Final Design (hopefully). Dropped some range. Id rather keep the seekeeping, to even up the odds against faster DDs.
DD-1, Australia Destroyer laid down 1928
Displacement:
1,546 t light; 1,625 t standard; 1,895 t normal; 2,111 t full load
Dimensions: Length overall / water x beam x draught
371.92 ft / 370.00 ft x 35.00 ft x 12.90 ft (normal load)
113.36 m / 112.78 m x 10.67 m x 3.93 m
Armament:
5 - 4.72" / 120 mm guns in single mounts, 52.58lbs / 23.85kg shells, 1928 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 2 raised mounts - superfiring
8 - 1.57" / 40.0 mm guns (2x4 guns), 1.95lbs / 0.88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on centreline, all amidships
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1928 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 283 lbs / 129 kg
Shells per gun, main battery: 250
8 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.20" / 30 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 33,454 shp / 24,957 Kw = 33.00 kts
Range 5,900nm at 15.00 kts
Bunker at max displacement = 485 tons
Complement:
143 - 186
Cost:
£0.801 million / $3.203 million
Distribution of weights at normal displacement:
Armament: 35 tons, 1.9 %
Armour: 16 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 16 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 899 tons, 47.4 %
Hull, fittings & equipment: 576 tons, 30.4 %
Fuel, ammunition & stores: 349 tons, 18.4 %
Miscellaneous weights: 20 tons, 1.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
590 lbs / 268 Kg = 11.2 x 4.7 " / 120 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.31
Metacentric height 1.7 ft / 0.5 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.24
Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.397
Length to Beam Ratio: 10.57 : 1
'Natural speed' for length: 22.16 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 56
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: 21.90 ft / 6.68 m
- Forecastle (30 %): 19.00 ft / 5.79 m (14.00 ft / 4.27 m aft of break)
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 15.85 ft / 4.83 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 169.7 %
- Above water (accommodation/working, high = better): 88.4 %
Waterplane Area: 8,259 Square feet or 767 Square metres
Displacement factor (Displacement / loading): 79 %
Structure weight / hull surface area: 34 lbs/sq ft or 168 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.02
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily