Dai-Seo-Class Armored Corvette [1868] (Seondok)

Dai-Seo-Class, Seondok County Armored Corvette laid down 1868
Armoured Corvette (Broadside ironclad)

Displacement:
	1,915 t light; 2,025 t standard; 2,196 t normal; 2,332 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(285.43 ft / 278.87 ft) x 32.81 ft x (13.12 / 13.81 ft)
	(87.00 m / 85.00 m) x 10.00 m  x (4.00 / 4.21 m)

Armament:
      16 - 5.91" / 150 mm 18.0 cal guns - 73.85lbs / 33.50kg shells, 100 per gun
	  Muzzle loading guns in broadside mounts, 1864 Model
	  16 x Single mounts on sides, evenly spread
      Weight of broadside 1,182 lbs / 536 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	5.91" / 150 mm	181.27 ft / 55.25 m	6.89 ft / 2.10 m
	Ends:	3.94" / 100 mm	  97.57 ft / 29.74 m	6.89 ft / 2.10 m
	  Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		0.79" / 20 mm	181.27 ft / 55.25 m	12.57 ft / 3.83 m
	Beam between torpedo bulkheads 32.81 ft / 10.00 m

Machinery:
	Coal fired boilers, simple reciprocating steam engines,
	Direct drive, 2 shafts, 2,254 ihp / 1,682 Kw = 14.00 kts
	Range 500nm at 14.00 kts
	Bunker at max displacement = 307 tons (100% coal)

Complement:
	159 - 208

Cost:
	£0.170 million / $0.678 million

Distribution of weights at normal displacement:
	Armament: 60 tons, 2.7 %
	   - Guns: 60 tons, 2.7 %
	Armour: 475 tons, 21.6 %
	   - Belts: 409 tons, 18.6 %
	   - Torpedo bulkhead: 66 tons, 3.0 %
	Machinery: 577 tons, 26.3 %
	Hull, fittings & equipment: 803 tons, 36.6 %
	Fuel, ammunition & stores: 280 tons, 12.8 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  1,702 lbs / 772 Kg = 24.7 x 5.9 " / 150 mm shells or 0.7 torpedoes
	Stability (Unstable if below 1.00): 1.38
	Metacentric height 1.6 ft / 0.5 m
	Roll period: 10.7 seconds
	Steadiness	- As gun platform (Average = 50 %): 78 %
			- Recoil effect (Restricted arc if above 1.00): 0.74
	Seaboat quality  (Average = 1.00): 1.55

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.640 / 0.646
	Length to Beam Ratio: 8.50 : 1
	'Natural speed' for length: 16.70 kts
	Power going to wave formation at top speed: 38 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -10.00 degrees
	Stern overhang: -6.56 ft / -2.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  13.12 ft / 4.00 m,  11.48 ft / 3.50 m
	   - Forward deck:	30.00 %,  11.48 ft / 3.50 m,  9.84 ft / 3.00 m
	   - Aft deck:	35.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
	   - Quarter deck:	15.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
	   - Average freeboard:		10.55 ft / 3.22 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 97.3 %
		- Above water (accommodation/working, high = better): 85.0 %
	Waterplane Area: 6,945 Square feet or 645 Square metres
	Displacement factor (Displacement / loading): 120 %
	Structure weight / hull surface area: 81 lbs/sq ft or 397 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.95
		- Longitudinal: 1.51
		- Overall: 1.00
	Adequate 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