It was quite some tiem since I last posted here as nowadays I rarely draw truly hypothetical not real world designs, but since my last post I've made same:
First the Karl von Muller class Big Gun Cruiser:
https://www.deviantart.com/tzoli/art/Karl-von-Muller-class-Big-Gun-Cruiser-624140575
Requested by a friend as a modified and slightly enlarged Deutschland style big gun cruiser with set armament calibres, dimensions, speed and armour.
The simulation:
Karl von Müller class, German Weimar Republic Big Gun Cruiser / Pocket Battleship laid down 1934 (Engine 1936)
Displacement:
14 479 t light; 15 449 t standard; 16 473 t normal; 17 292 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(621,04 ft / 606,96 ft) x 74,67 ft x (26,84 / 27,81 ft)
(189,29 m / 185,00 m) x 22,76 m x (8,18 / 8,48 m)
Armament:
6 - 11,30" / 287 mm 52,0 cal guns - 770,23lbs / 349,37kg shells, 125 per gun
Breech loading guns in turret on barbette mounts, 1934 Model
2 x 3-gun mounts on centreline, evenly spread
16 - 5,79" / 147 mm 55,0 cal guns - 104,61lbs / 47,45kg shells, 150 per gun
Dual purpose guns in turret on barbette mounts, 1934 Model
2 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
6 x Twin mounts on sides, evenly spread
28 - 1,57" / 40,0 mm 83,0 cal guns - 2,25lbs / 1,02kg shells, 4 000 per gun
Anti-air guns in deck mounts, 1934 Model
4 x Twin mounts on centreline ends, evenly spread
3 raised mounts - superfiring
10 x Twin mounts on side ends, majority forward
6 raised mounts - superfiring
36 - 1,06" / 27,0 mm 65,0 cal guns - 0,66lbs / 0,30kg shells, 3 000 per gun
Anti-air guns in deck mounts, 1934 Model
8 x Quad mounts on centreline ends, evenly spread
2 raised mounts - superfiring
1 x Quad mount on centreline, aft deck aft
Weight of broadside 6 382 lbs / 2 895 kg
Main Torpedoes
12 - 22,0" / 559 mm, 24,61 ft / 7,50 m torpedoes - 1,774 t each, 21,292 t total
In 4 sets of deck mounted centre rotating tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5,59" / 142 mm 401,90 ft / 122,50 m 10,37 ft / 3,16 m
Ends: 2,76" / 70 mm 205,05 ft / 62,50 m 10,37 ft / 3,16 m
Upper: 1,57" / 40 mm 401,90 ft / 122,50 m 8,01 ft / 2,44 m
Main Belt covers 102 % of normal length
Main Belt inclined 13,50 degrees (positive = in)
- Torpedo Bulkhead - Strengthened structural bulkheads:
2,76" / 70 mm 394,52 ft / 120,25 m 18,04 ft / 5,50 m
Beam between torpedo bulkheads 72,18 ft / 22,00 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: 5,91" / 150 mm 2,95" / 75 mm 4,72" / 120 mm
2nd: 0,98" / 25 mm 0,98" / 25 mm 0,98" / 25 mm
- Box over machinery & magazines:
4,61" / 117 mm
Forecastle: 1,18" / 30 mm Quarter deck: 1,18" / 30 mm
- Conning towers: Forward 3,94" / 100 mm, Aft 1,97" / 50 mm
Machinery:
Oil fired boilers, steam turbines, plus diesel motors,
Geared drive, 2 shafts, 90 000 shp / 67 140 Kw = 30,08 kts
Range 9 999nm at 12,00 kts
Bunker at max displacement = 1 843 tons
Complement:
726 - 945
Cost:
£7,672 million / $30,688 million
Distribution of weights at normal displacement:
Armament: 1 762 tons, 10,7 %
- Guns: 1 719 tons, 10,4 %
- Weapons: 43 tons, 0,3 %
Armour: 4 619 tons, 28,0 %
- Belts: 1 396 tons, 8,5 %
- Torpedo bulkhead: 726 tons, 4,4 %
- Armament: 604 tons, 3,7 %
- Armour Deck: 1 810 tons, 11,0 %
- Conning Towers: 82 tons, 0,5 %
Machinery: 2 525 tons, 15,3 %
Hull, fittings & equipment: 5 396 tons, 32,8 %
Fuel, ammunition & stores: 1 993 tons, 12,1 %
Miscellaneous weights: 177 tons, 1,1 %
- Hull below water: 25 tons
- Hull void weights: 55 tons
- Hull above water: 22 tons
- On freeboard deck: 45 tons
- Above deck: 30 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
21 175 lbs / 9 605 Kg = 29,4 x 11,3 " / 287 mm shells or 2,3 torpedoes
Stability (Unstable if below 1.00): 1,15
Metacentric height 4,2 ft / 1,3 m
Roll period: 15,3 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0,78
Seaboat quality (Average = 1.00): 1,18
Hull form characteristics:
Hull has low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0,474 / 0,480
Length to Beam Ratio: 8,13 : 1
'Natural speed' for length: 24,64 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 16,00 degrees
Stern overhang: 6,56 ft / 2,00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15,00 %, 26,25 ft / 8,00 m, 24,11 ft / 7,35 m
- Forward deck: 34,34 %, 24,11 ft / 7,35 m, 22,31 ft / 6,80 m
- Aft deck: 34,34 %, 22,31 ft / 6,80 m, 22,31 ft / 6,80 m
- Quarter deck: 16,32 %, 15,26 ft / 4,65 m, 15,58 ft / 4,75 m
- Average freeboard: 21,89 ft / 6,67 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93,2 %
- Above water (accommodation/working, high = better): 130,8 %
Waterplane Area: 29 504 Square feet or 2 741 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 149 lbs/sq ft or 728 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,93
- Longitudinal: 1,93
- Overall: 1,00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
