Yenhsieng-Class Battlecruiser [1910] (Seondok)

Yenhsieng-Class, Seondok County Battlecruiser laid down 1910

Displacement:
	19,488 t light; 20,500 t standard; 21,545 t normal; 22,381 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(662.73 ft / 656.17 ft) x 91.86 ft x (26.25 / 26.99 ft)
	(202.00 m / 200.00 m) x 28.00 m  x (8.00 / 8.23 m)

Armament:
      10 - 12.20" / 310 mm 47.0 cal guns - 945.54lbs / 428.89kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1904 Model
	  5 x Twin mounts on centreline, evenly spread
		2 raised mounts
      12 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 200 per gun
	  Quick firing guns in casemate mounts, 1904 Model
	  12 x Single mounts on sides, evenly spread
      8 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 500 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  8 x Single mounts on sides, evenly spread
		8 raised mounts
      Weight of broadside 9,951 lbs / 4,514 kg
      Main Torpedoes
      4 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.143 t each, 8.572 t total
	submerged bow & stern tubes
      2nd Torpedoes
      4 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.143 t each, 8.572 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	7.09" / 180 mm	487.20 ft / 148.50 m	11.52 ft / 3.51 m
	Ends:	3.94" / 100 mm	168.96 ft / 51.50 m	11.52 ft / 3.51 m
	Upper:	4.92" / 125 mm	487.20 ft / 148.50 m	8.01 ft / 2.44 m
	  Main Belt covers 114 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		2.95" / 75 mm	487.20 ft / 148.50 m	22.44 ft / 6.84 m
	Beam between torpedo bulkheads 65.62 ft / 20.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	11.8" / 300 mm	7.87" / 200 mm		7.87" / 200 mm
	2nd:	1.97" / 50 mm	0.98" / 25 mm		1.97" / 50 mm

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

   - Conning towers: Forward 7.87" / 200 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, steam turbines,
	Direct drive, 2 shafts, 59,324 shp / 44,256 Kw = 26.00 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,880 tons (100% coal)

Complement:
	888 - 1,155

Cost:
	£2.005 million / $8.022 million

Distribution of weights at normal displacement:
	Armament: 1,863 tons, 8.6 %
	   - Guns: 1,835 tons, 8.5 %
	   - Weapons: 28 tons, 0.1 %
	Armour: 7,250 tons, 33.7 %
	   - Belts: 2,721 tons, 12.6 %
	   - Torpedo bulkhead: 1,194 tons, 5.5 %
	   - Armament: 1,758 tons, 8.2 %
	   - Armour Deck: 1,445 tons, 6.7 %
	   - Conning Tower: 131 tons, 0.6 %
	Machinery: 2,697 tons, 12.5 %
	Hull, fittings & equipment: 7,579 tons, 35.2 %
	Fuel, ammunition & stores: 2,057 tons, 9.5 %
	Miscellaneous weights: 100 tons, 0.5 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  28,264 lbs / 12,820 Kg = 31.1 x 12.2 " / 310 mm shells or 3.0 torpedoes
	Stability (Unstable if below 1.00): 1.18
	Metacentric height 5.9 ft / 1.8 m
	Roll period: 15.8 seconds
	Steadiness	- As gun platform (Average = 50 %): 62 %
			- Recoil effect (Restricted arc if above 1.00): 0.57
	Seaboat quality  (Average = 1.00): 1.23

Hull form characteristics:
	Hull has low quarterdeck ,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.477 / 0.481
	Length to Beam Ratio: 7.14 : 1
	'Natural speed' for length: 25.62 kts
	Power going to wave formation at top speed: 46 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -4.00 degrees
	Stern overhang: -3.28 ft / -1.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	15.00 %,  23.79 ft / 7.25 m,  21.33 ft / 6.50 m
	   - Forward deck:	35.00 %,  21.33 ft / 6.50 m,  18.04 ft / 5.50 m
	   - Aft deck:	38.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Quarter deck:	12.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
	   - Average freeboard:		18.67 ft / 5.69 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 114.2 %
		- Above water (accommodation/working, high = better): 158.9 %
	Waterplane Area: 39,330 Square feet or 3,654 Square metres
	Displacement factor (Displacement / loading): 99 %
	Structure weight / hull surface area: 174 lbs/sq ft or 851 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.23
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily