(Historical data)
Filipino Piquero-class destroyer, laid down 1931
Displacement: 1,556 t light; 1,633 t standard; 1,793 t normal; 1,920 t full load
Dimensions: Length overall / water x beam x draught
365.92 ft / 352.69 ft x 35.27 ft x 12.30 ft (normal load) [111.53 m / 107.50 m x 10.75 m x 3.75 m]
Armament:
6 - 4.53" / 115 mm guns (3x2 guns), 48.50lbs / 22.00kg shells, 1931 Model Quick firing guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring
2 - 1.38" / 35.0 mm guns (1x2 guns), 1.32lbs / 0.60kg shells, 1931 Model Anti-aircraft guns in deck mount on centreline aft, all raised guns - superfiring
8 - 0.54" / 13.7 mm guns (2x4 guns), 0.11lbs / 0.05kg shells, 1925 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts
4 - 0.54" / 13.7 mm guns in single mounts, 0.11lbs / 0.05kg shells, 1925 Model Machine guns in deck mounts on side ends, evenly spread
Weight of broadside 295 lbs / 134 kg
Shells per gun, main battery: 250
8 - 24.0" / 610 mm above water torpedoes
Depth charges @ 550lb each: 50
or Mines @ 1,000lb each: 30 (2 rails)
Armour:
Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.59" / 15 mm -
2nd: 0.79" / 20 mm - -
3rd: 0.59" / 15 mm - -
Machinery:
Oil fired boilers, steam turbines, Geared drive, 2 shafts, 36,500 shp / 27,229 Kw = 33.71 kts
Range 6,000nm at 12.00 kts (Bunkerage = 287 tons)
Complement: 137 - 179
Cost: £0.902 million / $3.609 million
Distribution of weights at normal displacement:
Armament: 35 tons, 2.0 %
Armour: 15 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 15 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 876 tons, 48.9 %
Hull, fittings & equipment: 585 tons, 32.6 %
Fuel, ammunition & stores: 237 tons, 13.2 %
Miscellaneous weights: 45 tons, 2.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 522 lbs / 237 Kg = 11.3 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 1.3 ft / 0.4 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.61
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has rise forward of midbreak and transom stern
Block coefficient: 0.410
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 21.69 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (57 %): 18.86 ft / 5.75 m (10.66 ft / 3.25 m aft of break)
- Quarterdeck (15 %): 10.66 ft / 3.25 m
- Stern: 10.66 ft / 3.25 m
- Average freeboard: 15.78 ft / 4.81 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 176.7 %
- Above water (accommodation/working, high = better): 72.7 %
Waterplane Area: 7,996 Square feet or 743 Square metres
Displacement factor (Displacement / loading): 71 %
Structure weight / hull surface area: 37 lbs/sq ft or 180 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.24
- Overall: 0.58
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
Misc weight
37t = depth charges/mines
8t = climatisation
Piquero – laid down 1931
Garceta – laid down 1931
Flamenco – laid down 1931
Serreta – laid down 1931
Aguilucho – laid down 1931
Busardo – laid down 1932
Polluela – laid down 1932
Calamón – laid down 1932
Grulla – laid down 1932
Avoceta – laid down 1933
Pluvial – laid down 1933
Pardela – laid down 1933
Refitted 1945 as follows:
Piquero, Philippine Destroyer laid down 1931
Displacement: 1,569 t light; 1,633 t standard; 1,793 t normal; 1,920 t full load
Dimensions: Length overall / water x beam x draught
365.92 ft / 352.69 ft x 35.27 ft x 12.30 ft (normal load) [111.53 m / 107.50 m x 10.75 m x 3.75 m]
Armament:
4 - 4.53" / 115 mm guns (2x2 guns), 46.40lbs / 21.05kg shells, 1944 Model Dual purpose guns in deck mounts with hoists on centreline ends, evenly spread
8 - 1.38" / 35.0 mm guns (2x4 guns), 1.31lbs / 0.59kg shells, 1944 Model Anti-aircraft guns in deck mounts on centreline ends, evenly spread, all raised mounts
2 - 0.54" / 13.7 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1925 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts - superfiring
Weight of broadside 196 lbs / 89 kg
Shells per gun, main battery: 250
4 - 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 -
2nd: 0.59" / 15 mm - -
3rd: 0.39" / 10 mm - -
Conning tower: 0.98" / 25 mm
Machinery:
Oil fired boilers, steam turbines, Geared drive, 2 shafts, 36,484 shp / 27,217 Kw = 33.71 kts
Range 6,000nm at 12.00 kts
Bunker at max displacement = 287 tons
Complement: 137 - 179
Cost: £0.874 million / $3.497 million
Distribution of weights at normal displacement:
Armament: 25 tons, 1.4 %
Armour: 13 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 892 tons, 49.7 %
Hull, fittings & equipment: 575 tons, 32.1 %
Fuel, ammunition & stores: 224 tons, 12.5 %
Miscellaneous weights: 65 tons, 3.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 559 lbs / 253 Kg = 12.0 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 73 %
- Recoil effect (Restricted arc if above 1.00): 0.36
Seaboat quality (Average = 1.00): 1.05
Hull form characteristics:
Hull has rise forward of midbreak and transom stern
Block coefficient: 0.410
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 21.69 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (57 %): 18.86 ft / 5.75 m (10.66 ft / 3.25 m aft of break)
- Quarterdeck (15 %): 10.66 ft / 3.25 m
- Stern: 10.66 ft / 3.25 m
- Average freeboard: 15.78 ft / 4.81 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 175.7 %
- Above water (accommodation/working, high = better): 122.9 %
Waterplane Area: 7,996 Square feet or 743 Square metres
Displacement factor (Displacement / loading): 73 %
Structure weight / hull surface area: 36 lbs/sq ft or 178 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 2.31
- Overall: 0.60
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Breakdown of Miscellaneous weight:
Radar - 20 tons
Sonar - 20 tons
A/S outfit - four A/S mortars and two D/C racks - 25 tons
Level 3 Refit - 15%
Upgrade armament outfit - 115mm DP vice QF, modernize and expand 35mm battery, reduce 13.7mm machineguns (one retained on each bridge wing for local defense), reduce torpedo tubes
Add radar, add sonar
Remove mine rails and add A/S outfit
Provide armor protection for conning tower
Service life extension.
Cost: 235 tons
Time to execute: 48 days
Piquero - Refit commenced 9 June 1945, Refit completed 27 July 1945
Garceta - Refit commenced 10 August 1945, Refit completed 27 September 1945
Flamenco - Refit commenced 9 September 1945; Refit completed 27 October 1945
Aguilucho - Refit commenced 9 September 1945; Refit completed 27 October 1945
Pollueta - Refit commenced 11 October 1945; Refit complete 28 November 1945
Serreta - Refit commenced 10 November 1945; Refit complete 28 December 1945
Busardo - Refit commenced 10 November 1945; Refit complete 28 December 1945
Calamón - Refit commenced 12 December 1945; Refit complete 29 January 1946
Grulla - Refit commenced 11 January 1946; Refit complete 28 February 1946
Avoceta - Refit commenced 11 January 1946; Refit complete 28 February 1946
Pardela - Refit commenced 1 July 1946; Refit complete 18 August 1946
Pluvial - Refit commenced 1 October 1946; Refit complete 18 November 1946