Bremer Vulkan Typ 4 Schnellfrachter (Fast Cargo Ship)
Displacement: 6,722 t light; 7,034 t standard; 15,556 t normal; 22,373 t full load
Dimensions: Length overall / water x beam x draught
487.30 ft / 462.60 ft x 65.62 ft x 25.26 ft (normal load) [148.53 m / 141.00 m x 20.00 m x 7.70 m]
Machinery:
Diesel Internal combustion motors, Geared drive, 1 shaft, 11,426 shp / 8,524 Kw = 17.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 15,340 tons
Complement: 69 - 90
Cost: £1.668 million / $6.673 million
Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 306 tons, 2.0 %
Hull, fittings & equipment: 4,417 tons, 28.4 %
Fuel, ammunition & stores: 8,833 tons, 56.8 %
Miscellaneous weights: 2,000 tons, 12.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 9,747 lbs / 4,421 Kg = 90 x 6” / 152mm shells or 1.15 torpedoes
Stability (Unstable if below 1.00): 1.23
Metacentric height 3.9 ft / 1.2 m
Roll period: 14.0 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.710
Length to Beam Ratio: 7.05 : 1
'Natural speed' for length: 21.51 kts
Power going to wave formation at top speed: 40 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 45.93 ft / 14.00 m
- Forecastle (20 %): 42.65 ft / 13.00 m
- Mid (50 %): 31.17 ft / 9.50 m (29.53 ft / 9.00 m aft of break)
- Quarterdeck (15 %): 31.17 ft / 9.50 m
- Stern: 32.81 ft / 10.00 m
- Average freeboard: 35.29 ft / 10.76 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 22.1 %
- Above water (accommodation/working, high = better): 223.0 %
Waterplane Area: 24,417 Square feet or 2,268 Square metres
Displacement factor (Displacement / loading): 596 %
Structure weight / hull surface area: 83 lbs/sq ft or 408 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.80
- Longitudinal: 7.62
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, rides out heavy weather easily
Low stowed cargo simmed as additional bunkers -8,522 tons
True bunkers - 1,572 tons for 10,000 nm radius at 15 knots
Low-stowed cargo -6,950 tons
High stowed cargo simmed as miscellanous weight - 2,000 tons
Breakdown - 1,700 tons high-stowed cargo; 300 tons accounted for by deck handling gear.
Survivability reduced by a factor of 10 for commercial service
Crew complement reduced by a factor of 10 for commercial service