Jjalb-Eun Byeog-Class Scout Cruiser [1915] (Seondok)

Jjalb-Eun Byeog-Class, Seondok County Scout Cruiser laid down 1915

Displacement:
	9,169 t light; 9,900 t standard; 10,284 t normal; 10,591 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(493.85 ft / 492.13 ft) x 68.90 ft x (22.97 / 23.46 ft)
	(150.52 m / 150.00 m) x 21.00 m  x (7.00 / 7.15 m)

Armament:
      8 - 5.71" / 145 mm 57.0 cal guns - 110.01lbs / 49.90kg shells, 225 per gun
	  Quick firing guns in turret on barbette mounts, 1915 Model
	  4 x Twin mounts on centreline ends, evenly spread
		2 raised mounts - superfiring
      30 - 5.71" / 145 mm 57.0 cal guns - 110.01lbs / 49.90kg shells, 225 per gun
	  Quick firing guns in casemate mounts, 1915 Model
	  22 x Single mounts on sides, evenly spread
		8 raised mounts
	  8 x Single mounts on centreline, evenly spread
		4 raised mounts
      8 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 1,000 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  8 x Single mounts on sides, evenly spread
		8 raised mounts
      8 - 0.39" / 10.0 mm 84.0 cal guns - 0.04lbs / 0.02kg shells, 1,000 per gun
	  Anti-air guns in deck mounts, 1916 Model
	  8 x Single mounts on sides, evenly spread
      Weight of broadside 4,185 lbs / 1,898 kg
      Main Torpedoes
      16 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.163 t each, 34.609 t total
	In 4 sets of deck mounted side rotating tubes
      2nd Torpedoes
      16 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.163 t each, 34.609 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	5.91" / 150 mm	344.49 ft / 105.00 m	9.97 ft / 3.04 m
	Ends:	1.97" / 50 mm	147.61 ft / 44.99 m	9.97 ft / 3.04 m
	Upper:	1.97" / 50 mm	344.49 ft / 105.00 m	8.01 ft / 2.44 m
	  Main Belt covers 108 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		0.98" / 25 mm	344.49 ft / 105.00 m	19.23 ft / 5.86 m
	Beam between torpedo bulkheads 55.77 ft / 17.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	5.71" / 145 mm	4.72" / 120 mm		5.71" / 145 mm
	2nd:	5.71" / 145 mm	2.95" / 75 mm		5.71" / 145 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 1.97" / 50 mm
	Forecastle: 1.57" / 40 mm  Quarter deck: 3.15" / 80 mm

   - Conning towers: Forward 5.91" / 150 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 2 shafts, 45,617 shp / 34,030 Kw = 26.67 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 691 tons

Complement:
	509 - 663

Cost:
	£1.225 million / $4.900 million

Distribution of weights at normal displacement:
	Armament: 1,006 tons, 9.8 %
	   - Guns: 893 tons, 8.7 %
	   - Weapons: 112 tons, 1.1 %
	Armour: 3,225 tons, 31.4 %
	   - Belts: 1,183 tons, 11.5 %
	   - Torpedo bulkhead: 241 tons, 2.3 %
	   - Armament: 926 tons, 9.0 %
	   - Armour Deck: 815 tons, 7.9 %
	   - Conning Tower: 60 tons, 0.6 %
	Machinery: 1,728 tons, 16.8 %
	Hull, fittings & equipment: 3,111 tons, 30.2 %
	Fuel, ammunition & stores: 1,115 tons, 10.8 %
	Miscellaneous weights: 100 tons, 1.0 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  13,905 lbs / 6,307 Kg = 149.5 x 5.7 " / 145 mm shells or 1.5 torpedoes
	Stability (Unstable if below 1.00): 1.24
	Metacentric height 4.3 ft / 1.3 m
	Roll period: 14.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 61 %
			- Recoil effect (Restricted arc if above 1.00): 0.45
	Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
	Hull has a flush deck,
	  a normal bow and a cruiser stern
	Block coefficient (normal/deep): 0.462 / 0.466
	Length to Beam Ratio: 7.14 : 1
	'Natural speed' for length: 22.18 kts
	Power going to wave formation at top speed: 55 %
	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 %,  24.61 ft / 7.50 m,  21.33 ft / 6.50 m
	   - Forward deck:	30.00 %,  21.33 ft / 6.50 m,  16.40 ft / 5.00 m
	   - Aft deck:	40.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
	   - Quarter deck:	10.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
	   - Average freeboard:		18.39 ft / 5.61 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 104.5 %
		- Above water (accommodation/working, high = better): 135.9 %
	Waterplane Area: 21,850 Square feet or 2,030 Square metres
	Displacement factor (Displacement / loading): 109 %
	Structure weight / hull surface area: 117 lbs/sq ft or 572 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.92
		- Longitudinal: 1.93
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily