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Saturday, January 15, 2005

This is a design that I had intended to produce in numbers: Ger/CL/1915

This was a German light cruiser (Ger/CL/1915) that I had intended in the wargame, to produce in numbers. The ship had 6-6in guns in twin mounts, with one forward and two aft, with one superfiring with blast shield. The ship had three funnels, with the forefunnel raised. There is one twin TT aft of the bridge and forward of the funnels, and another just aft of the funnels. There are two tall pole masts, with a director on the bridge. I had hoped for 5400 tons with 60,000 SHP, but that was insufficient for Springsharp.
Ger/CL/1915, Germany Light Cruiser laid down 1915

Displacement:
	7,168 t light; 7,413 t standard; 7,968 t normal; 8,412 t full load

Dimensions: Length overall / water x beam x draught
	476.91 ft / 475.00 ft x 48.00 ft x 22.00 ft (normal load)
	145.36 m / 144.78 m x 14.63 m  x 6.71 m

Armament:
      6 - 6.00" / 152 mm guns (3x2 guns), 108.00lbs / 48.99kg shells, 1915 Model
	  Quick firing guns in deck mounts with hoists
	  on centreline ends, majority aft, all raised mounts - superfiring
	Weight of broadside 648 lbs / 294 kg
	Shells per gun, main battery: 240
	4 - 23.6" / 599.44 mm above water torpedoes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	3.00" / 76 mm	345.00 ft / 105.16 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 112 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	2.00" / 51 mm	2.00" / 51 mm		2.00" / 51 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 3.00" / 76 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 4 shafts, 83,619 shp / 62,380 Kw = 32.00 kts
	Range 3,600nm at 15.00 kts
	Bunker at max displacement = 999 tons

Complement:
	421 - 548

Cost:
	£1.109 million / $4.435 million

Distribution of weights at normal displacement:
	Armament: 81 tons, 1.0 %
	Armour: 1,353 tons, 17.0 %
	   - Belts: 680 tons, 8.5 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 55 tons, 0.7 %
	   - Armour Deck: 592 tons, 7.4 %
	   - Conning Tower: 26 tons, 0.3 %
	Machinery: 3,167 tons, 39.7 %
	Hull, fittings & equipment: 2,566 tons, 32.2 %
	Fuel, ammunition & stores: 801 tons, 10.0 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  4,762 lbs / 2,160 Kg = 44.1 x 6.0 " / 152 mm shells or 0.8 torpedoes
	Stability (Unstable if below 1.00): 1.20
	Metacentric height 2.3 ft / 0.7 m
	Roll period: 13.2 seconds
	Steadiness	- As gun platform (Average = 50 %): 57 %
			- Recoil effect (Restricted arc if above 1.00): 0.38
	Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.556
	Length to Beam Ratio: 9.90 : 1
	'Natural speed' for length: 21.79 kts
	Power going to wave formation at top speed: 64 %
	Trim (Max stability = 0, Max steadiness = 100): 54
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 1.00 ft / 0.30 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		26.00 ft / 7.92 m
	   - Forecastle (20 %):	25.00 ft / 7.62 m
	   - Mid (30 %):		25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
	   - Quarterdeck (15 %):	17.00 ft / 5.18 m
	   - Stern:		17.00 ft / 5.18 m
	   - Average freeboard:	19.48 ft / 5.94 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 137.1 %
		- Above water (accommodation/working, high = better): 111.8 %
	Waterplane Area: 16,002 Square feet or 1,487 Square metres
	Displacement factor (Displacement / loading): 96 %
	Structure weight / hull surface area: 83 lbs/sq ft or 407 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.91
		- Longitudinal: 2.36
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is adequate

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