Wisła, polish river monitor laid down 1867
Displacement:
128 t light; 133 t standard; 135 t normal; 136 t full load
Dimensions: Length overall / water x beam x draught
114,90 ft / 114,90 ft x 22,67 ft x 2,53 ft (normal load)
35,02 m / 35,02 m x 6,91 m x 0,77 m
Armament:
2 - 32pdr guns in single mounts, 32lbs / 14,52kg shells, 1867 Model
Smoothbore guns in Coles/Ericsson turrets
on centreline ends, evenly spread
Weight of broadside 64 lbs / 29 kg
Shells per gun, main battery: 80
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,18" / 30 mm 0,79" / 20 mm -
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 31 ihp / 23 Kw = 6,00 kts
Range 300nm at 4,00 kts
Bunker at max displacement = 4 tons (100% coal)
Complement:
19 - 25
Cost:
£0,011 million / $0,045 million
Distribution of weights at normal displacement:
Armament: 7 tons, 4,9%
Armour: 6 tons, 4,3%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 6 tons, 4,3%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 8 tons, 6,0%
Hull, fittings & equipment: 107 tons, 79,5%
Fuel, ammunition & stores: 7 tons, 5,3%
Miscellaneous weights: 0 tons, 0,0%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
243 lbs / 110 Kg = 9,1 x 4,3 " / 110 mm shells or 0,4 torpedoes
Stability (Unstable if below 1.00): 1,51
Metacentric height 1,1 ft / 0,3 m
Roll period: 9,1 seconds
Steadiness - As gun platform (Average = 50 %): 34 %
- Recoil effect (Restricted arc if above 1.00): 0,12
Seaboat quality (Average = 1.00): 0,46
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,716
Length to Beam Ratio: 5,07 : 1
'Natural speed' for length: 10,72 kts
Power going to wave formation at top speed: 19 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 3,48 ft / 1,06 m
- Forecastle (21%): 3,48 ft / 1,06 m
- Mid (50%): 3,48 ft / 1,06 m
- Quarterdeck (19%): 3,48 ft / 1,06 m
- Stern: 2,49 ft / 0,76 m
- Average freeboard: 3,39 ft / 1,03 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 56,9%
- Above water (accommodation/working, high = better): 73,5%
Waterplane Area: 2 108 Square feet or 196 Square metres
Displacement factor (Displacement / loading): 179%
Structure weight / hull surface area: 46 lbs/sq ft or 223 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1,00
- Longitudinal: 1,09
- Overall: 1,00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Caution: Lacks seaworthiness - very limited seakeeping ability
Wisła (1867)
Bug (1867)
Niemen (1868)
Wilia (1868)
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