Taeyu-Class Battleship [1909] (Seondok)

Taeyu-Class, Seondok County Battleship laid down 1909

Displacement:
	15,942 t light; 16,825 t standard; 18,183 t normal; 19,269 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(495.41 ft / 492.13 ft) x 85.30 ft x (26.25 / 27.51 ft)
	(151.00 m / 150.00 m) x 26.00 m  x (8.00 / 8.39 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
	  2 x Twin mounts on centreline, evenly spread
	  2 x Twin mounts on sides amidships
      14 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 300 per gun
	  Quick firing guns in casemate mounts, 1904 Model
	  14 x Single mounts on sides, evenly spread
		14 hull mounts in casemates- Limited use in heavy seas
      14 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 800 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  14 x Single mounts on sides, evenly spread
		14 raised mounts
      Weight of broadside 8,145 lbs / 3,694 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
      8 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.139 t each, 17.113 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	12.2" / 310 mm	328.08 ft / 100.00 m	11.09 ft / 3.38 m
	Ends:	3.94" / 100 mm	164.04 ft / 50.00 m	11.09 ft / 3.38 m
	Upper:	5.91" / 150 mm	328.08 ft / 100.00 m	8.01 ft / 2.44 m
	  Main Belt covers 103 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	328.08 ft / 100.00 m	25.26 ft / 7.70 m
	Beam between torpedo bulkheads 59.06 ft / 18.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	11.8" / 300 mm	7.87" / 200 mm		10.8" / 275 mm
	2nd:	3.94" / 100 mm	1.97" / 50 mm		3.94" / 100 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 3.94" / 100 mm
	Forecastle: 2.95" / 75 mm  Quarter deck: 2.95" / 75 mm

   - Conning towers: Forward 11.81" / 300 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, steam turbines,
	Direct drive, 2 shafts, 35,624 shp / 26,575 Kw = 22.50 kts
	Range 7,500nm at 10.00 kts
	Bunker at max displacement = 2,444 tons (100% coal)

Complement:
	782 - 1,017

Cost:
	£1.573 million / $6.292 million

Distribution of weights at normal displacement:
	Armament: 1,540 tons, 8.5 %
	   - Guns: 1,501 tons, 8.3 %
	   - Weapons: 39 tons, 0.2 %
	Armour: 7,389 tons, 40.6 %
	   - Belts: 2,904 tons, 16.0 %
	   - Torpedo bulkhead: 604 tons, 3.3 %
	   - Armament: 1,601 tons, 8.8 %
	   - Armour Deck: 2,105 tons, 11.6 %
	   - Conning Tower: 176 tons, 1.0 %
	Machinery: 1,781 tons, 9.8 %
	Hull, fittings & equipment: 5,132 tons, 28.2 %
	Fuel, ammunition & stores: 2,241 tons, 12.3 %
	Miscellaneous weights: 100 tons, 0.5 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  26,398 lbs / 11,974 Kg = 29.0 x 12.2 " / 310 mm shells or 2.9 torpedoes
	Stability (Unstable if below 1.00): 1.27
	Metacentric height 6.0 ft / 1.8 m
	Roll period: 14.6 seconds
	Steadiness	- As gun platform (Average = 50 %): 65 %
			- Recoil effect (Restricted arc if above 1.00): 0.46
	Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.578 / 0.584
	Length to Beam Ratio: 5.77 : 1
	'Natural speed' for length: 22.18 kts
	Power going to wave formation at top speed: 53 %
	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 %,  27.07 ft / 8.25 m,  21.88 ft / 6.67 m
	   - Forward deck:	30.00 %,  21.88 ft / 6.67 m,  16.40 ft / 5.00 m
	   - Aft deck:	35.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
	   - Quarter deck:	15.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
	   - Average freeboard:		18.74 ft / 5.71 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 102.4 %
		- Above water (accommodation/working, high = better): 125.4 %
	Waterplane Area: 30,065 Square feet or 2,793 Square metres
	Displacement factor (Displacement / loading): 99 %
	Structure weight / hull surface area: 150 lbs/sq ft or 730 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.93
		- Longitudinal: 1.88
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily