First up is the rebuild of the ex-Italian
Leone class contradestroyers.
-Old Low-Angle 5.12'' guns replaced with new, more modern DP semi-automatic weapons based on the Russian design
-Superstructure rebuilt to allow for higher speeds with no reduced preformance
-Speed increased by 1 knot, to 35.5 knots, with the replacement of the 20 year old engines by newer models
-Torpedo tubes upgraded to the large, Russian 65 cm torpedo tubes
-Magazine space doubled, more ASW weapons and Fire Control is added
Leone, Latvia Contradestroyer laid down 1917 (Engine 1939)
Displacement:
2,393 t light; 2,536 t standard; 2,695 t normal; 2,823 t full load
Dimensions: Length overall / water x beam x draught
405.72 ft / 393.70 ft x 39.70 ft x 15.09 ft (normal load)
123.66 m / 120.00 m x 12.10 m x 4.60 m
Armament:
6 - 5.12" / 130 mm guns (3x2 guns), 67.11lbs / 30.44kg shells, 1940 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, majority aft, 1 raised mount aft - superfiring
2 - 5.12" / 130 mm guns (1x2 guns), 67.11lbs / 30.44kg shells, 1940 Model
Automatic rapid fire guns in a deck mount with hoist
on centreline amidships
4 - 1.46" / 37.1 mm guns (1x4 guns), 0.00lbs / 0.00kg shells, 1939 Model
Anti-aircraft guns in a deck mount with hoist
on centreline forward, all raised guns
8 - 1.46" / 37.1 mm guns (4x2 guns), 1.56lbs / 0.71kg shells, 1939 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
Weight of broadside 549 lbs / 249 kg
Shells per gun, main battery: 275
4 - 21.7" / 551.18 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.50" / 38 mm 5.00" / 127 mm
2nd: 2.00" / 51 mm 1.50" / 38 mm 5.00" / 127 mm
3rd: - - 1.00" / 25 mm
- Conning tower: 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 55,000 shp / 41,030 Kw = 35.50 kts
Range 3,000nm at 15.00 kts
Bunker at max displacement = 287 tons
Complement:
186 - 243
Cost:
£0.604 million / $2.416 million
Distribution of weights at normal displacement:
Armament: 83 tons, 3.1 %
Armour: 65 tons, 2.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 54 tons, 2.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 12 tons, 0.4 %
Machinery: 1,277 tons, 47.4 %
Hull, fittings & equipment: 917 tons, 34.0 %
Fuel, ammunition & stores: 303 tons, 11.2 %
Miscellaneous weights: 50 tons, 1.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
753 lbs / 342 Kg = 11.2 x 5.1 " / 130 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 1.7 ft / 0.5 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 9.92 : 1
'Natural speed' for length: 22.97 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 24.00 ft / 7.32 m
- Forecastle (20 %): 18.00 ft / 5.49 m
- Mid (50 %): 18.00 ft / 5.49 m (17.00 ft / 5.18 m aft of break)
- Quarterdeck (15 %): 17.00 ft / 5.18 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 17.91 ft / 5.46 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 179.8 %
- Above water (accommodation/working, high = better): 144.9 %
Waterplane Area: 9,985 Square feet or 928 Square metres
Displacement factor (Displacement / loading): 72 %
Structure weight / hull surface area: 45 lbs/sq ft or 221 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.39
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent