Well, if you make a couple assumptions, the historical LST2 design can be made to work out OK in SS:
Landing Ship, Tank, United States LST laid down 1938
Displacement:
1,789 t light; 1,834 t standard; 2,023 t normal; 2,175 t full load
Dimensions: Length overall / water x beam x draught
330.01 ft / 328.00 ft x 50.00 ft x 5.50 ft (normal load)
100.59 m / 99.97 m x 15.24 m x 1.68 m
Armament:
1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1938 Model
Breech loading gun in deck mount
on centreline aft
8 - 1.10" / 27.9 mm guns in single mounts, 0.67lbs / 0.30kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread
8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1938 Model
Machine guns in deck mount
on side, all aft, all raised mounts - superfiring
Weight of broadside 19 lbs / 9 kg
Shells per gun, main battery: 300
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.50" / 13 mm 0.50" / 13 mm -
2nd: 0.50" / 13 mm 0.50" / 13 mm -
- Conning tower: 1.00" / 25 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 1,667 shp / 1,244 Kw = 12.93 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 341 tons
Complement:
150 - 196
Cost:
£0.400 million / $1.602 million
Distribution of weights at normal displacement:
Armament: 2 tons, 0.1 %
Armour: 7 tons, 0.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 4 tons, 0.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 46 tons, 2.3 %
Hull, fittings & equipment: 954 tons, 47.1 %
Fuel, ammunition & stores: 234 tons, 11.6 %
Miscellaneous weights: 780 tons, 38.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,957 lbs / 4,063 Kg = 663.5 x 3.0 " / 76 mm shells or 2.4 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 2.4 ft / 0.7 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 76 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.53
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.785
Length to Beam Ratio: 6.56 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 27 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.00 ft / 7.01 m
- Forecastle (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 16.00 ft / 4.88 m
- Quarterdeck (15 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 16.56 ft / 5.05 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 51.4 %
- Above water (accommodation/working, high = better): 287.5 %
Waterplane Area: 14,153 Square feet or 1,315 Square metres
Displacement factor (Displacement / loading): 225 %
Structure weight / hull surface area: 52 lbs/sq ft or 255 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.81
- 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, can fire her guns in the heaviest weather
Note: draft is average at light ship, with the ballast tanks pumped out. WIth those tanks full, average draft increases to 11 feet, while speed decreases to 12 knots and sea-keeping drops to 1.35.
This post has been edited 2 times, last edit by "Hrolf Hakonson" (May 3rd 2010, 4:26pm)