Yuighan-Class Battleship [1896] (Seondok)

Yuighan-Class, Seondok County Battleship laid down 1896

Displacement:
	11,816 t light; 12,500 t standard; 13,818 t normal; 14,872 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(366.00 ft / 360.00 ft) x 85.00 ft x (27.00 / 28.67 ft)
	(111.56 m / 109.73 m) x 25.91 m  x (8.23 / 8.74 m)

Armament:
      4 - 13.50" / 343 mm 42.0 cal guns - 1,227.64lbs / 556.85kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1896 Model
	  2 x Twin mounts on centreline ends, evenly spread
      16 - 5.33" / 135 mm 40.0 cal guns - 72.56lbs / 32.91kg shells, 175 per gun
	  Quick firing guns in casemate mounts, 1891 Model
	  16 x Single mounts on sides, evenly spread
		8 hull mounts in casemates- Limited use in all but light seas
      10 - 3.00" / 76.2 mm 40.0 cal guns - 12.94lbs / 5.87kg shells, 200 per gun
	  Quick firing guns in deck mounts, 1892 Model
	  10 x Single mounts on sides, evenly spread
		10 raised mounts
      8 - 1.50" / 38.1 mm 40.0 cal guns - 1.59lbs / 0.72kg shells, 500 per gun
	  Quick firing guns in deck mounts, 1888 Model
	  8 x Single mounts on centreline ends, evenly spread
      4 - 2.00" / 50.8 mm 45.0 cal guns - 4.03lbs / 1.83kg shells, 500 per gun
	  Quick firing guns in deck mounts, 1894 Model
	  4 x Single mounts on sides, evenly spread
		4 raised mounts
      Weight of broadside 6,230 lbs / 2,826 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	16.5" / 419 mm	234.00 ft / 71.32 m	11.06 ft / 3.37 m
	Ends:	8.00" / 203 mm	125.98 ft / 38.40 m	11.06 ft / 3.37 m
	Upper:	8.00" / 203 mm	234.00 ft / 71.32 m	8.00 ft / 2.44 m
	  Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		2.00" / 51 mm	234.00 ft / 71.32 m	25.29 ft / 7.71 m
	Beam between torpedo bulkheads 72.00 ft / 21.95 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	10.0" / 254 mm	8.00" / 203 mm		16.0" / 406 mm
	2nd:	4.00" / 102 mm	1.00" / 25 mm		4.00" / 102 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 2.00" / 51 mm
	Forecastle: 1.50" / 38 mm  Quarter deck: 1.50" / 38 mm

   - Conning towers: Forward 16.00" / 406 mm, Aft 8.00" / 203 mm

Machinery:
	Coal fired boilers, complex reciprocating steam engines,
	Direct drive, 2 shafts, 9,121 ihp / 6,804 Kw = 16.00 kts
	Range 7,500nm at 10.00 kts
	Bunker at max displacement = 2,372 tons (100% coal)

Complement:
	636 - 828

Cost:
	£1.098 million / $4.393 million

Distribution of weights at normal displacement:
	Armament: 971 tons, 7.0 %
	   - Guns: 971 tons, 7.0 %
	Armour: 5,728 tons, 41.5 %
	   - Belts: 3,125 tons, 22.6 %
	   - Torpedo bulkhead: 438 tons, 3.2 %
	   - Armament: 1,082 tons, 7.8 %
	   - Armour Deck: 785 tons, 5.7 %
	   - Conning Towers: 298 tons, 2.2 %
	Machinery: 1,520 tons, 11.0 %
	Hull, fittings & equipment: 3,497 tons, 25.3 %
	Fuel, ammunition & stores: 2,002 tons, 14.5 %
	Miscellaneous weights: 100 tons, 0.7 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  19,673 lbs / 8,923 Kg = 16.0 x 13.5 " / 343 mm shells or 4.1 torpedoes
	Stability (Unstable if below 1.00): 1.44
	Metacentric height 7.4 ft / 2.3 m
	Roll period: 13.1 seconds
	Steadiness	- As gun platform (Average = 50 %): 79 %
			- Recoil effect (Restricted arc if above 1.00): 0.28
	Seaboat quality  (Average = 1.00): 1.58

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.585 / 0.593
	Length to Beam Ratio: 4.24 : 1
	'Natural speed' for length: 18.97 kts
	Power going to wave formation at top speed: 48 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -4.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  17.00 ft / 5.18 m,  15.00 ft / 4.57 m
	   - Forward deck:	30.00 %,  15.00 ft / 4.57 m,  13.00 ft / 3.96 m
	   - Aft deck:	35.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
	   - Quarter deck:	15.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
	   - Average freeboard:		13.86 ft / 4.22 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 80.3 %
		- Above water (accommodation/working, high = better): 89.0 %
	Waterplane Area: 22,073 Square feet or 2,051 Square metres
	Displacement factor (Displacement / loading): 103 %
	Structure weight / hull surface area: 146 lbs/sq ft or 715 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.90
		- Longitudinal: 2.66
		- Overall: 1.00
	Excellent machinery, storage, compartmentation space
	Cramped accommodation and workspace room
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather