Yam's Momiji RFP - Calder Republic 1920 Bidding

Momiji Export Proposal, Calder Republic Cruiser Chaser laid down 1920

Displacement:
	9,672 t light; 10,042 t standard; 11,117 t normal; 11,977 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(614.28 ft / 603.67 ft) x 65.62 ft x (19.69 / 20.83 ft)
	(187.23 m / 184.00 m) x 20.00 m  x (6.00 / 6.35 m)

Armament:
      6 - 6.50" / 165 mm 55.0 cal guns - 154.32lbs / 70.00kg shells, 110 per gun
	  Quick firing guns in turret on barbette mounts, 1920 Model
	  2 x Twin mounts on centreline, forward deck forward
		1 raised mount - superfiring
	  1 x Twin mount on centreline, aft deck aft
      6 - 5.12" / 130 mm 50.0 cal guns - 59.52lbs / 27.00kg shells, 400 per gun
	  Quick firing guns in deck mounts, 1907 Model
	  4 x Twin mounts on sides, aft evenly spread
		2 raised mounts
	  2 x Twin mounts on sides, forward deck aft
      4 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 400 per gun
	  Anti-air guns in deck mounts, 1913 Model
	  4 x Single mounts on sides, evenly spread
      Weight of broadside 1,336 lbs / 606 kg
      Main Torpedoes
      4 - 21.0" / 533 mm, 23.10 ft / 7.04 m torpedoes - 1.486 t each, 5.944 t total
	In 2 sets of deck mounted side rotating tubes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	5.31" / 135 mm	467.26 ft / 142.42 m	9.71 ft / 2.96 m
	Ends:	2.95" / 75 mm	136.42 ft / 41.58 m	9.71 ft / 2.96 m
	  Main Belt covers 119 % of normal length
	  Main Belt inclined -4.00 degrees (positive = in)

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		2.95" / 75 mm	467.26 ft / 142.42 m	17.29 ft / 5.27 m
	Beam between torpedo bulkheads 54.13 ft / 16.50 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	5.51" / 140 mm	2.36" / 60 mm		5.31" / 135 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 1.97" / 50 mm
	Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 5.31" / 135 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 84,949 shp / 63,372 Kw = 31.50 kts
	Range 7,000nm at 15.00 kts
	Bunker at max displacement = 1,934 tons

Complement:
	540 - 703

Cost:
	£2.085 million / $8.340 million

Distribution of weights at normal displacement:
	Armament: 338 tons, 3.0 %
	   - Guns: 326 tons, 2.9 %
	   - Weapons: 12 tons, 0.1 %
	Armour: 3,258 tons, 29.3 %
	   - Belts: 1,113 tons, 10.0 %
	   - Torpedo bulkhead: 883 tons, 7.9 %
	   - Armament: 286 tons, 2.6 %
	   - Armour Deck: 919 tons, 8.3 %
	   - Conning Tower: 57 tons, 0.5 %
	Machinery: 2,970 tons, 26.7 %
	Hull, fittings & equipment: 3,007 tons, 27.0 %
	Fuel, ammunition & stores: 1,445 tons, 13.0 %
	Miscellaneous weights: 100 tons, 0.9 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  14,760 lbs / 6,695 Kg = 107.7 x 6.5 " / 165 mm shells or 2.1 torpedoes
	Stability (Unstable if below 1.00): 1.39
	Metacentric height 4.7 ft / 1.4 m
	Roll period: 12.7 seconds
	Steadiness	- As gun platform (Average = 50 %): 54 %
			- Recoil effect (Restricted arc if above 1.00): 0.19
	Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
	Hull has rise forward of midbreak,
	  a straight bulbous bow and a cruiser stern
	Block coefficient (normal/deep): 0.499 / 0.508
	Length to Beam Ratio: 9.20 : 1
	'Natural speed' for length: 24.57 kts
	Power going to wave formation at top speed: 56 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 22.00 degrees
	Stern overhang: -4.92 ft / -1.50 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	11.30 %,  26.25 ft / 8.00 m,  22.97 ft / 7.00 m
	   - Forward deck:	24.00 %,  22.97 ft / 7.00 m,  21.00 ft / 6.40 m
	   - Aft deck:	53.40 %,  16.08 ft / 4.90 m,  16.08 ft / 4.90 m
	   - Quarter deck:	11.30 %,  16.08 ft / 4.90 m,  16.08 ft / 4.90 m
	   - Average freeboard:		18.42 ft / 5.61 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 118.9 %
		- Above water (accommodation/working, high = better): 163.5 %
	Waterplane Area: 26,368 Square feet or 2,450 Square metres
	Displacement factor (Displacement / loading): 106 %
	Structure weight / hull surface area: 103 lbs/sq ft or 502 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.99
		- Longitudinal: 1.08
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Excellent accommodation and workspace room

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Misc Weight:
x2 Rotating Gunpowder Catapults  = 40tons
x3 Floatplanes = 60 tons