Doyi-Class Ironclad Battleship [1884] (Seondok)

Doyi-Class, Seondok County Ironclad Battleship laid down 1884

Displacement:
	9,388 t light; 10,000 t standard; 11,036 t normal; 11,865 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(334.65 ft / 328.08 ft) x 78.74 ft x (26.25 / 27.83 ft)
	(102.00 m / 100.00 m) x 24.00 m  x (8.00 / 8.48 m)

Armament:
      4 - 14.00" / 356 mm 20.0 cal guns - 1,102.31lbs / 500.00kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1883 Model
	  2 x Twin mounts on sides amidships
      4 - 8.00" / 203 mm 30.0 cal guns - 225.97lbs / 102.50kg shells, 100 per gun
	  Breech loading guns in casemate mounts, 1884 Model
	  4 x Single mounts on sides, evenly spread
		4 hull mounts in casemates- Limited use in all but light seas
      8 - 6.00" / 152 mm 30.0 cal guns - 88.18lbs / 40.00kg shells, 200 per gun
	  Breech loading guns in casemate mounts, 1883 Model
	  8 x Single mounts on sides, evenly spread
      12 - 2.00" / 50.8 mm 35.0 cal guns - 3.00lbs / 1.36kg shells, 300 per gun
	  Quick firing guns in deck mounts, 1886 Model
	  12 x Single mounts on sides, evenly spread
      8 - 2.50" / 63.5 mm 30.0 cal guns - 9.00lbs / 4.08kg shells, 300 per gun
	  Quick firing guns in deck mounts, 1886 Model
	  8 x Single mounts on sides, evenly spread
		8 raised mounts
      Weight of broadside 6,127 lbs / 2,779 kg
      Main Torpedoes
      4 - 17.7" / 450 mm, 13.12 ft / 4.00 m torpedoes - 0.264 t each, 1.055 t total
	In 4 sets of deck mounted carriage/fixed tubes
      2nd Torpedoes
      8 - 17.7" / 450 mm, 13.12 ft / 4.00 m torpedoes - 0.264 t each, 2.110 t total
	In 1 sets of deck mounted carriage/fixed tubes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	15.0" / 380 mm	180.45 ft / 55.00 m	10.66 ft / 3.25 m
	Ends:	Unarmoured
	  Main Belt covers 85 % of normal length
	  Main Belt inclined 10.00 degrees (positive = in)

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	180.45 ft / 55.00 m	24.38 ft / 7.43 m
	Beam between torpedo bulkheads 72.18 ft / 22.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	15.0" / 380 mm	7.87" / 200 mm		15.0" / 380 mm
	2nd:	5.91" / 150 mm	3.94" / 100 mm		7.87" / 200 mm
	3rd:	3.94" / 100 mm	2.95" / 75 mm		3.94" / 100 mm
	4th:	0.98" / 25 mm	      -			      -
	5th:	0.98" / 25 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 14.96" / 380 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, complex reciprocating steam engines,
	Direct drive, 2 shafts, 8,631 ihp / 6,438 Kw = 16.00 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,865 tons (100% coal)

Complement:
	537 - 699

Cost:
	£0.815 million / $3.259 million

Distribution of weights at normal displacement:
	Armament: 532 tons, 4.8 %
	   - Guns: 528 tons, 4.8 %
	   - Weapons: 4 tons, 0.0 %
	Armour: 3,621 tons, 32.8 %
	   - Belts: 1,434 tons, 13.0 %
	   - Torpedo bulkhead: 320 tons, 2.9 %
	   - Armament: 1,122 tons, 10.2 %
	   - Armour Deck: 584 tons, 5.3 %
	   - Conning Tower: 160 tons, 1.4 %
	Machinery: 1,696 tons, 15.4 %
	Hull, fittings & equipment: 3,439 tons, 31.2 %
	Fuel, ammunition & stores: 1,648 tons, 14.9 %
	Miscellaneous weights: 100 tons, 0.9 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  13,525 lbs / 6,135 Kg = 10.8 x 14.0 " / 356 mm shells or 15.2 torpedoes
	Stability (Unstable if below 1.00): 1.55
	Metacentric height 7.3 ft / 2.2 m
	Roll period: 12.2 seconds
	Steadiness	- As gun platform (Average = 50 %): 79 %
			- Recoil effect (Restricted arc if above 1.00): 0.30
	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): 0.570 / 0.578
	Length to Beam Ratio: 4.17 : 1
	'Natural speed' for length: 18.11 kts
	Power going to wave formation at top speed: 50 %
	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:	25.00 %,  18.04 ft / 5.50 m,  14.76 ft / 4.50 m
	   - Forward deck:	30.00 %,  14.76 ft / 4.50 m,  11.48 ft / 3.50 m
	   - Aft deck:	25.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
	   - Quarter deck:	20.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
	   - Average freeboard:		13.12 ft / 4.00 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 79.9 %
		- Above water (accommodation/working, high = better): 79.6 %
	Waterplane Area: 18,365 Square feet or 1,706 Square metres
	Displacement factor (Displacement / loading): 116 %
	Structure weight / hull surface area: 159 lbs/sq ft or 775 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.88
		- Longitudinal: 3.26
		- 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