Now for the fairly big, fast heavy cruiser: US/CA/1936

My concept for the heavy cruiser includes something larger than 8in guns. The most obvious choice for the US is the 10in gun. I decided on 9-10in, 12-5in DP guns, and 36 quad 40mm AA guns (admittedly, anachronistic for 1936). The dimensions ended up as 715ft (WL) x 80ft x 28ft. The armor basis is 7in, with a 3in deck. The speed is 34 knots, the best I could easily do. I played with the beam and draft to be able to get a 10,000 nm range and a cruising speed of 15 knots. The displacement is large: 22,467 tons Standard. I would think that the ship could do well against anything else that it might face. I even was able to get a 1in A/T bulkhead, but only after I realized I had omitted the height of the bulkhead, and had to rejigger everything to get adequate seakeeping and hull strength.

US/CA/1936, United States Heavy Cruiser laid down 1936

Displacement:
	21,526 t light; 22,477 t standard; 24,573 t normal; 26,250 t full load

Dimensions: Length overall / water x beam x draught
	718.12 ft / 715.00 ft x 80.00 ft x 28.00 ft (normal load)
	218.88 m / 217.93 m x 24.38 m  x 8.53 m

Armament:
    9 - 10.00" / 254 mm guns (3x3 guns), 500.00lbs / 226.80kg shells, 1936 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, majority forward, all raised mounts - superfiring
    12 - 5.00" / 127 mm guns (6x2 guns), 62.50lbs / 28.35kg shells, 1936 Model
	  Dual purpose guns in turrets (on barbettes)
	  on side, evenly spread, all raised mounts
    36 - 1.57" / 40.0 mm guns (9x4 guns), 1.95lbs / 0.89kg shells, 1936 Model
	  Anti-aircraft guns in deck mounts
	  on side, evenly spread, all raised mounts
	Weight of broadside 5,320 lbs / 2,413 kg
	Shells per gun, main battery: 150

Armour:
 - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	7.00" / 178 mm	465.00 ft / 141.73 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 100 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

 - Torpedo Bulkhead:
		1.00" / 25 mm	465.00 ft / 141.73 m	25.00 ft / 7.62 m

 - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	7.00" / 178 mm	4.00" / 102 mm		6.00" / 152 mm
	2nd:	2.00" / 51 mm	1.00" / 25 mm		2.00" / 51 mm

 - Armour deck: 3.00" / 76 mm, Conning tower: 4.00" / 102 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 179,681 shp / 134,042 Kw = 34.00 kts
	Range 10,000nm at 15.00 kts
	Bunker at max displacement = 3,773 tons

Complement:
	980 - 1,275

Cost:
	£10.640 million / $42.559 million

Distribution of weights at normal displacement:
	Armament: 665 tons, 2.7 %
	Armour: 6,123 tons, 24.9 %
	   - Belts: 2,193 tons, 8.9 %
	   - Torpedo bulkhead: 430 tons, 1.8 %
	   - Armament: 1,238 tons, 5.0 %
	   - Armour Deck: 2,189 tons, 8.9 %
	   - Conning Tower: 73 tons, 0.3 %
	Machinery: 5,042 tons, 20.5 %
	Hull, fittings & equipment: 9,697 tons, 39.5 %
	Fuel, ammunition & stores: 3,047 tons, 12.4 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  31,120 lbs / 14,116 Kg = 62.2 x 10.0 " / 254 mm shells or 3.8 torpedoes
	Stability (Unstable if below 1.00): 1.08
	Metacentric height 4.1 ft / 1.3 m
	Roll period: 16.5 seconds
	Steadiness	- As gun platform (Average = 50 %): 51 %
			- Recoil effect (Restricted arc if above 1.00): 0.68
	Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
	Hull has a flush deck
	Block coefficient: 0.537
	Length to Beam Ratio: 8.94 : 1
	'Natural speed' for length: 26.74 kts
	Power going to wave formation at top speed: 58 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 2.00 ft / 0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		32.00 ft / 9.75 m
	   - Forecastle (20 %):	25.00 ft / 7.62 m
	   - Mid (50 %):		25.00 ft / 7.62 m
	   - Quarterdeck (15 %):	25.00 ft / 7.62 m
	   - Stern:		25.00 ft / 7.62 m
	   - Average freeboard:	25.56 ft / 7.79 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 117.4 %
		- Above water (accommodation/working, high = better): 191.6 %
	Waterplane Area: 39,437 Square feet or 3,664 Square metres
	Displacement factor (Displacement / loading): 114 %
	Structure weight / hull surface area: 154 lbs/sq ft or 754 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.96
		- Longitudinal: 1.46
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is excellent