WesWorld

"49-ton Riverine Type" French gunboat laid down 1936

Displacement:
49 t light; 53 t standard; 62 t normal; 69 t full load

Dimensions: Length overall / water x beam x draught
88.58 ft / 88.58 ft x 13.12 ft x 3.28 ft (normal load)
27.00 m / 27.00 m x 4.00 m x 1.00 m

Armament:
1 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1936 Model
Dual purpose gun in deck mount
on centreline forward
1 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1936 Model
Anti-aircraft gun in deck mount
on centreline aft
2 - 0.55" / 14.0 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1936 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 15 lbs / 7 kg
Shells per gun, main battery: 250

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.59" / 15 mm 65.62 ft / 20.00 m 3.94 ft / 1.20 m
Ends: Unarmoured
Upper: 0.59" / 15 mm 39.37 ft / 12.00 m 3.28 ft / 1.00 m
Main Belt covers 114 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm 0.20" / 5 mm -
2nd: 0.59" / 15 mm 0.20" / 5 mm -
3rd: 0.59" / 15 mm - -

- Conning tower: 0.98" / 25 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 81 shp / 61 Kw = 10.00 kts
Range 3,400nm at 10.00 kts
Bunker at max displacement = 17 tons

Complement:
10 - 14

Cost:
£0.019 million / $0.076 million

Distribution of weights at normal displacement:
Armament: 2 tons, 3.0 %
Armour: 11 tons, 18.5 %
- Belts: 10 tons, 16.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 1.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.5 %
Machinery: 2 tons, 3.7 %
Hull, fittings & equipment: 26 tons, 41.5 %
Fuel, ammunition & stores: 13 tons, 20.5 %
Miscellaneous weights: 8 tons, 12.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
198 lbs / 90 Kg = 15.4 x 3.0 " / 75 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 0.3 ft / 0.1 m
Roll period: 9.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.29
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.570
Length to Beam Ratio: 6.75 : 1
'Natural speed' for length: 9.41 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 35
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: 9.84 ft / 3.00 m
- Forecastle (20 %): 5.58 ft / 1.70 m
- Mid (50 %): 5.58 ft / 1.70 m
- Quarterdeck (15 %): 5.58 ft / 1.70 m
- Stern: 6.56 ft / 2.00 m
- Average freeboard: 5.99 ft / 1.83 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 52.0 %
- Above water (accommodation/working, high = better): 85.5 %
Waterplane Area: 805 Square feet or 75 Square metres
Displacement factor (Displacement / loading): 159 %
Structure weight / hull surface area: 17 lbs/sq ft or 82 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.82
- Longitudinal: 5.93
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

This gunboat is designed for riverine duties. It is armored to resist machinegun fire.

Units in Class: 34