Corvettes

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M_Fredi

Intermediate

Posts: 195

Tuesday, May 19th 2020, 8:46pm

Corvettes

Corvettes of the Kingdom of Greece

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M_Fredi

Intermediate

Posts: 195

Tuesday, May 19th 2020, 8:47pm

Porject AS1, Kingdom of Greece Corvette laid down 1949

Displacement:
381 t light; 402 t standard; 504 t normal; 586 t full load

Dimensions: Length overall / water x beam x draught
228,47 ft / 223,10 ft x 20,28 ft x 9,51 ft (normal load)
69,64 m / 68,00 m x 6,18 m x 2,90 m

Armament:
2 - 4,13" / 105 mm guns (1x2 guns), 35,32lbs / 16,02kg shells, 1949 Model
Dual purpose guns in deck mount
on centreline forward
8 - 1,57" / 40,0 mm guns (2x4 guns), 1,95lbs / 0,88kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 86 lbs / 39 kg
Shells per gun, main battery: 200

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 3.029 shp / 2.259 Kw = 21,00 kts
Range 5.000nm at 16,00 kts
Bunker at max displacement = 184 tons

Complement:
53 - 69

Cost:
£0,249 million / $0,997 million

Distribution of weights at normal displacement:
Armament: 11 tons, 2,1 %
Machinery: 73 tons, 14,5 %
Hull, fittings & equipment: 236 tons, 46,8 %
Fuel, ammunition & stores: 123 tons, 24,4 %
Miscellaneous weights: 62 tons, 12,2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
921 lbs / 418 Kg = 26,1 x 4,1 " / 105 mm shells or 0,6 torpedoes
Stability (Unstable if below 1.00): 1,11
Metacentric height 0,6 ft / 0,2 m
Roll period: 11,4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0,38
Seaboat quality (Average = 1.00): 2,00

Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
and transom stern
Block coefficient: 0,410
Length to Beam Ratio: 11,00 : 1
'Natural speed' for length: 17,12 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 25
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: 14,76 ft / 4,50 m
- Forecastle (20 %): 13,12 ft / 4,00 m (11,48 ft / 3,50 m aft of break)
- Mid (50 %): 10,66 ft / 3,25 m (9,84 ft / 3,00 m aft of break)
- Quarterdeck (15 %): 9,84 ft / 3,00 m
- Stern: 10,66 ft / 3,25 m
- Average freeboard: 11,06 ft / 3,37 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78,3 %
- Above water (accommodation/working, high = better): 108,8 %
Waterplane Area: 2.908 Square feet or 270 Square metres
Displacement factor (Displacement / loading): 171 %
Structure weight / hull surface area: 32 lbs/sq ft or 157 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,84
- Longitudinal: 6,09
- Overall: 1,02
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc weight:
Anti-sumbarine ahead throw weapon (10 tons)
Depth charge raks and 48 depth charges (11 tons)
40mm automatic equiment (9 tons)

Electronics:
DRBV-9 surface and air search radars (1 radars, 7,5 tons)
DRBC-3B fire-control radar (1 radars, 4 tons)
DRBI-3 height-finding radar (1 radar, 7 tons)
SAGEM HF/DF (3 tons)
ASDIC (8 tons)
Gunnery Computer for the 105mm and 40mm guns (2 tons)

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