I apparently neglected to post this design to its proper place, and had to hunt the stupid thing down and find it. Oops.
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Cam Ranh-class, Indochinese Submarine Chaser laid down 1944
Displacement:
125 t light; 133 t standard; 165 t normal; 190 t full load
Dimensions: Length overall / water x beam x draught
120.42 ft / 114.83 ft x 18.37 ft x 6.07 ft (normal load)
36.71 m / 35.00 m x 5.60 m x 1.85 m
Armament:
1 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1944 Model
Dual purpose gun in deck mount
on centreline forward
2 - 0.91" / 23.0 mm guns in single mounts, 0.37lbs / 0.17kg shells, 1944 Model
Machine guns in deck mounts
on side, all amidships
2 - 0.91" / 23.0 mm guns (1x2 guns), 0.37lbs / 0.17kg shells, 1944 Model
Machine guns in deck mount
on centreline aft
Weight of broadside 14 lbs / 7 kg
Shells per gun, main battery: 500
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm 0.20" / 5 mm -
- Conning tower: 0.59" / 15 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 1,100 shp / 820 Kw = 18.00 kts
Range 3,000nm at 15.00 kts
Bunker at max displacement = 58 tons
Complement:
22 - 29
Cost:
£0.066 million / $0.264 million
Distribution of weights at normal displacement:
Armament: 2 tons, 1.1 %
Armour: 1 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 0.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.2 %
Machinery: 28 tons, 17.1 %
Hull, fittings & equipment: 69 tons, 41.9 %
Fuel, ammunition & stores: 40 tons, 24.1 %
Miscellaneous weights: 25 tons, 15.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
318 lbs / 144 Kg = 24.7 x 3.0 " / 75 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.5 ft / 0.1 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.27
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.450
Length to Beam Ratio: 6.25 : 1
'Natural speed' for length: 12.84 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 41
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 13.12 ft / 4.00 m
- Forecastle (20 %): 10.50 ft / 3.20 m
- Mid (50 %): 7.87 ft / 2.40 m
- Quarterdeck (15 %): 7.87 ft / 2.40 m
- Stern: 7.87 ft / 2.40 m
- Average freeboard: 9.00 ft / 2.74 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.0 %
- Above water (accommodation/working, high = better): 102.6 %
Waterplane Area: 1,398 Square feet or 130 Square metres
Displacement factor (Displacement / loading): 170 %
Structure weight / hull surface area: 24 lbs/sq ft or 115 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.77
- Longitudinal: 10.06
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily
Breakdown of Miscellaneous Weights:
- 2 tons for DRBN-1 navigational DEM (radar)
- 3 tons for DUBV-8 sonar
- 15 tons for depth bombs
- 5 tons for light ASW rockets (Mousetrap equivalent)
Ships in Class:
-
Cam Ranh: Built Q1/1944.
-
Da Nang: Built Q1/1944.
-
Thi Nai: Built Q2/1944.
-
Vung Tau: Built Q3/1944.
-
Qhi Nhon: Built Q4/1945.
-
Nha Trang: Built Q1/1946.
-
My Tho: Built Q2/1946.
-
Can Tho: Built Q3/1946.
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