1919,
Palestro Class
Ships in class;
Palestro, Confienza, San Martino, Solferino
Refitted as coastal escorts 1935
Palestro Class, Italian Destroyer laid down 1919
Displacement:
902 t light; 940 t standard; 1,033 t normal; 1,108 t full load
Dimensions: Length overall / water x beam x draught
268.93 ft / 262.47 ft x 26.25 ft x 13.12 ft (normal load)
81.97 m / 80.00 m x 8.00 m x 4.00 m
Armament:
4 - 3.94" / 100 mm guns (2x2 guns), 30.42lbs / 13.80kg shells, 1919 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
2 - 3.00" / 76.2 mm guns (1x2 guns), 12.00lbs / 5.44kg shells, 1919 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
2 - 0.54" / 13.7 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1919 Model
Machine guns in deck mounts
on side, all forward
Weight of broadside 146 lbs / 66 kg
Shells per gun, main battery: 200
4 - 17.7" / 450 mm above water torpedoes
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 24,190 shp / 18,046 Kw = 32.00 kts
Range 2,500nm at 15.00 kts
Bunker at max displacement = 168 tons
Complement:
90 - 118
Cost:
£0.266 million / $1.063 million
Distribution of weights at normal displacement:
Armament: 19 tons, 1.8 %
Machinery: 533 tons, 51.6 %
Hull, fittings & equipment: 331 tons, 32.0 %
Fuel, ammunition & stores: 131 tons, 12.7 %
Miscellaneous weights: 20 tons, 1.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
286 lbs / 130 Kg = 9.4 x 3.9 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 0.9 ft / 0.3 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 76 %
- Recoil effect (Restricted arc if above 1.00): 0.38
Seaboat quality (Average = 1.00): 1.09
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 18.74 kts
Power going to wave formation at top speed: 71 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 18.04 ft / 5.50 m
- Mid (50 %): 18.04 ft / 5.50 m (9.84 ft / 3.00 m aft of break)
- Quarterdeck (15 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 13.94 ft / 4.25 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 182.8 %
- Above water (accommodation/working, high = better): 90.8 %
Waterplane Area: 4,401 Square feet or 409 Square metres
Displacement factor (Displacement / loading): 55 %
Structure weight / hull surface area: 30 lbs/sq ft or 147 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.52
- Longitudinal: 4.92
- Overall: 0.65
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
Palestro Class, Italian Destroyer laid down 1919, refitted 1935
Displacement:
906 t light; 940 t standard; 1,033 t normal; 1,108 t full load
Dimensions: Length overall / water x beam x draught
268.93 ft / 262.47 ft x 26.25 ft x 13.12 ft (normal load)
81.97 m / 80.00 m x 8.00 m x 4.00 m
Armament:
2 - 3.94" / 100 mm guns (1x2 guns), 30.42lbs / 13.80kg shells, 1919 Model
Breech loading guns in deck mount
on centreline forward
8 - 1.85" / 47.0 mm guns (2x4 guns), 3.86lbs / 1.75kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on centreline, all aft, 1 raised mount - superfiring
12 - 0.98" / 25.0 mm guns in single mounts, 0.55lbs / 0.25kg shells, 1919 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 98 lbs / 45 kg
Shells per gun, main battery: 200
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
2nd: 0.39" / 10 mm 0.39" / 10 mm -
- Conning tower: 1.42" / 36 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 24,190 shp / 18,046 Kw = 32.00 kts
Range 2,500nm at 15.00 kts
Bunker at max displacement = 168 tons
Complement:
90 - 118
Cost:
£0.256 million / $1.024 million
Distribution of weights at normal displacement:
Armament: 12 tons, 1.1 %
Armour: 5 tons, 0.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 2 tons, 0.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.3 %
Machinery: 542 tons, 52.5 %
Hull, fittings & equipment: 317 tons, 30.7 %
Fuel, ammunition & stores: 127 tons, 12.3 %
Miscellaneous weights: 30 tons, 2.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
284 lbs / 129 Kg = 9.3 x 3.9 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 0.9 ft / 0.3 m
Roll period: 11.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 1.08
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 18.74 kts
Power going to wave formation at top speed: 71 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 18.04 ft / 5.50 m
- Mid (50 %): 18.04 ft / 5.50 m (9.84 ft / 3.00 m aft of break)
- Quarterdeck (15 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 13.94 ft / 4.25 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 181.7 %
- Above water (accommodation/working, high = better): 126.9 %
Waterplane Area: 4,401 Square feet or 409 Square metres
Displacement factor (Displacement / loading): 56 %
Structure weight / hull surface area: 29 lbs/sq ft or 140 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 4.63
- Overall: 0.63
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
10tons = D3 sonar
20tons = depth charges