Ger/DD/1905, Germany Destroyer laid down 1905 (Engine 1933)
Displacement:
711 t light; 736 t standard; 797 t normal; 846 t full load
Dimensions: Length overall / water x beam x draught
270.33 ft / 270.00 ft x 28.00 ft x 10.00 ft (normal load)
82.40 m / 82.30 m x 8.53 m x 3.05 m
Armament:
2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model
Quick firing guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
Weight of broadside 64 lbs / 29 kg
Shells per gun, main battery: 250
2 - 18.0" / 457.2 mm above water torpedoes
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 23,972 shp / 17,883 Kw = 32.00 kts
Range 3,600nm at 12.00 kts
Bunker at max displacement = 110 tons
Complement:
74 - 97
Cost:
£0.090 million / $0.361 million
Distribution of weights at normal displacement:
Armament: 8 tons, 1.0 %
Machinery: 420 tons, 52.7 %
Hull, fittings & equipment: 283 tons, 35.5 %
Fuel, ammunition & stores: 86 tons, 10.8 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
233 lbs / 106 Kg = 7.3 x 4.0 " / 102 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 1.1 ft / 0.3 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 63 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.369
Length to Beam Ratio: 9.64 : 1
'Natural speed' for length: 16.43 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 62
Bow angle (Positive = bow angles forward): 1.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19.00 ft / 5.79 m
- Forecastle (31 %): 18.00 ft / 5.49 m
- Mid (31 %): 18.00 ft / 5.49 m (11.00 ft / 3.35 m aft of break)
- Quarterdeck (15 %): 11.00 ft / 3.35 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 13.29 ft / 4.05 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 178.2 %
- Above water (accommodation/working, high = better): 112.7 %
Waterplane Area: 4,594 Square feet or 427 Square metres
Displacement factor (Displacement / loading): 55 %
Structure weight / hull surface area: 29 lbs/sq ft or 140 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.49
- Longitudinal: 3.28
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
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Friday, February 04, 2005
Yet another run at the Ger/DD/1905 design
So, by going to higher power output machinery, I can make my F-class like design for a German destroyer for 1905 work. The ship was intended to make 32 knots and have 2-4in QF and 2-18in TT. That should be a pretty conservative design, only marginally edgy on speed.
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