Orion, polish torpedo gunboat laid down 1886
Displacement:
675 t light; 697 t standard; 799 t normal; 881 t full load
Dimensions: Length overall / water x beam x draught
207,81 ft / 207,81 ft x 25,82 ft x 10,01 ft (normal load)
63,34 m / 63,34 m x 7,87 m x 3,05 m
Armament:
2 - 3,43" / 87,0 mm guns in single mounts, 18,89lbs / 8,57kg shells, 1886 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 1,46" / 37,0 mm guns in single mounts, 1,45lbs / 0,66kg shells, 1886 Model
Quick firing guns in deck mounts
on side, all amidships
Weight of broadside 44 lbs / 20 kg
Shells per gun, main battery: 200
3 - 18,0" / 457 mm above water torpedoes
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 3 995 ihp / 2 981 Kw = 19,50 kts
Range 2 500nm at 10,00 kts
Bunker at max displacement = 185 tons (100% coal)
Complement:
74 - 97
Cost:
£0,089 million / $0,355 million
Distribution of weights at normal displacement:
Armament: 5 tons, 0,7%
Machinery: 433 tons, 54,1%
Hull, fittings & equipment: 234 tons, 29,3%
Fuel, ammunition & stores: 124 tons, 15,5%
Miscellaneous weights: 3 tons, 0,4%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
255 lbs / 116 Kg = 13,5 x 3,4 " / 87 mm shells or 0,2 torpedoes
Stability (Unstable if below 1.00): 1,57
Metacentric height 1,4 ft / 0,4 m
Roll period: 9,1 seconds
Steadiness - As gun platform (Average = 50 %): 43 %
- Recoil effect (Restricted arc if above 1.00): 0,03
Seaboat quality (Average = 1.00): 0,73
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0,521
Length to Beam Ratio: 8,05 : 1
'Natural speed' for length: 14,42 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -14,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 11,98 ft / 3,65 m
- Forecastle (24%): 10,47 ft / 3,19 m
- Mid (34%): 10,47 ft / 3,19 m (4,49 ft / 1,37 m aft of break)
- Quarterdeck (18%): 5,48 ft / 1,67 m
- Stern: 5,97 ft / 1,82 m
- Average freeboard: 7,14 ft / 2,18 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 180,6%
- Above water (accommodation/working, high = better): 39,8%
Waterplane Area: 3 645 Square feet or 339 Square metres
Displacement factor (Displacement / loading): 50%
Structure weight / hull surface area: 41 lbs/sq ft or 198 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,96
- Longitudinal: 1,46
- Overall: 1,00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is extremely poor
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
Orion (1886)
Talos (1886)