Here is my design for a huge oil tanker built in memory of the first tanker of the same name (Knock Nevis ) and scapped as Mont in 2010. Feel free to comment on the design.
Knock Nevis II, United States World's Largest Oil Tanker
Displacement: 496,683 t light; 507,997 t standard; 565,714 t normal; 611,888 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(1,616.00 ft / 1,600.00 ft) x 220.00 ft x (75.00 ft / 80.34 ft)
(492.56 m / 487.68 m) x 67.06 m x (22.86 m / 24.49 m)
Machinery:
• Diesel Internal Combustion Motors,
• Direct drive, 4 shafts, 436,000 shp = 27.37 kts
• Range 40,000nm at 16.00 kts
• Bunker at max displacement = 103,891 tons (Diesel Oil)
Typical Complement: 20
Cost: £147.327 million / $589.309 million
Distribution of weights at normal displacement:
• Machinery: 10,431 tons, 1.8 %
• Hull, fittings & equipment: 121,252 tons, 21.4 %
• Fuel, ammunition & stores: 69,031 tons, 12.2 %
• Miscellaneous weights: 365,000 tons, 64.5 %
o Hull below water: 150,000 tons
o Hull above water: 100,000 tons
o On freeboard deck: 95,000 tons
o Above deck: 20,000 tons
Overall Survivability and Seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,082,976 lbs / 491,230 Kg = 10,027.6 x 6 " / 152 mm shells or 21.4 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 23.1 ft / 7.0 m
Roll period: 19.2 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 a flush deck,
a straight bulbous bow and small transom stern
Block coefficient (normal/deep): 0.750 / 0.757
Length to Beam Ratio: 7.27 : 1
'Natural speed' for length: 42.94 kts
Power going to wave formation at top speed: 35 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 5.27 degrees
Stern overhang: 10.00 ft / 3.05 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 65.00 ft / 19.81 m, 60.00 ft / 18.29 m
- Forward deck: 30.00 %, 60.00 ft / 18.29 m, 60.00 ft / 18.29 m
- Aft deck: 35.00 %, 60.00 ft / 18.29 m, 60.00 ft / 18.29 m
- Quarter deck: 15.00 %, 60.00 ft / 18.29 m, 60.00 ft / 18.29 m
- Average freeboard: 60.40 ft / 18.41 m
Ship Space, Strength and Comments:
Space - Hull below water (magazines/engines, low = better): 55.0 %
- Above water (accommodation/working, high = better): 335.6 %
Waterplane Area: 302,804 Square feet or 28,131 Square metres
Displacement factor (Displacement / loading): 147 %
Structure weight / hull surface area: 282 lbs/sq ft or 1,375 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.30
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, rides out heavy weather easily