I just tried the Ger/CL/1914 design in Springsharp, and using the methods that I learned from The Red Admiral from WesWorld, I was able to create what seems to be a reasonable design. This is a weight comparison between my 1971 design and what Springsharp produced:
Original Springsharp
Machinery: 1,335 tons 1,676 tons
Hull: 1,500 tons 1,038 tons
Protection: 110 tons 222 tons
Oil Fuel: 700 tons 694 tons (max. bunker)
This is the complete Springsharp report:
Ger/CL/1914, Germany Light Cruiser laid down 1914 (Engine 1917)
Displacement:
3,006 t light; 3,140 t standard; 3,500 t normal; 3,788 t full load
Dimensions: Length overall / water x beam x draught
431.87 ft / 430.00 ft x 40.00 ft x 16.00 ft (normal load)
131.63 m / 131.06 m x 12.19 m x 4.88 m
Armament:
3 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1914 Model
Quick firing guns in deck mounts with hoists
on centreline ends, majority aft, 1 raised mount aft
6 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1914 Model
Quick firing guns in deck mounts with hoists
on side, evenly spread
Weight of broadside 563 lbs / 255 kg
Shells per gun, main battery: 180
4 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Armour deck: 1.00" / 25 mm, Conning tower: 4.00" / 102 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 48,865 shp / 36,453 Kw = 32.00 kts
Range 4,200nm at 15.00 kts
Bunker at max displacement = 648 tons
Complement:
226 - 295
Cost:
£0.508 million / $2.031 million
Distribution of weights at normal displacement:
Armament: 70 tons, 2.0 %
Armour: 222 tons, 6.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 202 tons, 5.8 %
- Conning Tower: 20 tons, 0.6 %
Machinery: 1,676 tons, 47.9 %
Hull, fittings & equipment: 1,038 tons, 29.7 %
Fuel, ammunition & stores: 494 tons, 14.1 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,151 lbs / 522 Kg = 18.4 x 5.0 " / 127 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.39
Metacentric height 2.3 ft / 0.7 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 66 %
- Recoil effect (Restricted arc if above 1.00): 0.47
Seaboat quality (Average = 1.00): 1.31
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.445
Length to Beam Ratio: 10.75 : 1
'Natural speed' for length: 20.74 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 25.00 ft / 7.62 m
- Forecastle (20 %): 22.00 ft / 6.71 m
- Mid (34 %): 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: 16.96 ft / 5.17 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 170.6 %
- Above water (accommodation/working, high = better): 121.6 %
Waterplane Area: 10,928 Square feet or 1,015 Square metres
Displacement factor (Displacement / loading): 80 %
Structure weight / hull surface area: 48 lbs/sq ft or 232 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.61
- Longitudinal: 1.79
- Overall: 0.67
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
No comments:
Post a Comment