Luhai - Class
Fishery Protection Vessel
During the restructuration of the Chinese Navy, the Mulit-Purpose-Boats were clasified as Luhai-Class.
Displacement:
404 t light; 421 t standard; 452 t normal; 477 t full load
Dimensions:
Length overall / water x beam x draught
183,46 ft / 170,60 ft x 23,62 ft x 7,55 ft (normal load)
55,92 m / 52,00 m x 7,20 m x 2,30 m
Armament:
2 - 3,46" / 88,0 mm guns in single mounts, 20,79lbs / 9,43kg shells, 1946 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
1 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1946 Model
Anti-aircraft gun in deck mount
on centreline forward, 1 raised gun
4 - 0,79" / 20,0 mm guns (1x4 guns), 0,24lbs / 0,11kg shells, 1946 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
4 - 0,79" / 20,0 mm guns (2x2 guns), 0,24lbs / 0,11kg shells, 1946 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 45 lbs / 21 kg
Shells per gun, main battery: 300
2 - 21,0" / 533 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,98" / 25 mm 0,39" / 10 mm -
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 5.974 shp / 4.457 Kw = 24,00 kts
Range 2.000nm at 14,00 kts
Bunker at max displacement = 56 tons
Complement:
48 - 63
Cost:
£0,282 million / $1,129 million
Distribution of weights at normal displacement:
Armament: 6 tons, 1,3%
Armour: 3 tons, 0,7%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 3 tons, 0,7%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 149 tons, 33,0%
Hull, fittings & equipment: 166 tons, 36,7%
Fuel, ammunition & stores: 48 tons, 10,7%
Miscellaneous weights: 80 tons, 17,7%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
294 lbs / 133 Kg = 14,1 x 3,5 " / 88 mm shells or 0,3 torpedoes
Stability (Unstable if below 1.00): 1,05
Metacentric height 0,6 ft / 0,2 m
Roll period: 12,5 seconds
Steadiness - As gun platform (Average = 50 %): 48 %
- Recoil effect (Restricted arc if above 1.00): 0,36
Seaboat quality (Average = 1.00): 1,13
Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
and transom stern
Block coefficient: 0,520
Length to Beam Ratio: 7,22 : 1
'Natural speed' for length: 15,28 kts
Power going to wave formation at top speed: 75 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 30,00 degrees
Stern overhang: 2,62 ft / 0,80 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17,72 ft / 5,40 m
- Forecastle (20%): 17,06 ft / 5,20 m (16,73 ft / 5,10 m aft of break)
- Mid (50%): 16,73 ft / 5,10 m (10,83 ft / 3,30 m aft of break)
- Quarterdeck (20%): 10,83 ft / 3,30 m
- Stern: 10,83 ft / 3,30 m
- Average freeboard: 13,90 ft / 4,24 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 136,9%
- Above water (accommodation/working, high = better): 102,5%
Waterplane Area: 2.845 Square feet or 264 Square metres
Displacement factor (Displacement / loading): 106%
Structure weight / hull surface area: 24 lbs/sq ft or 117 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 10,50
- Overall: 0,68
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Breakdown of Miscellaneous Weight:
- 25 tons for 6 DC mortars
- 10 tons for 40 DC's (each 250 kg)
- 15 tons sonar equipment
- 15 tons hydrophone
- 15 tons for radar equipment
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Ships in Class:
HICMS Luhai-1
HICMS Luhai-2
HICMS Luhai-3
HICMS Luhai-4
HICMS Luhai-5
HICMS Luhai-6
HICMS Luhai-7
HICMS Luhai-8
HICMS Luhai-9
HICMS Luhai-10
HICMS Luhai-11
HICMS Luhai-12
HICMS Luhai-13
HICMS Luhai-14
HICMS Luhai-15