As this design reveals, following *censored* the Philippines will adopt the Indian 35mm AA gun for new construction (and replacement on older vessels as time and materials permit) over the old 2-pdr previously used.
Also note, the torpedo tubes will not be disclosed in any official documents... ;-)
Filipino Calabarzon-class subtender, laid down 1930
Displacement:
1,000 t light; 1,026 t standard; 1,147 t normal; 1,244 t full load
Dimensions: Length overall / water x beam x draught
199.54 ft / 190.29 ft x 32.48 ft x 10.83 ft (normal load)
60.82 m / 58.00 m x 9.90 m x 3.30 m
Armament:
1 - 3.94" / 100 mm gun in single mounts, 32.00lbs / 14.51kg shells, 1930 Model
Quick firing gun in a deck mount with a hoist
on centreline forward
1 - 1.38" / 35.0 mm gun in a single mount, 1.32lbs / 0.60kg shells, 1930 Model
Anti-aircraft gun in a deck mount
on centreline aft
4 - 0.54" / 13.7 mm guns (1x4 guns), 0.11lbs / 0.05kg shells, 1930 Model
Anti-aircraft guns in a deck mount
on centreline aft, all raised guns - superfiring
2 - 0.54" / 13.7 mm guns in single mounts, 0.11lbs / 0.05kg shells, 1930 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 35 lbs / 16 kg
Shells per gun, main battery: 150
2 - 21.0" / 533.4 mm submerged torpedo tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm - 0.98" / 25 mm
2nd: 0.79" / 20 mm - -
3rd: 0.59" / 15 mm - -
- Conning tower: 3.15" / 80 mm
Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 1,500 shp / 1,119 Kw = 14.21 kts
Range 8,500nm at 10.00 kts (Bunkerage = 219 tons)
Complement:
98 - 128
Cost:
£0.187 million / $0.750 million
Distribution of weights at normal displacement:
Armament: 4 tons, 0.4 %
Armour: 10 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 7 tons, 0.6 %
Machinery: 45 tons, 4.0 %
Hull, fittings & equipment: 540 tons, 47.1 %
Fuel, ammunition & stores: 147 tons, 12.9 %
Miscellaneous weights: 400 tons, 34.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,942 lbs / 881 Kg = 63.6 x 3.9 " / 100 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.04
Metacentric height 1.0 ft / 0.3 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 49 %
- Recoil effect (Restricted arc if above 1.00): 0.05
Seaboat quality (Average = 1.00): 1.57
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.600
Length to Beam Ratio: 5.86 : 1
'Natural speed' for length: 13.79 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 31
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 15.26 ft / 4.65 m
- Forecastle (20 %): 10.66 ft / 3.25 m
- Mid (50 %): 9.51 ft / 2.90 m
- Quarterdeck (15 %): 9.51 ft / 2.90 m
- Stern: 9.51 ft / 2.90 m
- Average freeboard: 10.28 ft / 3.13 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 63.2 %
- Above water (accommodation/working, high = better): 85.9 %
Waterplane Area: 4,520 Square feet or 420 Square metres
Displacement factor (Displacement / loading): 215 %
Structure weight / hull surface area: 77 lbs/sq ft or 377 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.68
- Longitudinal: 4.89
- Overall: 1.87
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
25t for flag accomodations
375t for supplies/torpedoes