Derived from earlier Philippine destroyer design studies - this ship is a bit longer and beamier, slightly slower but with a greater radius of action. The tonnage rises commensurately, but not outrageously so. Certainly at the high end of a mix of ships.
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Improved Pinatubo class, Philippine Destroyer laid down 1943
Displacement: 2,100 t light; 2,221 t standard; 2,552 t normal; 2,817 t full load
Dimensions: Length overall / water x beam x draught
401.76 ft / 393.70 ft x 39.37 ft x 12.80 ft (normal load) [122.46 m / 120.00 m x 12.00 m x 3.90 m]
Armament:
6 - 5.12" / 130 mm guns (3x2 guns), 67.03lbs / 30.40kg shells, 1943 Model Dual purpose guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring
2 - 1.38" / 35.0 mm guns (1x2 guns), 1.31lbs / 0.59kg shells, 1941 Model Anti-aircraft guns in deck mount on centreline aft, all raised guns - superfiring
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.31lbs / 0.59kg shells, 1941 Model Anti-aircraft guns in deck mounts on side, evenly spread
Weight of broadside 415 lbs / 188 kg
Shells per gun, main battery: 300
8 - 24.0" / 610 mm above water torpedoes
Armour:
Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
2nd: 0.59" / 15 mm - -
3rd: 0.59" / 15 mm - -
Conning tower: 0.98" / 25 mm
Machinery:
Oil fired boilers, steam turbines, Geared drive, 2 shafts, 40,731 shp / 30,385 Kw = 33.00 kts
Range 7,000nm at 15.00 kts
Bunker at max displacement = 595 tons
Complement: 179 - 233
Cost: £1.720 million / $6.879 million
Distribution of weights at normal displacement:
Armament: 52 tons, 2.0 %
Armour: 21 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 17 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 4 tons, 0.2 %
Machinery: 1,040 tons, 40.8 %
Hull, fittings & equipment: 916 tons, 35.9 %
Fuel, ammunition & stores: 453 tons, 17.7 %
Miscellaneous weights: 70 tons, 2.7 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 1,200 lbs / 545 Kg = 17.9 x 5.1 " / 130 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.7 ft / 0.5 m
Roll period: 12.7 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.14
Hull form characteristics:
Hull has a flush deck and transom stern
Block coefficient: 0.450
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 22.78 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 61
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.15 ft / 6.75 m
- Forecastle (20 %): 19.19 ft / 5.85 m
- Mid (50 %): 15.91 ft / 4.85 m
- Quarterdeck (15 %): 15.91 ft / 4.85 m
- Stern: 15.91 ft / 4.85 m
- Average freeboard: 17.30 ft / 5.27 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 152.0 %
- Above water (accommodation/working, high = better): 97.5 %
Waterplane Area: 10,273 Square feet or 954 Square metres
Displacement factor (Displacement / loading): 98 %
Structure weight / hull surface area: 47 lbs/sq ft or 229 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.60
- Longitudinal: 2.28
- Overall: 0.68
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Breakdown of miscellaneous Weight
Reserved for radar and other electronics - 40 tons
Tropicalization - 30 tons