WesWorld

Actively serving mine warfare vessels of the Marina Militare.

Ships in Class
Ten Unnamed Layed down 1934

Displacement:
200 t light; 205 t standard; 211 t normal; 216 t full load

Dimensions: Length overall / water x beam x draught
126.99 ft / 114.83 ft x 19.03 ft x 6.56 ft (normal load)
38.71 m / 35.00 m x 5.80 m x 2.00 m

Armament:
1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1934 Model
Quick firing gun in deck mount
on centreline forward
4 - 0.98" / 25.0 mm guns in single mounts, 0.55lbs / 0.25kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 16 lbs / 7 kg
Shells per gun, main battery: 100

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 500 shp / 373 Kw = 13.47 kts
Range 1,000nm at 10.00 kts
Bunker at max displacement = 11 tons

Complement:
26 - 35

Cost:
£0.052 million / $0.209 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.9 %
Machinery: 14 tons, 6.8 %
Hull, fittings & equipment: 143 tons, 67.9 %
Fuel, ammunition & stores: 11 tons, 5.4 %
Miscellaneous weights: 40 tons, 19.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
548 lbs / 248 Kg = 40.6 x 3.0 " / 76 mm shells or 0.8 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 0.5 ft / 0.1 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 32 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 1.28

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.515
Length to Beam Ratio: 6.03 : 1
'Natural speed' for length: 10.72 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 16
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 9.84 ft / 3.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 13.12 ft / 4.00 m
- Forecastle (20 %): 13.12 ft / 4.00 m
- Mid (20 %): 13.12 ft / 4.00 m (9.84 ft / 3.00 m aft of break)
- Quarterdeck (15 %): 6.56 ft / 2.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 9.19 ft / 2.80 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 50.8 %
- Above water (accommodation/working, high = better): 85.5 %
Waterplane Area: 1,423 Square feet or 132 Square metres
Displacement factor (Displacement / loading): 251 %
Structure weight / hull surface area: 47 lbs/sq ft or 228 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.57
- Longitudinal: 17.22
- Overall: 2.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily

Originaly by Red Admiral.

Ships in Class
RD61 though RD64 Layed down 1938
RD65 though RD69 Layed down 1941



Displacement:
404 t light; 419 t standard; 511 t normal; 585 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(205.50 ft / 196.85 ft) x 24.61 ft x (8.20 / 9.01 ft)
(62.64 m / 60.00 m) x 7.50 m x (2.50 / 2.75 m)

Armament:
1 - 2.99" / 76.0 mm 62.0 cal gun - 14.75lbs / 6.69kg shells, 300 per gun
Anti-air gun in deck and hoist mount, 1938 Model
1 x Single mount on centreline, forward deck forward
2 - 1.46" / 37.0 mm 54.0 cal guns - 1.66lbs / 0.75kg shells, 1,000 per gun
Anti-air guns in deck mounts, 1938 Model
2 x Single mounts on sides, aft deck centre
2 raised mounts
4 - 0.98" / 25.0 mm 45.0 cal guns - 0.48lbs / 0.22kg shells, 150 per gun
Anti-air guns in deck mounts, 1938 Model
4 x Single mounts on sides amidships
Weight of broadside 20 lbs / 9 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm -

Machinery:
Diesel Internal combustion motors,
Electric cruising motors plus geared drives, 2 shafts, 4,000 shp / 2,984 Kw = 21.43 kts
Range 6,000nm at 12.00 kts
Bunker at max displacement = 166 tons

Complement:
53 - 69

Cost:
£0.151 million / $0.603 million

Distribution of weights at normal displacement:
Armament: 7 tons, 1.5 %
Armour: 4 tons, 0.8 %
- Armament: 4 tons, 0.8 %
Machinery: 118 tons, 23.1 %
Hull, fittings & equipment: 234 tons, 45.9 %
Fuel, ammunition & stores: 107 tons, 20.9 %
Miscellaneous weights: 40 tons, 7.8 %
- Hull above water: 20 tons
- On freeboard deck: 20 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
950 lbs / 431 Kg = 70.9 x 3.0 " / 76 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 0.9 ft / 0.3 m
Roll period: 10.8 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 1.29

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.450 / 0.469
Length to Beam Ratio: 8.00 : 1
'Natural speed' for length: 16.42 kts
Power going to wave formation at top speed: 63 %
Trim (Max stability = 0, Max steadiness = 100): 39
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 14.76 ft / 4.50 m, 11.48 ft / 3.50 m
- Forward deck: 30.00 %, 11.48 ft / 3.50 m, 9.84 ft / 3.00 m
- Aft deck: 40.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
- Quarter deck: 15.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
- Average freeboard: 10.53 ft / 3.21 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 84.9 %
- Above water (accommodation/working, high = better): 117.6 %
Waterplane Area: 3,209 Square feet or 298 Square metres
Displacement factor (Displacement / loading): 168 %
Structure weight / hull surface area: 40 lbs/sq ft or 194 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 4.75
- Overall: 1.15
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily

40tons minesweeping gear

Originaly by Red Admiral.