A very fast Japanese Light Cruiser: Jap/CL/1933

16cm (6.3in) guns were a good pre-dreadnought caliber. I thought it would appropriate for a light cruiser. The original design for the Mogami class wanted 37 knots, so I thought that speed would be appropriate for this ship. The main thing wrong is that the power to weight for the machinery is too low (34.32 SHP/ton), so I had to distort the design to get both sufficient strenght and seakeeping ability.

Jap/CL/1933, Japan Light Cruiser laid down 1933

Displacement:
	15,051 t light; 15,594 t standard; 16,871 t normal; 17,892 t full load

Dimensions: Length overall / water x beam x draught
	672.08 ft / 669.00 ft x 63.00 ft x 30.00 ft (normal load)
	204.85 m / 203.91 m x 19.20 m  x 9.14 m

Armament:
      9 - 6.30" / 160 mm guns (3x3 guns), 124.98lbs / 56.69kg shells, 1933 Model
	  Quick firing 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, 1933 Model
	  Dual purpose guns in deck mounts with hoists
	  on side ends, evenly spread, all raised mounts - superfiring
      33 - 0.98" / 25.0 mm guns (11x3 guns), 0.48lbs / 0.22kg shells, 1933 Model
	  Anti-aircraft guns in deck mounts 
	  on side ends, majority forward, all raised mounts - superfiring
	Weight of broadside 1,891 lbs / 858 kg
	Shells per gun, main battery: 180
	8 - 24.0" / 609.6 mm above water torpedoes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	3.00" / 76 mm	435.00 ft / 132.59 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	435.00 ft / 132.59 m	19.00 ft / 5.79 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	4.00" / 102 mm	3.00" / 76 mm		3.00" / 76 mm
	2nd:	1.00" / 25 mm	1.00" / 25 mm		1.00" / 25 mm

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

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 4 shafts, 196,114 shp / 146,301 Kw = 37.00 kts
	Range 8,400nm at 14.00 kts
	Bunker at max displacement = 2,298 tons

Complement:
	739 - 962

Cost:
	£7.210 million / $28.842 million

Distribution of weights at normal displacement:
	Armament: 236 tons, 1.4 %
	Armour: 3,079 tons, 18.3 %
	   - Belts: 863 tons, 5.1 %
	   - Torpedo bulkhead: 306 tons, 1.8 %
	   - Armament: 340 tons, 2.0 %
	   - Armour Deck: 1,514 tons, 9.0 %
	   - Conning Tower: 57 tons, 0.3 %
	Machinery: 5,714 tons, 33.9 %
	Hull, fittings & equipment: 6,021 tons, 35.7 %
	Fuel, ammunition & stores: 1,820 tons, 10.8 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  12,285 lbs / 5,572 Kg = 98.3 x 6.3 " / 160 mm shells or 1.6 torpedoes
	Stability (Unstable if below 1.00): 1.12
	Metacentric height 3.1 ft / 0.9 m
	Roll period: 15.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 55 %
			- Recoil effect (Restricted arc if above 1.00): 0.49
	Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
	Hull has a flush deck
	Block coefficient: 0.467
	Length to Beam Ratio: 10.62 : 1
	'Natural speed' for length: 25.87 kts
	Power going to wave formation at top speed: 59 %
	Trim (Max stability = 0, Max steadiness = 100): 55
	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:		31.00 ft / 9.45 m
	   - Forecastle (20 %):	22.00 ft / 6.71 m
	   - Mid (50 %):		22.00 ft / 6.71 m
	   - Quarterdeck (15 %):	22.00 ft / 6.71 m
	   - Stern:		22.00 ft / 6.71 m
	   - Average freeboard:	22.72 ft / 6.93 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 177.4 %
		- Above water (accommodation/working, high = better): 128.2 %
	Waterplane Area: 27,271 Square feet or 2,534 Square metres
	Displacement factor (Displacement / loading): 103 %
	Structure weight / hull surface area: 118 lbs/sq ft or 578 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.95
		- Longitudinal: 1.69
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is excellent