Found
here
IPS, Pacifica Island Patrol Ship laid down 1938
Ships: IPS-1, IPS-2, IPS-3, IPS-4.
Displacement:
500 t light; 525 t standard; 665 t normal; 777 t full load
Dimensions: Length overall / water x beam x draught
229.56 ft / 225.00 ft x 25.00 ft x 9.00 ft (normal load)
69.97 m / 68.58 m x 7.62 m x 2.74 m
Armament:
2 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
4 - 1.97" / 50.0 mm guns (2x2 guns), 3.81lbs / 1.73kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts
8 - 0.52" / 13.2 mm guns (2x4 guns), 0.07lbs / 0.03kg shells, 1938 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
(*) 20 - 0.45" / 11.4 mm guns in single mounts, 0.05lbs / 0.02kg shells, 1938 Model
Machine guns in deck mounts
on side, evenly spread
(*) 65 - 0.30" / 7.7 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1938 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 43 lbs / 20 kg
Shells per gun, main battery: 350
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
- Conning tower: 1.00" / 25 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 5,172 shp / 3,858 Kw = 22.00 kts
Range 10,000nm at 12.00 kts
Bunker at max displacement = 252 tons
Complement:
65 - 85
Cost:
£0.236 million / $0.944 million
Distribution of weights at normal displacement:
Armament: 5 tons, 0.8%
Armour: 7 tons, 1.1%
- Belts: 0 tons, 0.0%
- Torpedo bulkhead: 0 tons, 0.0%
- Armament: 6 tons, 0.9%
- Armour Deck: 0 tons, 0.0%
- Conning Tower: 2 tons, 0.2%
Machinery: 142 tons, 21.3%
Hull, fittings & equipment: 271 tons, 40.7%
Fuel, ammunition & stores: 164 tons, 24.7%
Miscellaneous weights: 75 tons, 11.3%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,045 lbs / 474 Kg = 81.2 x 3.0 " / 75 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 0.8 ft / 0.2 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.21
Seaboat quality (Average = 1.00): 1.53
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.460
Length to Beam Ratio: 9.00 : 1
'Natural speed' for length: 15.00 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.00 ft / 5.18 m
- Forecastle (20%): 10.75 ft / 3.28 m
- Mid (50%): 10.75 ft / 3.28 m
- Quarterdeck (15%): 10.75 ft / 3.28 m
- Stern: 10.75 ft / 3.28 m
- Average freeboard: 11.25 ft / 3.43 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 89.5%
- Above water (accommodation/working, high = better): 113.9%
Waterplane Area: 3,616 Square feet or 336 Square metres
Displacement factor (Displacement / loading): 163%
Structure weight / hull surface area: 37 lbs/sq ft or 180 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.86
- Longitudinal: 3.90
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
(*) = crew armament (7.7 MG, 7.7 rifle, 0.45 SMG)