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Saturday, January 15, 2005

I was determined to drive the faster Fleet Cruiser at 37 knots

I realized that the term that I used for these two German light cruisers was "Fleet Cruisers", in that they were intended to scout for the battlefleet and work with destroyers. The faster of the two was longer and had only 6-6in guns and 8-23.6in TT. Like the other ship, there was only light armor patches. I was able to get 37 knots by inflating displacement horribly, and increasing the hull depth to get adequate strength. It is not economical, but I was not trying to be.
Ger/CL/1923 Fleet Cruisert A1, Enter country Enter ship type laid down 1923

Displacement:
	10,044 t light; 10,326 t standard; 10,844 t normal; 11,259 t full load

Dimensions: Length overall / water x beam x draught
	576.12 ft / 575.00 ft x 52.00 ft x 22.00 ft (normal load)
	175.60 m / 175.26 m x 15.85 m  x 6.71 m

Armament:
      6 - 6.00" / 152 mm guns (3 mounts), 108.00lbs / 48.99kg shells, 1923 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, majority aft, 3 raised guns - superfiring
	Weight of broadside 648 lbs / 294 kg
	Shells per gun, main battery: 180
	8 - 23.6" / 599.44 mm above water torpedoes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	1.00" / 25 mm	420.00 ft / 128.02 m	9.00 ft / 2.74 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:	1.00" / 25 mm	1.00" / 25 mm		1.00" / 25 mm

   - Armour deck: 1.15" / 29 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 4 shafts, 144,985 shp / 108,159 Kw = 37.00 kts
	Range 3,500nm at 15.00 kts
	Bunker at max displacement = 933 tons

Complement:
	530 - 690

Cost:
	£3.194 million / $12.777 million

Distribution of weights at normal displacement:
	Armament: 81 tons, 0.7 %
	Armour: 700 tons, 6.5 %
	   - Belts: 154 tons, 1.4 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 71 tons, 0.7 %
	   - Armour Deck: 474 tons, 4.4 %
	   - Conning Tower: 0 tons, 0.0 %
	Machinery: 4,846 tons, 44.7 %
	Hull, fittings & equipment: 4,418 tons, 40.7 %
	Fuel, ammunition & stores: 800 tons, 7.4 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  6,783 lbs / 3,077 Kg = 62.8 x 6.0 " / 152 mm shells or 0.8 torpedoes
	Stability (Unstable if below 1.00): 1.14
	Metacentric height 2.4 ft / 0.7 m
	Roll period: 14.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 75 %
			- Recoil effect (Restricted arc if above 1.00): 0.45
	Seaboat quality  (Average = 1.00): 1.50

Hull form characteristics:
	Hull has rise forward of midbreak
	  and transom stern
	Block coefficient: 0.577
	Length to Beam Ratio: 11.06 : 1
	'Natural speed' for length: 26.95 kts
	Power going to wave formation at top speed: 66 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	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:		32.00 ft / 9.75 m
	   - Forecastle (20 %):	30.00 ft / 9.14 m
	   - Mid (70 %):		30.00 ft / 9.14 m (22.00 ft / 6.71 m aft of break)
	   - Quarterdeck (15 %):	22.00 ft / 6.71 m
	   - Stern:		22.00 ft / 6.71 m
	   - Average freeboard:	27.76 ft / 8.46 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 150.5 %
		- Above water (accommodation/working, high = better): 173.1 %
	Waterplane Area: 22,295 Square feet or 2,071 Square metres
	Displacement factor (Displacement / loading): 98 %
	Structure weight / hull surface area: 88 lbs/sq ft or 431 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.85
		- Longitudinal: 4.38
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

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