Châteaurenault, French transport de chalands de débarquement laid down 1941
Displacement:
7,539 t light; 7,787 t standard; 9,752 t normal; 11,324 t full load
Dimensions: Length overall / water x beam x draught
504.96 ft / 492.13 ft x 70.54 ft x 17.72 ft (normal load)
153.91 m / 150.00 m x 21.50 m x 5.40 m
Armament:
4 - 3.94" / 100 mm guns (2x2 guns), 35.27lbs / 16.00kg shells, 1941 Model
Dual purpose guns in deck mounts with hoists
on centreline, all forward, 1 raised mount - superfiring
16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.89kg shells, 1941 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 172 lbs / 78 kg
Shells per gun, main battery: 500
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 6,253 shp / 4,665 Kw = 16.00 kts
Range 16,000nm at 16.00 kts
Bunker at max displacement = 3,537 tons
Complement:
489 - 637
Cost:
£1.874 million / $7.495 million
Distribution of weights at normal displacement:
Armament: 19 tons, 0.2 %
Machinery: 165 tons, 1.7 %
Hull, fittings & equipment: 2,855 tons, 29.3 %
Fuel, ammunition & stores: 2,213 tons, 22.7 %
Miscellaneous weights: 4,500 tons, 46.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
20,332 lbs / 9,222 Kg = 666.4 x 3.9 " / 100 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 3.6 ft / 1.1 m
Roll period: 15.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 1.64
Hull form characteristics:
Hull has low quarterdeck
and transom stern
Block coefficient: 0.555
Length to Beam Ratio: 6.98 : 1
'Natural speed' for length: 25.92 kts
Power going to wave formation at top speed: 30 %
Trim (Max stability = 0, Max steadiness = 100): 43
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (20 %): 21.33 ft / 6.50 m
- Mid (50 %): 16.40 ft / 5.00 m
- Quarterdeck (30 %): 9.84 ft / 3.00 m (16.40 ft / 5.00 m before break)
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 16.55 ft / 5.05 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 58.5 %
- Above water (accommodation/working, high = better): 176.5 %
Waterplane Area: 25,343 Square feet or 2,354 Square metres
Displacement factor (Displacement / loading): 196 %
Structure weight / hull surface area: 84 lbs/sq ft or 412 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.20
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Notes:
- 1975.5 tons for water in well deck simmed as fuel; range is actually 8,000nm at 16 knots
- Well deck is 45m long by 15.5m wide by 2.75 meters deep, with total water weight of 1,918.125 tons
The well deck can hold:
- 2x CDIC-200s, 2x EDA-55s, and 1x EA-13
- 6x EDA-55s and 1x EA-13
- 13x EA-13s
- 2x CDIC-200s and 5x EA-13s
Breakdown of Miscellaneous Weights:
- 1600 tons for 800 troops
- 560 tons for tanks (16x35t tanks)
- 624 tons for vehicles (50x12t vehicles)
- 330 tons for six
EDA-55 vehicle landing craft (55t each) in aft well
- 52 tons for 4
EA-13 infantry landing craft (13 tons each) in davits
- 150 tons for vehicle, tank, and landing craft spares.
- 100 tons for vehicle and small boat repair shop+crane
- 19 tons for high-capacity pumps (to flood or drain well deck)
- 1,000 tons for combat supplies
- 65 tons for radio-teledetection equipment and other electronics
Total: 4,500 tons
Ships in Class:
-
Châteaurenault (1941)
-
Destrées (1943)