Project CL29 [1929] (Jayu)

Project CL29, Jayu Light Cruiser laid down 1929

Displacement:
	8,646 t light; 9,186 t standard; 9,905 t normal; 10,481 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(600.39 ft / 590.55 ft) x 59.06 ft x (19.69 / 20.52 ft)
	(183.00 m / 180.00 m) x 18.00 m  x (6.00 / 6.25 m)

Armament:
      9 - 6.54" / 166 mm 45.0 cal guns - 148.00lbs / 67.13kg shells, 300 per gun
	  Quick firing guns in deck and hoist mounts, 1929 Model
	  3 x 3-gun mounts on centreline ends, majority aft
		1 raised mount aft - superfiring
      8 - 4.37" / 111 mm 45.0 cal guns - 42.08lbs / 19.09kg shells, 450 per gun
	  Quick firing guns in deck and hoist mounts, 1926 Model
	  4 x Twin mounts on sides, evenly spread
      8 - 3.06" / 77.8 mm 45.0 cal guns - 14.44lbs / 6.55kg shells, 500 per gun
	  Anti-air guns in deck and hoist mounts, 1926 Model
	  4 x Twin mounts on sides, evenly spread
		4 raised mounts
      8 - 0.87" / 22.0 mm 45.0 cal guns - 0.33lbs / 0.15kg shells, 1,500 per gun
	  Anti-air guns in deck mounts, 1926 Model
	  8 x Single mounts on sides, evenly spread
      16 - 0.44" / 11.1 mm 45.0 cal guns - 0.04lbs / 0.02kg shells, 2,500 per gun
	  Anti-air guns in deck mounts, 1926 Model
	  8 x Twin mounts on sides, evenly spread
      Weight of broadside 1,787 lbs / 811 kg
      Main Torpedoes
      16 - 26.2" / 666 mm, 26.25 ft / 8.00 m torpedoes - 2.576 t each, 41.217 t total
	In 4 sets of deck mounted side rotating tubes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	4.37" / 111 mm	383.86 ft / 117.00 m	9.22 ft / 2.81 m
	Ends:	2.17" / 55 mm	206.66 ft / 62.99 m	9.22 ft / 2.81 m
	Upper:	2.17" / 55 mm	383.86 ft / 117.00 m	8.01 ft / 2.44 m
	  Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		2.17" / 55 mm	383.86 ft / 117.00 m	18.08 ft / 5.51 m
	Beam between torpedo bulkheads 45.93 ft / 14.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	3.03" / 77 mm	2.17" / 55 mm		2.17" / 55 mm
	2nd:	2.17" / 55 mm	2.17" / 55 mm		2.17" / 55 mm
	3rd:	2.17" / 55 mm	2.17" / 55 mm		2.17" / 55 mm
	4th:	0.87" / 22 mm	      -			      -
	5th:	0.44" / 11 mm	      -			      -

   - Armoured deck - multiple decks:
	For and Aft decks: 2.17" / 55 mm
	Forecastle: 1.30" / 33 mm  Quarter deck: 1.30" / 33 mm

   - Conning towers: Forward 4.37" / 111 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 2 shafts, 52,835 shp / 39,415 Kw = 29.40 kts
	Range 5,000nm at 15.00 kts
	Bunker at max displacement = 1,296 tons

Complement:
	496 - 645

Cost:
	£2.774 million / $11.098 million

Distribution of weights at normal displacement:
	Armament: 519 tons, 5.2 %
	   - Guns: 436 tons, 4.4 %
	   - Weapons: 82 tons, 0.8 %
	Armour: 2,771 tons, 28.0 %
	   - Belts: 1,063 tons, 10.7 %
	   - Torpedo bulkhead: 556 tons, 5.6 %
	   - Armament: 201 tons, 2.0 %
	   - Armour Deck: 907 tons, 9.2 %
	   - Conning Tower: 43 tons, 0.4 %
	Machinery: 1,623 tons, 16.4 %
	Hull, fittings & equipment: 3,584 tons, 36.2 %
	Fuel, ammunition & stores: 1,259 tons, 12.7 %
	Miscellaneous weights: 150 tons, 1.5 %
	   - Hull below water: 100 tons
	   - On freeboard deck: 50 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  16,640 lbs / 7,548 Kg = 119.2 x 6.5 " / 166 mm shells or 1.5 torpedoes
	Stability (Unstable if below 1.00): 1.15
	Metacentric height 3.0 ft / 0.9 m
	Roll period: 14.4 seconds
	Steadiness	- As gun platform (Average = 50 %): 62 %
			- Recoil effect (Restricted arc if above 1.00): 0.49
	Seaboat quality  (Average = 1.00): 1.24

Hull form characteristics:
	Hull has a flush deck,
	  an extended bulbous bow and large transom stern
	Block coefficient (normal/deep): 0.505 / 0.513
	Length to Beam Ratio: 10.00 : 1
	'Natural speed' for length: 27.72 kts
	Power going to wave formation at top speed: 52 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 0.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  26.74 ft / 8.15 m,  21.88 ft / 6.67 m
	   - Forward deck:	30.00 %,  21.88 ft / 6.67 m,  17.06 ft / 5.20 m
	   - Aft deck:	35.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
	   - Quarter deck:	15.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
	   - Average freeboard:		19.14 ft / 5.83 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 93.3 %
		- Above water (accommodation/working, high = better): 164.1 %
	Waterplane Area: 24,277 Square feet or 2,255 Square metres
	Displacement factor (Displacement / loading): 128 %
	Structure weight / hull surface area: 102 lbs/sq ft or 496 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.98
		- Longitudinal: 1.25
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily

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Made using Carb's Light Cruiser Calculator; actual speed is 35 knots (engine factor=.84)

Additional Weights:
-Heavy Crane
-Air Compressed Catapult
-2 Floatplanes with Hangars