Tangyan-Class Torpedo Scout Cruiser [1905] (Seondok)

Tangyan-Class, Seondok County Torpedo Scout Cruiser laid down 1905

Displacement:
	2,816 t light; 2,900 t standard; 3,317 t normal; 3,651 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(396.98 ft / 393.70 ft) x 45.93 ft x (16.40 / 17.46 ft)
	(121.00 m / 120.00 m) x 14.00 m  x (5.00 / 5.32 m)

Armament:
      4 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 150 per gun
	  Quick firing guns in deck mounts, 1904 Model
	  2 x Twin mounts on centreline, evenly spread
      8 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 1,800 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  8 x Single mounts on sides, evenly spread
		8 raised mounts
      Weight of broadside 168 lbs / 76 kg
      Main Torpedoes
      12 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 1.970 t each, 23.643 t total
	In 4 sets of deck mounted centre rotating tubes
      2nd Torpedoes
      12 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 1.970 t each, 23.643 t total
	below water reloads

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

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	377.30 ft / 115.00 m	11.48 ft / 3.50 m
	Beam between torpedo bulkheads 45.93 ft / 14.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	0.98" / 25 mm	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 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, steam turbines,
	Direct drive, 2 shafts, 16,623 shp / 12,401 Kw = 24.47 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 751 tons (100% coal)

Complement:
	218 - 284

Cost:
	£0.299 million / $1.194 million

Distribution of weights at normal displacement:
	Armament: 102 tons, 3.1 %
	   - Guns: 25 tons, 0.8 %
	   - Weapons: 77 tons, 2.3 %
	Armour: 585 tons, 17.6 %
	   - Torpedo bulkhead: 316 tons, 9.5 %
	   - Armament: 7 tons, 0.2 %
	   - Armour Deck: 244 tons, 7.4 %
	   - Conning Tower: 19 tons, 0.6 %
	Machinery: 1,369 tons, 41.3 %
	Hull, fittings & equipment: 759 tons, 22.9 %
	Fuel, ammunition & stores: 501 tons, 15.1 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  2,370 lbs / 1,075 Kg = 58.4 x 4.3 " / 110 mm shells or 0.4 torpedoes
	Stability (Unstable if below 1.00): 1.73
	Metacentric height 3.8 ft / 1.2 m
	Roll period: 9.8 seconds
	Steadiness	- As gun platform (Average = 50 %): 78 %
			- Recoil effect (Restricted arc if above 1.00): 0.03
	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): 0.391 / 0.405
	Length to Beam Ratio: 8.57 : 1
	'Natural speed' for length: 19.84 kts
	Power going to wave formation at top speed: 50 %
	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 %,  18.86 ft / 5.75 m,  16.40 ft / 5.00 m
	   - Forward deck:	30.00 %,  16.40 ft / 5.00 m,  11.48 ft / 3.50 m
	   - Aft deck:	50.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
	   - Quarter deck:	10.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
	   - Average freeboard:		12.81 ft / 3.91 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 141.7 %
		- Above water (accommodation/working, high = better): 53.4 %
	Waterplane Area: 11,066 Square feet or 1,028 Square metres
	Displacement factor (Displacement / loading): 97 %
	Structure weight / hull surface area: 62 lbs/sq ft or 304 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.95
		- Longitudinal: 1.54
		- 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

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Made using Carb's Light Cruiser calculator; actual speed is 26 knots.