114,66 m 10,33 ft / 3,15 m
Ends: 0,79" / 20 mm 220,90 ft / 67,33 m 9,51 ft / 2,90 m
1,84 ft / 0,56 m Unarmoured ends
Main Belt covers 97% of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
0,79" / 20 mm 376,18 ft / 114,66 m 18,47 ft / 5,63 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4,72" / 120 mm 2,76" / 70 mm 4,33" / 110 mm
2nd: 0,79" / 20 mm - -
- Armour deck: 1,97" / 50 mm, Conning tower: 4,72" / 120 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 101.254 shp / 75.536 Kw = 32,90 kts
Range 6.000nm at 18,00 kts
Bunker at max displacement = 2.086 tons
Complement:
541 - 704
Cost:
£5,157 million / $20,628 million
Distribution of weights at normal displacement:
Armament: 197 tons, 1,8%
Armour: 2.350 tons, 21,1%
- Belts: 769 tons, 6,9%
- Torpedo bulkhead: 202 tons, 1,8%
- Armament: 413 tons, 3,7%
- Armour Deck: 915 tons, 8,2%
- Conning Tower: 51 tons, 0,5%
Machinery: 2.740 tons, 24,6%
Hull, fittings & equipment: 4.301 tons, 38,6%
Fuel, ammunition & stores: 1.502 tons, 13,5%
Miscellaneous weights: 50 tons, 0,4%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13.272 lbs / 6.020 Kg = 84,0 x 6,8 " / 173 mm shells or 2,1 torpedoes
Stability (Unstable if below 1.00): 1,04
Metacentric height 2,7 ft / 0,8 m
Roll period: 16,1 seconds
Steadiness - As gun platform (Average = 50 %): 65 %
- Recoil effect (Restricted arc if above 1.00): 0,44
Seaboat quality (Average = 1.00): 0,93
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,500
Length to Beam Ratio: 9,51 : 1
'Natural speed' for length: 24,47 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 30,80 degrees
Stern overhang: 9,84 ft / 3,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28,05 ft / 8,55 m
- Forecastle (19%): 20,18 ft / 6,15 m
- Mid (50%): 18,21 ft / 5,55 m
- Quarterdeck (18%): 18,21 ft / 5,55 m
- Stern: 19,19 ft / 5,85 m
- Average freeboard: 19,57 ft / 5,97 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 138,1%
- Above water (accommodation/working, high = better): 147,3%
Waterplane Area: 25.137 Square feet or 2.335 Square metres
Displacement factor (Displacement / loading): 118%
Structure weight / hull surface area: 109 lbs/sq ft or 532 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,98
- Longitudinal: 1,19
- Overall: 1,00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather