CRNS Celerai 1939 Destroyer

CRNS Celerai, Calder Destroyer laid down 1939

Displacement:
	1,806 t light; 1,941 t standard; 2,241 t normal; 2,481 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(402.90 ft / 393.70 ft) x 37.07 ft x (11.48 / 12.35 ft)
	(122.81 m / 120.00 m) x 11.30 m  x (3.50 / 3.76 m)

Armament:
      8 - 5.12" / 130 mm 38.0 cal guns - 63.63lbs / 28.86kg shells, 300 per gun
	  Dual purpose guns in deck and hoist mounts, 1939 Model
	  2 x Twin mounts on centreline, forward deck forward
		1 raised mount - superfiring
	  2 x Twin mounts on centreline, aft deck aft
		1 raised mount aft - superfiring
      4 - 1.18" / 30.0 mm 65.0 cal guns - 0.91lbs / 0.41kg shells, 2,000 per gun
	  Anti-air guns in deck mounts, 1939 Model
	  2 x Twin mounts on sides amidships
		2 double raised mounts
      6 - 0.52" / 13.2 mm 90.0 cal guns - 0.08lbs / 0.04kg shells, 4,000 per gun
	  Machine guns in deck mounts, 1939 Model
	  4 x Single mounts on sides, aft evenly spread
		4 raised mounts
	  2 x Single mounts on sides, forward deck centre
		2 double raised mounts
      Weight of broadside 513 lbs / 233 kg
      Main Torpedoes
      8 - 21.0" / 533 mm, 21.59 ft / 6.58 m torpedoes - 1.459 t each, 11.671 t total
	In 2 sets of deck mounted centre rotating tubes
      Main DC/AS Mortars
      2 - 749.57 lbs / 340.00 kg Depth Charges + 16 reloads - 6.023 t total
	in Stern depth charge racks

Armour:
   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	0.12" / 3 mm	0.12" / 3 mm		0.12" / 3 mm
	2nd:	0.51" / 13 mm	      -			      -

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 2 shafts, 25,425 shp / 18,967 Kw = 29.40 kts
	Range 7,000nm at 14.00 kts
	Bunker at max displacement = 540 tons

Complement:
	162 - 211

Cost:
	£1.170 million / $4.680 million

Distribution of weights at normal displacement:
	Armament: 131 tons, 5.9 %
	   - Guns: 101 tons, 4.5 %
	   - Weapons: 31 tons, 1.4 %
	Armour: 4 tons, 0.2 %
	   - Armament: 4 tons, 0.2 %
	Machinery: 688 tons, 30.7 %
	Hull, fittings & equipment: 983 tons, 43.9 %
	Fuel, ammunition & stores: 435 tons, 19.4 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  2,151 lbs / 976 Kg = 32.1 x 5.1 " / 130 mm shells or 0.6 torpedoes
	Stability (Unstable if below 1.00): 1.25
	Metacentric height 1.7 ft / 0.5 m
	Roll period: 11.9 seconds
	Steadiness	- As gun platform (Average = 50 %): 42 %
			- Recoil effect (Restricted arc if above 1.00): 0.56
	Seaboat quality  (Average = 1.00): 0.71

Hull form characteristics:
	Hull has a flush deck,
	  a normal bow and small transom stern
	Block coefficient (normal/deep): 0.468 / 0.482
	Length to Beam Ratio: 10.62 : 1
	'Natural speed' for length: 21.28 kts
	Power going to wave formation at top speed: 59 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 19.70 degrees
	Stern overhang: 2.62 ft / 0.80 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	17.50 %,  18.37 ft / 5.60 m,  14.44 ft / 4.40 m
	   - Forward deck:	40.00 %,  14.44 ft / 4.40 m,  10.50 ft / 3.20 m
	   - Aft deck:	25.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
	   - Quarter deck:	17.50 %,  10.50 ft / 3.20 m,  11.48 ft / 3.50 m
	   - Average freeboard:		12.34 ft / 3.76 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 119.4 %
		- Above water (accommodation/working, high = better): 109.5 %
	Waterplane Area: 9,674 Square feet or 899 Square metres
	Displacement factor (Displacement / loading): 126 %
	Structure weight / hull surface area: 68 lbs/sq ft or 334 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.35
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Adequate accommodation and workspace room
	Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

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Speed Calc:
Forward Speed Calc: Input 35 knots Output: 29.4 knots


True Machinery 35 knots

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