HMAS Admirality Isl, Australia Destroyer Leader laid down 1929
Displacement:
1,953 t light; 2,061 t standard; 2,477 t normal; 2,810 t full load
Dimensions: Length overall / water x beam x draught
401.92 ft / 400.00 ft x 39.00 ft x 14.00 ft (normal load)
122.50 m / 121.92 m x 11.89 m x 4.27 m
Armament:
5 - 4.72" / 120 mm guns in single mounts, 52.58lbs / 23.85kg shells, 1929 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 2 raised mounts - superfiring
2 - 4.72" / 120 mm guns in single mounts, 52.58lbs / 23.85kg shells, 1929 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
8 - 1.57" / 40.0 mm guns (2x4 guns), 1.95lbs / 0.88kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread
10 - 0.79" / 20.0 mm guns (5x2 guns), 0.24lbs / 0.11kg shells, 1929 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 386 lbs / 175 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, 38,241 shp / 28,528 Kw = 33.00 kts
Range 7,900nm at 15.00 kts
Bunker at max displacement = 749 tons
Complement:
175 - 228
Cost:
£1.055 million / $4.220 million
Distribution of weights at normal displacement:
Armament: 48 tons, 1.9 %
Armour: 16 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 16 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,106 tons, 44.6 %
Hull, fittings & equipment: 743 tons, 30.0 %
Fuel, ammunition & stores: 524 tons, 21.2 %
Miscellaneous weights: 40 tons, 1.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
874 lbs / 396 Kg = 16.6 x 4.7 " / 120 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.36
Metacentric height 2.1 ft / 0.6 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.42
Seaboat quality (Average = 1.00): 1.25
Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.397
Length to Beam Ratio: 10.26 : 1
'Natural speed' for length: 23.10 kts
Power going to wave formation at top speed: 63 %
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 (15.00 ft / 4.57 m aft of break)
- Mid (50 %): 15.00 ft / 4.57 m
- Quarterdeck (15 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 16.55 ft / 5.04 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 162.1 %
- Above water (accommodation/working, high = better): 105.0 %
Waterplane Area: 9,949 Square feet or 924 Square metres
Displacement factor (Displacement / loading): 89 %
Structure weight / hull surface area: 39 lbs/sq ft or 191 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.52
- Longitudinal: 1.79
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily