Turkey transferred 2000tons to Italy so I might as well use it. These boats are good as all purpose ships, powerful gun and torpedo armament, adequate range for escorting Med. convoys and they are nice and fast as well. Best thing is that they are cheap and unlimited by treaty. Expect a lot of these to appear, 4 is only the tip of the iceberg...
RM Spica, Italian Torpedo Boat laid down 1926
Displacement:
599 t light; 621 t standard; 678 t normal; 721 t full load
Loading submergence 93 tons/feet
Dimensions:
262.47 ft x 22.97 ft x 9.84 ft (normal load)
80.00 m x 7.00 m x 3.00 m
Armament:
3 - 3.94" / 100 mm guns
4 - 1.46" / 37 mm guns
6 - 0.79" / 20 mm AA guns
Weight of broadside 99 lbs / 45 kg
4 - 21.0" / 533 mm above water torpedoes
Armour:
Main gun shields 0.79" / 20 mm, 2nd gun shields 0.39" / 10 mm
Conning tower 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 28,000 shp / 20,888 Kw = 33.85 kts
Range 2,000nm at 15.00 kts
Complement:
66 - 86
Cost:
£0.286 million / $1.142 million
Distribution of weights at normal displacement:
Armament: 12 tons, 1.8 %
Armour: 8 tons, 1.1 %
Belts: 0 tons, 0.0 %, Armament: 3 tons, 0.5 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 5 tons, 0.7 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 366 tons, 54.0 %
Hull, fittings & equipment: 203 tons, 29.9 %
Fuel, ammunition & stores: 79 tons, 11.7 %
Miscellaneous weights: 10 tons, 1.5 %
Metacentric height 0.6
Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.08
Shellfire needed to sink: 137 lbs / 62 Kg = 4.5 x 3.9 " / 100 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 50 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.31
Relative quality as seaboat: 0.74
Hull form characteristics:
Block coefficient: 0.400
Sharpness coefficient: 0.28
Hull speed coefficient 'M': 9.13
'Natural speed' for length: 16.20 kts
Power going to wave formation at top speed: 72 %
Trim: 68
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 189.8 %
Relative accommodation and working space: 57.1 %
(Average = 100%)
Displacement factor: 36 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight / hull surface area: 29 lbs / square foot or 139 Kg / square metre)
Relative longitudinal hull strength: 1.50
(for 11.15 ft / 3.40 m average freeboard, freeboard adjustment 2.31 ft)
Relative composite hull strength: 0.55