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-624140575Requested 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:

Ł7,672 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