The Ger/DM/1913 specification seems to have mainly been based on wishful thinking. The empirical equation for computing propulsive power is also working against the specification. I had to settle for something less than the original concept, which is as follows:
Ger/ML/1913 1600 tons 350ft x 36ft
2-6in QF, 250 mines 40,000 SHP=35 knots
to be named the "Meteor"
This is the Springsharp report for what I could actually achieve in the current version of Springsharp:
Ger/DM/1913, Germany Destroyer Minelayer laid down 1913 (Engine 1950)
Displacement:
1,638 t light; 1,690 t standard; 1,850 t normal; 1,978 t full load
Dimensions: Length overall / water x beam x draught
351.26 ft / 350.00 ft x 36.00 ft x 13.00 ft (normal load)
107.06 m / 106.68 m x 10.97 m x 3.96 m
Armament:
2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1913 Model
Quick firing guns in deck mounts with hoists
on centreline ends, evenly spread
Weight of broadside 216 lbs / 98 kg
Shells per gun, main battery: 120
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 49,459 shp / 36,897 Kw = 34.50 kts
Range 4,000nm at 15.00 kts
Bunker at max displacement = 288 tons
Complement:
140 - 183
Cost:
£0.229 million / $0.915 million
Distribution of weights at normal displacement:
Armament: 27 tons, 1.5 %
Machinery: 925 tons, 50.0 %
Hull, fittings & equipment: 536 tons, 29.0 %
Fuel, ammunition & stores: 212 tons, 11.4 %
Miscellaneous weights: 150 tons, 8.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
464 lbs / 210 Kg = 4.3 x 6.0 " / 152 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.27
Metacentric height 1.7 ft / 0.5 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 55 %
- Recoil effect (Restricted arc if above 1.00): 0.30
Seaboat quality (Average = 1.00): 1.10
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.395
Length to Beam Ratio: 9.72 : 1
'Natural speed' for length: 18.71 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 3.00 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 (20 %): 22.00 ft / 6.71 m
- Mid (33 %): 22.00 ft / 6.71 m (14.00 ft / 4.27 m aft of break)
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 16.80 ft / 5.12 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 181.2 %
- Above water (accommodation/working, high = better): 164.2 %
Waterplane Area: 7,736 Square feet or 719 Square metres
Displacement factor (Displacement / loading): 68 %
Structure weight / hull surface area: 33 lbs/sq ft or 159 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.43
- Longitudinal: 2.55
- Overall: 0.51
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
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