Połtawa, russian battleship laid down 1870 (Engine 1872)
Displacement:
5 131 t light; 5 522 t standard; 5 714 t normal; 5 867 t full load
Dimensions: Length overall / water x beam x draught
280,84 ft / 280,84 ft x 58,07 ft x 21,33 ft (normal load)
85,60 m / 85,60 m x 17,70 m x 6,50 m
Armament:
4 - 10,00" / 254 mm guns in single mounts, 350,00lbs / 158,76kg shells, 1870 Model
Breech loading guns in casemate mounts
on side, all amidships
4 guns in hull casemates - Limited use in all but light seas
6 - 9,02" / 229 mm guns in single mounts, 256,49lbs / 116,34kg shells, 1870 Model
Breech loading guns in casemate mounts
on side, all amidships
6 guns in hull casemates - Limited use in all but light seas
4 - 1,46" / 37,0 mm guns in single mounts, 1,08lbs / 0,49kg shells, 1870 Model
Breech loading guns in deck mounts
on side ends, evenly spread
Weight of broadside 2 943 lbs / 1 335 kg
Shells per gun, main battery: 160
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9,02" / 229 mm 229,66 ft / 70,00 m 14,11 ft / 4,30 m
Ends: 6,30" / 160 mm 49,21 ft / 15,00 m 13,12 ft / 4,00 m
1,97 ft / 0,60 m Unarmoured ends
Main Belt covers 126% of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7,99" / 203 mm - -
2nd: 7,99" / 203 mm - -
- Armour deck: 1,38" / 35 mm, Conning tower: 9,65" / 245 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 2 239 ihp / 1 671 Kw = 12,00 kts
Range 2 500nm at 6,00 kts
Bunker at max displacement = 345 tons (100% coal)
Complement:
625 (full sails)
Cost:
£0,562 million / $2,250 million
Distribution of weights at normal displacement:
Armament: 368 tons, 6,4%
Armour: 2 216 tons, 38,8%
- Belts: 1 379 tons, 24,1%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 481 tons, 8,4%
- Armour Deck: 289 tons, 5,1%
- Conning Tower: 66 tons, 1,2%
Machinery: 527 tons, 9,2%
Hull, fittings & equipment: 2 020 tons, 35,3%
Fuel, ammunition & stores: 583 tons, 10,2%
Miscellaneous weights: 0 tons, 0,0%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5 628 lbs / 2 553 Kg = 16,1 x 10,0 " / 254 mm shells or 1,0 torpedoes
Stability (Unstable if below 1.00): 1,62
Metacentric height 5,0 ft / 1,5 m
Roll period: 11,0 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0,24
Seaboat quality (Average = 1.00): 2,00
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,575
Length to Beam Ratio: 4,84 : 1
'Natural speed' for length: 16,76 kts
Power going to wave formation at top speed: 37 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -12,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 15,75 ft / 4,80 m
- Forecastle (20%): 13,78 ft / 4,20 m
- Mid (50%): 13,78 ft / 4,20 m
- Quarterdeck (15%): 13,78 ft / 4,20 m
- Stern: 13,78 ft / 4,20 m
- Average freeboard: 13,94 ft / 4,25 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 80,6%
- Above water (accommodation/working, high = better): 90,8%
Waterplane Area: 11 349 Square feet or 1 054 Square metres
Displacement factor (Displacement / loading): 92%
Structure weight / hull surface area: 117 lbs/sq ft or 570 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,89
- Longitudinal: 2,89
- Overall: 1,00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
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