Rachan, Thailand Aircraft Carrier laid down 1948
Displacement:
8,036 t light; 8,226 t standard; 8,634 t normal; 8,961 t full load
Dimensions: Length overall / water x beam x draught
555.00 ft / 555.00 ft x 55.00 ft x 18.00 ft (normal load)
169.16 m / 169.16 m x 16.76 m x 5.49 m
Armament:
8 - 2.99" / 76.0 mm guns in single mounts, 13.39lbs / 6.08kg shells, 1948 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
32 - 1.57" / 40.0 mm guns (8x4 guns), 1.95lbs / 0.89kg shells, 1948 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 170 lbs / 77 kg
Shells per gun, main battery: 150
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 410.11 ft / 125.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 114 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
2.36" / 60 mm 410.11 ft / 125.00 m 13.12 ft / 4.00 m
- Armour deck: 2.99" / 76 mm, Conning tower: 2.99" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 54,676 shp / 40,788 Kw = 30.00 kts
Range 4,000nm at 15.00 kts
Bunker at max displacement = 734 tons
Complement:
447 - 582
Cost:
£3.624 million / $14.496 million
Distribution of weights at normal displacement:
Armament: 21 tons, 0.2 %
Armour: 2,050 tons, 23.7 %
- Belts: 325 tons, 3.8 %
- Torpedo bulkhead: 470 tons, 5.4 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 1,228 tons, 14.2 %
- Conning Tower: 27 tons, 0.3 %
Machinery: 1,336 tons, 15.5 %
Hull, fittings & equipment: 2,629 tons, 30.4 %
Fuel, ammunition & stores: 598 tons, 6.9 %
Miscellaneous weights: 2,000 tons, 23.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,616 lbs / 5,722 Kg = 941.9 x 3.0 " / 76 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 2.3 ft / 0.7 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0.05
Seaboat quality (Average = 1.00): 1.08
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 10.09 : 1
'Natural speed' for length: 26.72 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.91 ft / 7.90 m
- Forecastle (20 %): 16.49 ft / 5.03 m
- Mid (50 %): 16.49 ft / 5.03 m
- Quarterdeck (15 %): 16.49 ft / 5.03 m
- Stern: 16.49 ft / 5.03 m
- Average freeboard: 17.24 ft / 5.26 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 122.6 %
- Above water (accommodation/working, high = better): 155.8 %
Waterplane Area: 22,178 Square feet or 2,060 Square metres
Displacement factor (Displacement / loading): 125 %
Structure weight / hull surface area: 78 lbs/sq ft or 383 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.04
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
50t Misc Weight, Radars
1600t Misc Weight, Hangar and flight deck accomodations (2 catapults, 2 elevators) for 30 aircraft (Jet or Prop)
150t Misc Weight, Aviation Ordnance