Mideu Swibmaen Liu-Class Gunboat [1908] (Seondok)

Mideu Swibmaen Liu-Class, Seondok County Gunboat laid down 1908

Displacement:
	947 t light; 1,000 t standard; 1,066 t normal; 1,119 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(264.11 ft / 262.47 ft) x 36.09 ft x (9.84 / 10.16 ft)
	(80.50 m / 80.00 m) x 11.00 m  x (3.00 / 3.10 m)

Armament:
      2 - 5.71" / 145 mm 45.0 cal guns - 95.00lbs / 43.09kg shells, 100 per gun
	  Breech loading guns in deck mounts, 1898 Model
	  2 x Single mounts on centreline, evenly spread
      8 - 3.44" / 87.5 mm 40.0 cal guns - 19.59lbs / 8.89kg shells, 150 per gun
	  Quick firing guns in deck mounts, 1894 Model
	  8 x Single mounts on sides, evenly spread
      2 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 500 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  2 x Single mounts on centreline, evenly spread
		2 raised mounts
      480 - 0.79" / 20.0 mm 80.0 cal guns - 0.28lbs / 0.13kg shells, 100 per gun
	  Muzzle loading guns in deck mounts, 1898 Model
	  48 x 2 row decuple mounts on sides, evenly spread
		24 raised mounts
      Weight of broadside 481 lbs / 218 kg
      Main Torpedoes
      4 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.135 t each, 8.540 t total
	In 4 sets of deck mounted side rotating tubes
      2nd Torpedoes
      8 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.135 t each, 17.081 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Ends:	Unarmoured

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		0.98" / 25 mm	209.97 ft / 64.00 m	7.09 ft / 2.16 m
	Beam between torpedo bulkheads 36.09 ft / 11.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	1.97" / 50 mm	0.98" / 25 mm		      -
	2nd:	0.49" / 13 mm	      -			      -

   - Protected deck - single deck:
	For and Aft decks: 1.18" / 30 mm
	Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 4.72" / 120 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, complex reciprocating steam engines,
	Direct drive, 2 shafts, 2,928 ihp / 2,184 Kw = 18.00 kts
	Range 2,000nm at 10.00 kts
	Bunker at max displacement = 119 tons (100% coal)

Complement:
	93 - 121

Cost:
	£0.114 million / $0.454 million

Distribution of weights at normal displacement:
	Armament: 165 tons, 15.4 %
	   - Guns: 126 tons, 11.8 %
	   - Weapons: 38 tons, 3.6 %
	Armour: 219 tons, 20.5 %
	   - Torpedo bulkhead: 54 tons, 5.1 %
	   - Armament: 25 tons, 2.4 %
	   - Armour Deck: 129 tons, 12.1 %
	   - Conning Tower: 11 tons, 1.0 %
	Machinery: 244 tons, 22.9 %
	Hull, fittings & equipment: 320 tons, 30.0 %
	Fuel, ammunition & stores: 119 tons, 11.1 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  1,039 lbs / 471 Kg = 11.2 x 5.7 " / 145 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.57
	Metacentric height 2.3 ft / 0.7 m
	Roll period: 10.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 78 %
			- Recoil effect (Restricted arc if above 1.00): 0.26
	Seaboat quality  (Average = 1.00): 1.56

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.400 / 0.407
	Length to Beam Ratio: 7.27 : 1
	'Natural speed' for length: 16.20 kts
	Power going to wave formation at top speed: 46 %
	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:	10.00 %,  11.48 ft / 3.50 m,  10.66 ft / 3.25 m
	   - Forward deck:	30.00 %,  10.66 ft / 3.25 m,  8.20 ft / 2.50 m
	   - Aft deck:	50.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
	   - Quarter deck:	10.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
	   - Average freeboard:		8.85 ft / 2.70 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 122.9 %
		- Above water (accommodation/working, high = better): 87.9 %
	Waterplane Area: 5,831 Square feet or 542 Square metres
	Displacement factor (Displacement / loading): 90 %
	Structure weight / hull surface area: 53 lbs/sq ft or 261 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.94
		- Longitudinal: 1.74
		- Overall: 1.00
	Cramped 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