Baekdu-Class Light Cruiser [1930] (Seondok)

Baekdu-Class, Seondok County Light Cruiser laid down 1930

Displacement:
	8,996 t light; 9,450 t standard; 10,077 t normal; 10,578 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(610.87 ft / 606.96 ft) x 65.62 ft x (18.04 / 18.69 ft)
	(186.19 m / 185.00 m) x 20.00 m  x (5.50 / 5.70 m)

Armament:
      12 - 6.10" / 155 mm 60.0 cal guns - 124.45lbs / 56.45kg shells, 175 per gun
	  Quick firing guns in turret on barbette mounts, 1930 Model
	  4 x Triple mounts on centreline, evenly spread
		2 raised mounts
      4 - 1.89" / 48.0 mm 32.0 cal guns - 3.13lbs / 1.42kg shells, 1,500 per gun
	  Anti-air guns in deck mounts, 1930 Model
	  4 x Single mounts on sides, evenly spread
		4 raised mounts
      24 - 1.06" / 27.0 mm 50.0 cal guns - 0.64lbs / 0.29kg shells, 3,000 per gun
	  Anti-air guns in deck mounts, 1930 Model
	  4 x 2 row quad mounts on sides, evenly spread
		4 raised mounts
	  2 x 2 row quad mounts on centreline, evenly spread
		2 double raised mounts
      10 - 4.33" / 110 mm 50.0 cal guns - 42.99lbs / 19.50kg shells, 300 per gun
	  Quick firing guns in deck mounts, 1920 Model
	  10 x Single mounts on sides, evenly spread
      Weight of broadside 1,951 lbs / 885 kg
      Main Torpedoes
      16 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.223 t each, 35.569 t total
	In 4 sets of deck mounted side rotating tubes
      2nd Torpedoes
      32 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.223 t each, 71.138 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	4.92" / 125 mm	331.36 ft / 101.00 m	9.71 ft / 2.96 m
	Ends:	Unarmoured
	  Main Belt covers 84 % of normal length
	  Main Belt inclined -10.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		1.97" / 50 mm	331.36 ft / 101.00 m	16.50 ft / 5.03 m
	Beam between torpedo bulkheads 52.49 ft / 16.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	6.30" / 160 mm	2.95" / 75 mm		3.94" / 100 mm
	2nd:	0.49" / 13 mm	      -			      -
	3rd:	0.49" / 13 mm	      -			      -
	4th:	2.95" / 75 mm	1.97" / 50 mm		      -

   - Armoured deck - multiple decks:
	For and Aft decks: 2.95" / 75 mm
	Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 44,397 shp / 33,121 Kw = 28.05 kts
	Range 5,000nm at 14.00 kts
	Bunker at max displacement = 1,128 tons

Complement:
	502 - 653

Cost:
	£2.995 million / $11.980 million

Distribution of weights at normal displacement:
	Armament: 706 tons, 7.0 %
	   - Guns: 546 tons, 5.4 %
	   - Weapons: 160 tons, 1.6 %
	Armour: 2,946 tons, 29.2 %
	   - Belts: 677 tons, 6.7 %
	   - Torpedo bulkhead: 398 tons, 4.0 %
	   - Armament: 511 tons, 5.1 %
	   - Armour Deck: 1,320 tons, 13.1 %
	   - Conning Tower: 40 tons, 0.4 %
	Machinery: 1,345 tons, 13.4 %
	Hull, fittings & equipment: 3,999 tons, 39.7 %
	Fuel, ammunition & stores: 1,081 tons, 10.7 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  20,246 lbs / 9,183 Kg = 178.2 x 6.1 " / 155 mm shells or 2.1 torpedoes
	Stability (Unstable if below 1.00): 1.16
	Metacentric height 3.5 ft / 1.1 m
	Roll period: 14.7 seconds
	Steadiness	- As gun platform (Average = 50 %): 72 %
			- Recoil effect (Restricted arc if above 1.00): 0.41
	Seaboat quality  (Average = 1.00): 1.44

Hull form characteristics:
	Hull has a flush deck,
	  a straight bulbous bow and large transom stern
	Block coefficient (normal/deep): 0.491 / 0.498
	Length to Beam Ratio: 9.25 : 1
	'Natural speed' for length: 28.32 kts
	Power going to wave formation at top speed: 48 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 8.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  27.89 ft / 8.50 m,  22.97 ft / 7.00 m
	   - Forward deck:	30.00 %,  22.97 ft / 7.00 m,  18.04 ft / 5.50 m
	   - Aft deck:	35.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Quarter deck:	15.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Average freeboard:		20.16 ft / 6.15 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 83.4 %
		- Above water (accommodation/working, high = better): 191.5 %
	Waterplane Area: 27,360 Square feet or 2,542 Square metres
	Displacement factor (Displacement / loading): 131 %
	Structure weight / hull surface area: 107 lbs/sq ft or 521 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.98
		- Longitudinal: 1.27
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Ship has slow, easy roll, a good, steady gun platform
	Good seaboat, rides out heavy weather easily

=====================================
Made using Carb's Light Cruiser Calculator, actual speed is 33 knots.