More about the Makin Island

I wondered if by lightening the ship if the Makin Island could make a higher speed than 25 knots. I was not very successful, but I thought that I would make the Springsharp report available to those who are interested. I did not attempt to do anything except get a reasonably good speed for the dimensions, power, number of shafts, and displacement. I didn't attempt to deal with the actual ship configuration:

Makin Island, United States LHD laid down 1950

Displacement:
 35,420 t light; 36,197 t standard; 38,843 t normal; 40,960 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (808.09 ft / 780.00 ft) x 106.00 ft x (27.00 / 28.17 ft)
 (246.31 m / 237.74 m) x 32.31 m  x (8.23 / 8.58 m)

Machinery:
 Diesel Internal combustion motors, 
 Geared drive, 2 shafts, 70,363 shp / 52,491 Kw = 25.46 kts
 Range 9,500nm at 15.00 kts
 Bunker at max displacement = 4,762 tons

Complement:
 1,383 - 1,798

Cost:
 £11.535 million / $46.139 million

Distribution of weights at normal displacement:
 Armament: 0 tons, 0.0 %
 Machinery: 1,683 tons, 4.3 %
 Hull, fittings & equipment: 33,737 tons, 86.9 %
 Fuel, ammunition & stores: 3,423 tons, 8.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   358,561 lbs / 162,641 Kg = 3,320.0 x 6 " / 152 mm shells or 29.2 torpedoes
 Stability (Unstable if below 1.00): 1.05
 Metacentric height 6.0 ft / 1.8 m
 Roll period: 18.1 seconds
 Steadiness - As gun platform (Average = 50 %): 100 %
   - 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,
   an extended bulbous bow and large transom stern
 Block coefficient (normal/deep): 0.609 / 0.616
 Length to Beam Ratio: 7.36 : 1
 'Natural speed' for length: 32.28 kts
 Power going to wave formation at top speed: 44 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 30.00 degrees
 Stern overhang: 5.00 ft / 1.52 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  40.00 ft / 12.19 m,  40.00 ft / 12.19 m
    - Forward deck: 30.00 %,  40.00 ft / 12.19 m,  40.00 ft / 12.19 m
    - Aft deck: 35.00 %,  40.00 ft / 12.19 m,  40.00 ft / 12.19 m
    - Quarter deck: 15.00 %,  40.00 ft / 12.19 m,  40.00 ft / 12.19 m
    - Average freeboard:  40.00 ft / 12.19 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 16.0 %
  - Above water (accommodation/working, high = better): 350.2 %
 Waterplane Area: 63,568 Square feet or 5,906 Square metres
 Displacement factor (Displacement / loading): 1,000 %
 Structure weight / hull surface area: 343 lbs/sq ft or 1,674 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 2.40
  - Longitudinal: 6.34
  - Overall: 2.64
 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