A very strange, fast Japanese light cruiser: Jap/CL/1927

I wanted a smaller vessel that could make 36 knots, but I got a large ship that could make 35 knots. The problem is the SHP/ton generated by Springsharp. Springsharp gave it 31.68 SHP/ton of machinery weight. Japanese light cruisers built in the early 1920's had much higher output machinery for the weight. The place for the straight word on this is Japanese Cruisers of the Pacific War. This is the report for my light cruiser:

Jap/CL/1927, Japan Enter ship type laid down 1927

Displacement:
	10,823 t light; 11,185 t standard; 12,040 t normal; 12,724 t full load

Dimensions: Length overall / water x beam x draught
	607.05 ft / 605.00 ft x 57.00 ft x 26.00 ft (normal load)
	185.03 m / 184.40 m x 17.37 m  x 7.92 m

Armament:
      9 - 5.50" / 140 mm guns (3x3 guns), 83.19lbs / 37.73kg shells, 1927 Model
	  Quick firing guns in turrets (on barbettes)
	  on centreline ends, majority forward, all raised mounts - superfiring
      8 - 5.00" / 127 mm guns (4x2 guns), 62.50lbs / 28.35kg shells, 1927 Model
	  Dual purpose guns in deck mounts with hoists
	  on side, evenly spread, all raised mounts
      21 - 0.98" / 25.0 mm guns (7x3 guns), 0.48lbs / 0.22kg shells, 1927 Model
	  Dual purpose guns in deck mounts with hoists
	  on side ends, majority forward, all raised mounts - superfiring
	Weight of broadside 1,259 lbs / 571 kg
	Shells per gun, main battery: 160
	8 - 24.0" / 609.6 mm above water torpedoes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	3.00" / 76 mm	480.00 ft / 146.30 m	12.00 ft / 3.66 m
	Ends:	Unarmoured
	  Main Belt covers 122 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
		1.00" / 25 mm	480.00 ft / 146.30 m	17.00 ft / 5.18 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	      -			      -

   - Armour deck: 2.00" / 51 mm, Conning tower: 4.00" / 102 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 4 shafts, 132,495 shp / 98,841 Kw = 35.00 kts
	Range 6,500nm at 14.00 kts
	Bunker at max displacement = 1,539 tons

Complement:
	574 - 747

Cost:
	£3.987 million / $15.949 million

Distribution of weights at normal displacement:
	Armament: 157 tons, 1.3 %
	Armour: 2,126 tons, 17.7 %
	   - Belts: 695 tons, 5.8 %
	   - Torpedo bulkhead: 302 tons, 2.5 %
	   - Armament: 256 tons, 2.1 %
	   - Armour Deck: 828 tons, 6.9 %
	   - Conning Tower: 45 tons, 0.4 %
	Machinery: 4,182 tons, 34.7 %
	Hull, fittings & equipment: 4,357 tons, 36.2 %
	Fuel, ammunition & stores: 1,218 tons, 10.1 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  8,845 lbs / 4,012 Kg = 106.3 x 5.5 " / 140 mm shells or 1.3 torpedoes
	Stability (Unstable if below 1.00): 1.16
	Metacentric height 2.9 ft / 0.9 m
	Roll period: 14.2 seconds
	Steadiness	- As gun platform (Average = 50 %): 53 %
			- Recoil effect (Restricted arc if above 1.00): 0.42
	Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
	Hull has a flush deck
	Block coefficient: 0.470
	Length to Beam Ratio: 10.61 : 1
	'Natural speed' for length: 24.60 kts
	Power going to wave formation at top speed: 59 %
	Trim (Max stability = 0, Max steadiness = 100): 51
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 1.00 ft / 0.30 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		30.00 ft / 9.14 m
	   - Forecastle (20 %):	20.00 ft / 6.10 m
	   - Mid (50 %):		20.00 ft / 6.10 m
	   - Quarterdeck (15 %):	20.00 ft / 6.10 m
	   - Stern:		20.00 ft / 6.10 m
	   - Average freeboard:	20.80 ft / 6.34 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 189.4 %
		- Above water (accommodation/working, high = better): 117.5 %
	Waterplane Area: 22,371 Square feet or 2,078 Square metres
	Displacement factor (Displacement / loading): 102 %
	Structure weight / hull surface area: 105 lbs/sq ft or 513 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.94
		- Longitudinal: 1.65
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is adequate