Hwanghon Bidulgi-Class Armored Cruiser [1890] (Seondok)

Hwanghon Bidulgi-Class, Seondok County Armored Cruiser laid down 1890

Displacement:
	8,652 t light; 9,000 t standard; 9,817 t normal; 10,470 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(403.00 ft / 400.00 ft) x 60.00 ft x (26.00 / 27.36 ft)
	(122.83 m / 121.92 m) x 18.29 m  x (7.92 / 8.34 m)

Armament:
      4 - 8.00" / 203 mm 40.0 cal guns - 253.53lbs / 115.00kg shells, 80 per gun
	  Breech loading guns in turret on barbette mounts, 1890 Model
	  2 x Twin mounts on centreline, evenly spread
      10 - 5.33" / 135 mm 40.0 cal guns - 72.56lbs / 32.91kg shells, 150 per gun
	  Quick firing guns in casemate mounts, 1891 Model
	  10 x Single mounts on sides, evenly spread
      16 - 3.00" / 76.2 mm 40.0 cal guns - 12.74lbs / 5.78kg shells, 200 per gun
	  Quick firing guns in casemate mounts, 1888 Model
	  16 x Single mounts on sides, evenly spread
		16 hull mounts in casemates- Limited use in all but light seas
      20 - 1.50" / 38.1 mm 40.0 cal guns - 1.59lbs / 0.72kg shells, 300 per gun
	  Quick firing guns in deck mounts, 1888 Model
	  4 x Quintuple mounts on sides, evenly spread
		4 raised mounts
      12 - 2.50" / 63.5 mm 30.0 cal guns - 6.98lbs / 3.17kg shells, 400 per gun
	  Quick firing guns in deck mounts, 1886 Model
	  12 x Single mounts on sides, evenly spread
		12 raised mounts
      Weight of broadside 2,059 lbs / 934 kg
      Main Torpedoes
      4 - 18.5" / 470 mm, 6.00 ft / 1.83 m torpedoes - 0.164 t each, 0.656 t total
	In 4 sets of deck mounted carriage/fixed tubes
      2nd Torpedoes
      4 - 18.5" / 470 mm, 6.00 ft / 1.83 m torpedoes - 0.164 t each, 0.656 t total
	In 1 sets of deck mounted carriage/fixed tubes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	8.00" / 203 mm	310.00 ft / 94.49 m	9.30 ft / 2.83 m
	Ends:	2.00" / 51 mm	  89.98 ft / 27.43 m	9.30 ft / 2.83 m
	Upper:	4.00" / 102 mm	310.00 ft / 94.49 m	8.00 ft / 2.44 m
	  Main Belt covers 119 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.00" / 25 mm	310.00 ft / 94.49 m	23.87 ft / 7.28 m
	Beam between torpedo bulkheads 56.00 ft / 17.07 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	8.00" / 203 mm	6.00" / 152 mm		8.00" / 203 mm
	2nd:	4.00" / 102 mm	1.00" / 25 mm		4.00" / 102 mm
	3rd:	1.00" / 25 mm	      -			1.00" / 25 mm
	4th:	1.00" / 25 mm	      -			      -
	5th:	1.00" / 25 mm	      -			      -

   - Armoured deck - multiple decks:
	For and Aft decks: 2.25" / 57 mm
	Forecastle: 1.50" / 38 mm  Quarter deck: 1.50" / 38 mm

   - Conning towers: Forward 12.00" / 305 mm, Aft 4.00" / 102 mm

Machinery:
	Coal fired boilers, complex reciprocating steam engines,
	Direct drive, 2 shafts, 15,980 ihp / 11,921 Kw = 20.00 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,470 tons (100% coal)

Complement:
	493 - 641

Cost:
	£0.843 million / $3.373 million

Distribution of weights at normal displacement:
	Armament: 360 tons, 3.7 %
	   - Guns: 358 tons, 3.6 %
	   - Weapons: 2 tons, 0.0 %
	Armour: 3,000 tons, 30.6 %
	   - Belts: 1,433 tons, 14.6 %
	   - Torpedo bulkhead: 274 tons, 2.8 %
	   - Armament: 457 tons, 4.7 %
	   - Armour Deck: 679 tons, 6.9 %
	   - Conning Towers: 158 tons, 1.6 %
	Machinery: 2,959 tons, 30.1 %
	Hull, fittings & equipment: 2,333 tons, 23.8 %
	Fuel, ammunition & stores: 1,165 tons, 11.9 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  7,966 lbs / 3,613 Kg = 31.1 x 8.0 " / 203 mm shells or 11.3 torpedoes
	Stability (Unstable if below 1.00): 1.35
	Metacentric height 4.0 ft / 1.2 m
	Roll period: 12.7 seconds
	Steadiness	- As gun platform (Average = 50 %): 75 %
			- Recoil effect (Restricted arc if above 1.00): 0.29
	Seaboat quality  (Average = 1.00): 1.49

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.551 / 0.558
	Length to Beam Ratio: 6.67 : 1
	'Natural speed' for length: 20.00 kts
	Power going to wave formation at top speed: 50 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -3.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	10.00 %,  18.00 ft / 5.49 m,  16.00 ft / 4.88 m
	   - Forward deck:	30.00 %,  16.00 ft / 4.88 m,  14.00 ft / 4.27 m
	   - Aft deck:	47.50 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
	   - Quarter deck:	12.50 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
	   - Average freeboard:		14.58 ft / 4.44 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 118.3 %
		- Above water (accommodation/working, high = better): 92.7 %
	Waterplane Area: 16,759 Square feet or 1,557 Square metres
	Displacement factor (Displacement / loading): 97 %
	Structure weight / hull surface area: 106 lbs/sq ft or 519 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.93
		- Longitudinal: 2.04
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Adequate accommodation and workspace room
	Ship has slow, easy roll, a good, steady gun platform
	Good seaboat, rides out heavy weather easily