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Parnu class, Russian Destroyer laid down 1929
Displacement:
1,143 t light; 1,199 t standard; 1,343 t normal; 1,457 t full load
Dimensions: Length overall / water x beam x
draught
344.49 ft / 344.49 ft x 31.50 ft x 10.83 ft (normal load)
105.00 m / 105.00 m x 9.60 m x 3.30 m
Armament:
3 - 5.12" / 130 mm guns in single mounts, 81.57lbs / 37.00kg shells, 1929 Model
Breech loading guns in deck mounts
with hoists
on centreline ends, majority forward, 1 raised mount
4 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs
/ 0.70kg shells, 1929 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1929 Model
Machine
guns in deck mounts
on side, evenly spread
Weight of broadside 250 lbs / 114 kg
Shells per gun, main battery:
200
8 - 21.0" / 533 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist
(max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -
- Conning tower: 1.18" / 30 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 29,027 shp / 21,654 Kw = 32.00 kts
Range
3,600nm at 15.00 kts
Bunker at max displacement = 257 tons
Complement:
110 - 144
Cost:
£0.621
million / $2.484 million
Distribution of weights at normal displacement:
Armament: 27 tons, 2.0 %
Armour:
10 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 0.5 %
- Armour
Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 658 tons, 49.0 %
Hull, fittings & equipment:
428 tons, 31.9 %
Fuel, ammunition & stores: 199 tons, 14.8 %
Miscellaneous weights: 20 tons, 1.5 %
Overall
survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
367 lbs /
166 Kg = 5.5 x 5.1 " / 130 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height
1.2 ft / 0.4 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted
arc if above 1.00): 0.62
Seaboat quality (Average = 1.00): 1.06
Hull form characteristics:
Hull has rise forward
of midbreak
Block coefficient: 0.400
Length to Beam Ratio: 10.94 : 1
'Natural speed' for length: 18.56 kts
Power
going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive
= bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage
of overall length):
- Stem: 21.00 ft / 6.40 m
- Forecastle (20 %): 16.40 ft / 5.00 m
- Mid (50 %): 16.40 ft /
5.00 m (9.35 ft / 2.85 m aft of break)
- Quarterdeck (15 %): 9.35 ft / 2.85 m
- Stern: 10.83 ft / 3.30 m
- Average
freeboard: 13.36 ft / 4.07 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low
= better): 176.4 %
- Above water (accommodation/working, high = better): 71.8 %
Waterplane Area: 6,679 Square feet
or 620 Square metres
Displacement factor (Displacement / loading): 66 %
Structure weight / hull surface area: 33 lbs/sq
ft or 161 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.59
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship
has slow, easy roll, a good, steady gun platform
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