Palk Bay - Class
Seaplane Carrier
as laid down
Displacement:
6.661 t light; 6.835 t standard; 7.874 t normal; 8.706 t full load
Dimensions:
Length overall / water x beam x draught
508,95 ft / 500,00 ft x 65,00 ft x 16,00 ft (normal load)
155,13 m / 152,40 m x 19,81 m x 4,88 m
Armament:
4 - 4,13" / 105 mm guns in single mounts, 35,32lbs / 16,02kg shells, 1921 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 1,38" / 35,0 mm guns in single mounts, 1,31lbs / 0,59kg shells, 1921 Model
Anti-aircraft guns in deck mounts
on side, all amidships, 4 raised mounts - superfiring
6 - 0,59" / 15,0 mm guns in single mounts, 0,10lbs / 0,05kg shells, 1921 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 152 lbs / 69 kg
Shells per gun, main battery: 180
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,97" / 50 mm 0,79" / 20 mm -
2nd: 0,79" / 20 mm - -
3rd: 0,79" / 20 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 12.063 shp / 8.999 Kw = 19,53 kts
Range 14.000nm at 12,00 kts
Bunker at max displacement = 1.871 tons
Complement:
417 - 543
Cost:
£0,782 million / $3,129 million
Distribution of weights at normal displacement:
Armament: 19 tons, 0,2%
Armour: 17 tons, 0,2%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 17 tons, 0,2%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 415 tons, 5,3%
Hull, fittings & equipment: 4.210 tons, 53,5%
Fuel, ammunition & stores: 1.213 tons, 15,4%
Miscellaneous weights: 2.000 tons, 25,4%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
19.763 lbs / 8.965 Kg = 559,5 x 4,1 " / 105 mm shells or 3,7 torpedoes
Stability (Unstable if below 1.00): 1,13
Metacentric height 3,3 ft / 1,0 m
Roll period: 15,1 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0,03
Seaboat quality (Average = 1.00): 1,50
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,530
Length to Beam Ratio: 7,69 : 1
'Natural speed' for length: 22,36 kts
Power going to wave formation at top speed: 38 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24,60 ft / 7,50 m
- Forecastle (20%): 15,65 ft / 4,77 m
- Mid (50%): 15,65 ft / 4,77 m
- Quarterdeck (15%): 15,65 ft / 4,77 m
- Stern: 15,65 ft / 4,77 m
- Average freeboard: 16,37 ft / 4,99 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 47,8%
- Above water (accommodation/working, high = better): 159,1%
Waterplane Area: 22.261 Square feet or 2.068 Square metres
Displacement factor (Displacement / loading): 262%
Structure weight / hull surface area: 136 lbs/sq ft or 663 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1,73
- Longitudinal: 1,89
- Overall: 1,74
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
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after 25% refit
Displacement:
6.783 t light; 6.964 t standard; 7.874 t normal; 8.602 t full load
Dimensions:
Length overall / water x beam x draught
508,95 ft / 500,00 ft x 65,00 ft x 16,00 ft (normal load)
155,13 m / 152,40 m x 19,81 m x 4,88 m
Armament:
4 - 4,13" / 105 mm guns in single mounts, 35,32lbs / 16,02kg shells, 1921 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 1,57" / 40,0 mm guns (8x2 guns), 1,95lbs / 0,89kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, all amidships, 4 raised mounts - superfiring
12 - 0,79" / 20,0 mm guns (6x2 guns), 0,24lbs / 0,11kg shells, 1942 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 175 lbs / 80 kg
Shells per gun, main battery: 220
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,97" / 50 mm 0,79" / 20 mm -
2nd: 0,79" / 20 mm - -
3rd: 0,79" / 20 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 31.714 shp / 23.658 Kw = 25,20 kts
Range 15.000nm at 12,00 kts
Bunker at max displacement = 1.638 tons
Complement:
417 - 543
Cost:
£0,946 million / $3,786 million
Distribution of weights at normal displacement:
Armament: 22 tons, 0,3%
Armour: 19 tons, 0,2%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 19 tons, 0,2%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 828 tons, 10,5%
Hull, fittings & equipment: 3.413 tons, 43,3%
Fuel, ammunition & stores: 1.092 tons, 13,9%
Miscellaneous weights: 2.500 tons, 31,7%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13.115 lbs / 5.949 Kg = 371,3 x 4,1 " / 105 mm shells or 2,3 torpedoes
Stability (Unstable if below 1.00): 1,11
Metacentric height 3,2 ft / 1,0 m
Roll period: 15,2 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0,03
Seaboat quality (Average = 1.00): 1,21
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,530
Length to Beam Ratio: 7,69 : 1
'Natural speed' for length: 22,36 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24,60 ft / 7,50 m
- Forecastle (20%): 15,65 ft / 4,77 m
- Mid (50%): 15,65 ft / 4,77 m
- Quarterdeck (15%): 15,65 ft / 4,77 m
- Stern: 15,65 ft / 4,77 m
- Average freeboard: 16,37 ft / 4,99 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 71,7%
- Above water (accommodation/working, high = better): 159,1%
Waterplane Area: 22.261 Square feet or 2.068 Square metres
Displacement factor (Displacement / loading): 181%
Structure weight / hull surface area: 110 lbs/sq ft or 537 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1,36
- Longitudinal: 1,53
- Overall: 1,38
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
Breakdown of Miscellaneous Weight:
- 770 tons for other storage
- 1150 tons for aviation fuel
- 40 tons for bombs (50 x 800kg)
- 40 tons for bombs (80 x 500kg)
- 40 tons for bombs (160 x 250kg)
- 10 tons for bombs (200 x 50kg)
- 80 tons for aviation torpedoes (40 torpedoes)
- 70 tons for heavy lift crane (2x 35 ton crane)
- 100 tons for catapult
- 200 tons for 8 seaplanes [Carrier Air Wing 9 (VF-11 2x GY-196 / VS-4 6x GY-196)]
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Ships in Class:
HICMS Palk Bay; laid down 1921, refit 1942