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Monday, February 07, 2005

The German scout Ger/CS/1909

This was my scout design for 1909 for the Germans. It was inspired by the large Italian destroyers. The armament is 4-5in QF and 2-21in TT. The speed is very high, being 36 knots. That made achieving a balanced design all the more difficult, although it could be done (SHP/ton of machinery weight being 48.76):
Ger/CS/1909, Germany Scout laid down 1909 (Engine 1933)

Displacement:
	2,010 t light; 2,079 t standard; 2,173 t normal; 2,248 t full load

Dimensions: Length overall / water x beam x draught
	350.84 ft / 350.00 ft x 37.00 ft x 16.00 ft (normal load)
	106.94 m / 106.68 m x 11.28 m  x 4.88 m

Armament:
      4 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1909 Model
	  Quick firing guns in deck mounts with hoists
	  on centreline ends, evenly spread, all raised mounts - superfiring
	Weight of broadside 250 lbs / 113 kg
	Shells per gun, main battery: 180
	2 - 21.0" / 533.4 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 65,096 shp / 48,561 Kw = 36.00 kts
	Range 4,200nm at 10.00 kts
	Bunker at max displacement = 169 tons

Complement:
	158 - 206

Cost:
	£0.283 million / $1.134 million

Distribution of weights at normal displacement:
	Armament: 31 tons, 1.4 %
	Machinery: 1,335 tons, 61.4 %
	Hull, fittings & equipment: 644 tons, 29.6 %
	Fuel, ammunition & stores: 162 tons, 7.5 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  404 lbs / 183 Kg = 6.5 x 5.0 " / 127 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.39
	Metacentric height 2.0 ft / 0.6 m
	Roll period: 11.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 56 %
			- Recoil effect (Restricted arc if above 1.00): 0.35
	Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.367
	Length to Beam Ratio: 9.46 : 1
	'Natural speed' for length: 18.71 kts
	Power going to wave formation at top speed: 70 %
	Trim (Max stability = 0, Max steadiness = 100): 54
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		24.00 ft / 7.32 m
	   - Forecastle (28 %):	22.00 ft / 6.71 m
	   - Mid (28 %):		22.00 ft / 6.71 m (15.00 ft / 4.57 m aft of break)
	   - Quarterdeck (15 %):	15.00 ft / 4.57 m
	   - Stern:		15.00 ft / 4.57 m
	   - Average freeboard:	17.18 ft / 5.24 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 209.2 %
		- Above water (accommodation/working, high = better): 127.1 %
	Waterplane Area: 7,867 Square feet or 731 Square metres
	Displacement factor (Displacement / loading): 54 %
	Structure weight / hull surface area: 37 lbs/sq ft or 181 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.45
		- Longitudinal: 2.99
		- Overall: 0.54
	Hull space for machinery, storage, compartmentation is extremely poor
	Room for accommodation and workspaces is excellent

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