Arabe-class, French Aviso-dragueurs laid down 1943
Displacement:
634 t light; 672 t standard; 837 t normal; 970 t full load
Dimensions: Length overall / water x beam x draught
234.32 ft / 229.66 ft x 27.89 ft x 10.17 ft (normal load)
71.42 m / 70.00 m x 8.50 m x 3.10 m
Armament:
2 - 3.94" / 100 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 78 lbs / 36 kg
Shells per gun, main battery: 450
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 8,405 shp / 6,270 Kw = 25.00 kts
Range 6,800nm at 15.00 kts
Bunker at max displacement = 298 tons
Complement:
77 - 101
Cost:
£0.391 million / $1.566 million
Distribution of weights at normal displacement:
Armament: 9 tons, 1.0 %
Armour: 3 tons, 0.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 217 tons, 25.9 %
Hull, fittings & equipment: 226 tons, 27.0 %
Fuel, ammunition & stores: 203 tons, 24.3 %
Miscellaneous weights: 180 tons, 21.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
547 lbs / 248 Kg = 17.9 x 3.9 " / 100 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.9 ft / 0.3 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 1.13
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.450
Length to Beam Ratio: 8.24 : 1
'Natural speed' for length: 17.69 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 47
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: 17.39 ft / 5.30 m
- Forecastle (25 %): 16.08 ft / 4.90 m
- Mid (50 %): 14.76 ft / 4.50 m (8.53 ft / 2.60 m aft of break)
- Quarterdeck (15 %): 8.53 ft / 2.60 m
- Stern: 8.53 ft / 2.60 m
- Average freeboard: 12.27 ft / 3.74 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 117.3 %
- Above water (accommodation/working, high = better): 119.7 %
Waterplane Area: 4,244 Square feet or 394 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 27 lbs/sq ft or 133 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.55
- Longitudinal: 2.94
- Overall: 0.65
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Breakdown of Miscellaneous Weights:
- 17 tons for electronics
- 15 tons for hydrophones and ASDIC
- 17 tons for depth charges (64x573-lb bombs)
- 25 tons for Lance roquettes anti-sous-marin de 265mm modèle 1942
- 10 tons for HVAC
- 16 tons for miscellaneous radio, electronics and ECM gear
- 20 tons for crew comforts
- 60 tons for minesweeping equipment
180 tons total miscellaneous weight
Electronics:
Not yet Finalized
Ships in Class:
Chi Lang Group
-
Chi Lang (ex-
Algérien): Laid down at Nouméa July 1943, completed April 1944
-
Van Kiep (ex-
Bambara): Laid down at Nouméa January 1944, completed October 1944
-
Dong Da: Laid down at Nouméa July 1944, completed April 1945
-
Tuy Dong: Laid down at Nouméa January 1945, completed October 1945
-
Tay Cay: Laid down at Nouméa July 1945, completed April 1946
-
Can Don: Laid down at Nouméa January 1946, completed October 1946
-
Ngoc Hoi: Laid down at Nouméa July 1946, completed April 1947
-
Bach Dang: Laid down at Nouméa January 1947, completed October 1947
Notes:
This class was originally ordered by the Marine Nationale. Due to concerns in Indochina stemming from Asian conflict in 1943, the
Algérien was transferred to Indochina shortly after her launch, and renamed
Chi Lang; the
Bambara was similarly transferred shortly after she was laid down in 1944, and renamed
Van Kiep. Six more ships would follow over the next few years.