The Emilia class is indended for coastal patrol in Indochina and French Pacific island possessions. Each will work in conjunction with 4-5 50 ton wooden boats to conduct anti-piracy, customs, and inspection duties.
Emilia class, French Patrol Boat laid down 1928
Displacement:
384 t light; 399 t standard; 420 t normal; 438 t full load
Dimensions: Length overall / water x beam x draught
214.02 ft / 203.41 ft x 26.25 ft x 6.56 ft (normal load)
65.23 m / 62.00 m x 8.00 m x 2.00 m
Armament:
1 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1928 Model
Breech loading gun in deck mount
on centreline forward
1 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1928 Model
Breech loading gun in deck mount
on centreline aft
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 74 lbs / 33 kg
Shells per gun, main battery: 150
2 - 21.7" / 550 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm - -
4th: 0.98" / 25 mm - -
- Conning tower: 0.98" / 25 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 9,848 shp / 7,347 Kw = 27.00 kts
Range 2,600nm at 10.00 kts
Bunker at max displacement = 39 tons
Complement:
46 - 60
Cost:
£0.184 million / $0.735 million
Distribution of weights at normal displacement:
Armament: 9 tons, 2.2 %
Armour: 7 tons, 1.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 1.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.3 %
Machinery: 192 tons, 45.8 %
Hull, fittings & equipment: 155 tons, 36.9 %
Fuel, ammunition & stores: 37 tons, 8.8 %
Miscellaneous weights: 20 tons, 4.8 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
164 lbs / 74 Kg = 3.1 x 4.7 " / 120 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 0.8 ft / 0.2 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.21
Seaboat quality (Average = 1.00): 0.90
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.420
Length to Beam Ratio: 7.75 : 1
'Natural speed' for length: 14.26 kts
Power going to wave formation at top speed: 72 %
Trim (Max stability = 0, Max steadiness = 100): 77
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.37 ft / 5.60 m
- Forecastle (20 %): 13.94 ft / 4.25 m
- Mid (50 %): 10.50 ft / 3.20 m
- Quarterdeck (15 %): 10.50 ft / 3.20 m
- Stern: 10.50 ft / 3.20 m
- Average freeboard: 12.06 ft / 3.68 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 170.0 %
- Above water (accommodation/working, high = better): 112.9 %
Waterplane Area: 3,328 Square feet or 309 Square metres
Displacement factor (Displacement / loading): 59 %
Structure weight / hull surface area: 24 lbs/sq ft or 116 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 4.07
- Overall: 0.61
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
Thursday, May 16th 2024, 11:44am
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