Jungdo-Class Battleship [1895] (Seondok)

Jungdo-Class, Seondok County Battleship laid down 1895

Displacement:
	10,621 t light; 11,200 t standard; 12,051 t normal; 12,731 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(359.00 ft / 355.00 ft) x 80.00 ft x (24.00 / 25.13 ft)
	(109.42 m / 108.20 m) x 24.38 m  x (7.32 / 7.66 m)

Armament:
      4 - 12.00" / 305 mm 42.0 cal guns - 837.76lbs / 380.00kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1896 Model
	  2 x Twin mounts on centreline, evenly spread
      12 - 5.33" / 135 mm 40.0 cal guns - 72.56lbs / 32.91kg shells, 150 per gun
	  Quick firing guns in casemate mounts, 1891 Model
	  12 x Single mounts on sides, evenly spread
      12 - 4.50" / 114 mm 45.0 cal guns - 46.30lbs / 21.00kg shells, 200 per gun
	  Quick firing guns in casemate mounts, 1892 Model
	  12 x Single mounts on sides, evenly spread
      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 side ends, evenly spread
      Weight of broadside 4,920 lbs / 2,231 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	18.0" / 457 mm	230.75 ft / 70.33 m	10.73 ft / 3.27 m
	Ends:	6.00" / 152 mm	124.23 ft / 37.87 m	10.73 ft / 3.27 m
	Upper:	8.00" / 203 mm	230.75 ft / 70.33 m	8.00 ft / 2.44 m
	  Main Belt covers 100 % of normal length
	  Main Belt inclined 10.00 degrees (positive = in)

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		2.00" / 51 mm	230.75 ft / 70.33 m	22.80 ft / 6.95 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		14.0" / 356 mm
	2nd:	4.00" / 102 mm	1.00" / 25 mm		4.00" / 102 mm
	3rd:	3.00" / 76 mm	1.00" / 25 mm		3.00" / 76 mm
	5th:	1.00" / 25 mm	      -			      -

   - Armoured deck - multiple decks:
	For and Aft decks: 2.25" / 57 mm
	Forecastle: 1.00" / 25 mm  Quarter deck: 1.00" / 25 mm

   - Conning towers: Forward 15.00" / 381 mm, Aft 6.00" / 152 mm

Machinery:
	Coal fired boilers, complex reciprocating steam engines,
	Direct drive, 2 shafts, 7,539 ihp / 5,624 Kw = 15.50 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,531 tons (100% coal)

Complement:
	574 - 747

Cost:
	£0.912 million / $3.649 million

Distribution of weights at normal displacement:
	Armament: 811 tons, 6.7 %
	   - Guns: 811 tons, 6.7 %
	Armour: 5,468 tons, 45.4 %
	   - Belts: 3,073 tons, 25.5 %
	   - Torpedo bulkhead: 389 tons, 3.2 %
	   - Armament: 972 tons, 8.1 %
	   - Armour Deck: 795 tons, 6.6 %
	   - Conning Towers: 238 tons, 2.0 %
	Machinery: 1,278 tons, 10.6 %
	Hull, fittings & equipment: 3,065 tons, 25.4 %
	Fuel, ammunition & stores: 1,430 tons, 11.9 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  19,895 lbs / 9,024 Kg = 23.0 x 12.0 " / 305 mm shells or 4.2 torpedoes
	Stability (Unstable if below 1.00): 1.44
	Metacentric height 6.7 ft / 2.0 m
	Roll period: 13.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 98 %
			- Recoil effect (Restricted arc if above 1.00): 0.35
	Seaboat quality  (Average = 1.00): 1.96

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.619 / 0.624
	Length to Beam Ratio: 4.44 : 1
	'Natural speed' for length: 18.84 kts
	Power going to wave formation at top speed: 46 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -6.00 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 %,  22.00 ft / 6.71 m,  18.00 ft / 5.49 m
	   - Forward deck:	30.00 %,  18.00 ft / 5.49 m,  14.00 ft / 4.27 m
	   - Aft deck:	35.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
	   - Quarter deck:	15.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
	   - Average freeboard:		15.72 ft / 4.79 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 70.3 %
		- Above water (accommodation/working, high = better): 104.7 %
	Waterplane Area: 21,139 Square feet or 1,964 Square metres
	Displacement factor (Displacement / loading): 105 %
	Structure weight / hull surface area: 133 lbs/sq ft or 652 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.89
		- Longitudinal: 2.69
		- Overall: 1.00
	Excellent machinery, storage, compartmentation space
	Adequate 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