I had some spare materiel so I decided to build some more destroyers, they're always useful.
A small improvement over the previous
Soldati class of 18 ships taking into account some of the design work done on the large
Impavido-class destroyers and recent developments (Soldati is a 1931 design).
The armament is rearranged to give equal firepower fore and aft. 4x130/45 SP guns are carried as normal. AA armament comprises of ten duple 25mm mountings giving a considerable rise in close-range firepower. Madsen 57mm mountings are being trialled on one of the ships (pictured).
The powerplant is laid out differently, again returning to the unit principle with B-E-B-E to improve protection.
4 examples to be laid down. As yet unnamed.
Cacciatorpediniere, laid down 1934
Displacement:
1,583 t light; 1,675 t standard; 1,953 t normal; 2,176 t full load
Dimensions: Length overall / water x beam x draught
373.73 ft / 360.89 ft x 36.09 ft x 13.12 ft (normal load)
113.91 m / 110.00 m x 11.00 m x 4.00 m
Armament:
4 - 5.31" / 135 mm guns (2x2 guns), 70.55lbs / 32.00kg shells, 1934 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 1 raised mount
2 - 2.24" / 57.0 mm guns in single mounts, 5.51lbs / 2.50kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, all amidships
20 - 0.98" / 25.0 mm guns (10x2 guns), 0.55lbs / 0.25kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 304 lbs / 138 kg
Shells per gun, main battery: 300
4 - 23.6" / 600 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.42" / 36 mm 0.79" / 20 mm -
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -
- Conning tower: 1.42" / 36 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 34,000 shp / 25,364 Kw = 32.85 kts
Range 3,200nm at 20.00 kts
Bunker at max displacement = 500 tons
Complement:
146 - 190
Cost:
£1.036 million / $4.143 million
Distribution of weights at normal displacement:
Armament: 40 tons, 2.1 %
Armour: 22 tons, 1.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 17 tons, 0.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 5 tons, 0.2 %
Machinery: 871 tons, 44.6 %
Hull, fittings & equipment: 585 tons, 29.9 %
Fuel, ammunition & stores: 370 tons, 19.0 %
Miscellaneous weights: 66 tons, 3.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
655 lbs / 297 Kg = 8.7 x 5.3 " / 135 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 1.8 ft / 0.6 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.38
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 21.97 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (10 %): 21.33 ft / 6.50 m (18.04 ft / 5.50 m aft of break)
- Mid (45 %): 18.04 ft / 5.50 m (11.48 ft / 3.50 m aft of break)
- Quarterdeck (10 %): 11.48 ft / 3.50 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 14.96 ft / 4.56 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 164.9 %
- Above water (accommodation/working, high = better): 114.1 %
Waterplane Area: 8,320 Square feet or 773 Square metres
Displacement factor (Displacement / loading): 83 %
Structure weight / hull surface area: 37 lbs/sq ft or 183 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.76
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
10t = 2 x 57mm mounts
24t = 8 x 600mm TT
7t = Scaricabombe
9t= SONAR
16t = ASW mortar + reloads
=66t
150x28kg HE Shells
150x36kg SAP Shells