Hungchung-Class Battlecruiser [1909] (Seondok)

Hungchung-Class, Seondok County Battlecruiser laid down 1909

Displacement:
	16,827 t light; 17,750 t standard; 18,709 t normal; 19,476 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(538.06 ft / 524.93 ft) x 91.86 ft x (26.25 / 27.07 ft)
	(164.00 m / 160.00 m) x 28.00 m  x (8.00 / 8.25 m)

Armament:
      8 - 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
	  4 x Twin mounts on centreline, evenly spread
      18 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 300 per gun
	  Quick firing guns in casemate mounts, 1904 Model
	  18 x Single mounts on sides, evenly spread
		18 hull mounts in casemates- Limited use in heavy seas
      8 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 2,500 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  8 x Single mounts on centreline, evenly spread
		8 raised mounts
      Weight of broadside 8,306 lbs / 3,767 kg
      Main Torpedoes
      4 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.139 t each, 8.556 t total
	In 2 sets of deck mounted side rotating tubes
      2nd Torpedoes
      12 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.139 t each, 25.669 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	7.09" / 180 mm	442.91 ft / 135.00 m	11.52 ft / 3.51 m
	Ends:	4.33" / 110 mm	  82.02 ft / 25.00 m	11.52 ft / 3.51 m
	Upper:	4.92" / 125 mm	442.91 ft / 135.00 m	8.01 ft / 2.44 m
	  Main Belt covers 130 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	442.91 ft / 135.00 m	23.49 ft / 7.16 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:	3.94" / 100 mm	1.97" / 50 mm		3.94" / 100 mm
	3rd:	0.98" / 25 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, 4 shafts, 61,655 shp / 45,994 Kw = 26.00 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,726 tons (100% coal)

Complement:
	799 - 1,039

Cost:
	£1.794 million / $7.175 million

Distribution of weights at normal displacement:
	Armament: 1,578 tons, 8.4 %
	   - Guns: 1,529 tons, 8.2 %
	   - Weapons: 49 tons, 0.3 %
	Armour: 5,987 tons, 32.0 %
	   - Belts: 2,360 tons, 12.6 %
	   - Torpedo bulkhead: 758 tons, 4.1 %
	   - Armament: 1,551 tons, 8.3 %
	   - Armour Deck: 1,199 tons, 6.4 %
	   - Conning Tower: 120 tons, 0.6 %
	Machinery: 3,083 tons, 16.5 %
	Hull, fittings & equipment: 6,079 tons, 32.5 %
	Fuel, ammunition & stores: 1,882 tons, 10.1 %
	Miscellaneous weights: 100 tons, 0.5 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  24,249 lbs / 10,999 Kg = 26.7 x 12.2 " / 310 mm shells or 2.4 torpedoes
	Stability (Unstable if below 1.00): 1.33
	Metacentric height 7.3 ft / 2.2 m
	Roll period: 14.3 seconds
	Steadiness	- As gun platform (Average = 50 %): 60 %
			- Recoil effect (Restricted arc if above 1.00): 0.41
	Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.517 / 0.522
	Length to Beam Ratio: 5.71 : 1
	'Natural speed' for length: 22.91 kts
	Power going to wave formation at top speed: 57 %
	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:	20.00 %,  27.89 ft / 8.50 m,  24.61 ft / 7.50 m
	   - Forward deck:	30.00 %,  24.61 ft / 7.50 m,  20.51 ft / 6.25 m
	   - Aft deck:	35.00 %,  20.51 ft / 6.25 m,  20.51 ft / 6.25 m
	   - Quarter deck:	15.00 %,  20.51 ft / 6.25 m,  20.51 ft / 6.25 m
	   - Average freeboard:		22.20 ft / 6.77 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 128.7 %
		- Above water (accommodation/working, high = better): 162.2 %
	Waterplane Area: 32,645 Square feet or 3,033 Square metres
	Displacement factor (Displacement / loading): 95 %
	Structure weight / hull surface area: 160 lbs/sq ft or 781 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.92
		- Longitudinal: 2.15
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Excellent accommodation and workspace room