Breaking the line of destroyers I was inspired by the russian comment above and to draw the steam corvette Svensksund. Named after Sweden's equilant to Trafalgar - the victory over the russian archipelago fleet at
Svensksund 9 july 1790.
Svensksund,
Sweden
Steamcorvette laid down 1866
Armoured Frigate (Broadside ironclad)
Displacement:
2 188 t light; 2 454 t standard; 2 500 t normal; 2 537 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(213,25 ft / 196,85 ft) x 45,93 ft x (16,40 / 16,61 ft)
(65,00 m / 60,00 m) x 14,00 m x (5,00 / 5,06 m)
Armament:
12 - 7,87" / 200 mm 25,0 cal guns - 177,36lbs / 80,45kg shells, 150 per gun
Muzzle loading guns in broadside mounts, 1866 Model
12 x Single mounts on sides, evenly spread
12 hull mounts on upper deck- Limited use in any sea
12 - 4,72" / 120 mm 25,0 cal guns - 38,32lbs / 17,38kg shells, 150 per gun
Muzzle loading guns in broadside mounts, 1866 Model
12 x Single mounts on side ends, evenly spread
12 hull mounts on upper deck- Limited use in any sea
20 - 0,98" / 25,0 mm 20,0 cal guns - 0,33lbs / 0,15kg shells, 150 per gun
Quick firing guns in deck mounts, 1866 Model
5 x 2 row decuple mounts on side ends, majority forward
Weight of broadside 2 595 lbs / 1 177 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7,87" / 200 mm 118,11 ft / 36,00 m 8,14 ft / 2,48 m
Ends: 1,97" / 50 mm 78,71 ft / 23,99 m 8,14 ft / 2,48 m
Upper: 1,97" / 50 mm 118,11 ft / 36,00 m 8,01 ft / 2,44 m
Main Belt covers 92 % of normal length
- Hull void:
0,00" / 0 mm 0,00 ft / 0,00 m 0,00 ft / 0,00 m
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 793 ihp / 592 Kw = 10,00 kts
Range 1 000nm at 5,00 kts
Bunker at max displacement = 83 tons (100% coal)
Complement:
176 - 229
Cost:
£0,174 million / $0,698 million
Distribution of weights at normal displacement:
Armament: 185 tons, 7,4 %
- Guns: 185 tons, 7,4 %
Armour: 499 tons, 20,0 %
- Belts: 499 tons, 20,0 %
Machinery: 213 tons, 8,5 %
Hull, fittings & equipment: 831 tons, 33,2 %
Fuel, ammunition & stores: 312 tons, 12,5 %
Miscellaneous weights: 460 tons, 18,4 %
- Hull below water: 50 tons
- Hull void weights: 10 tons
- Hull above water: 50 tons
- On freeboard deck: 200 tons
- Above deck: 150 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2 661 lbs / 1 207 Kg = 17,0 x 7,9 " / 200 mm shells or 1,3 torpedoes
Stability (Unstable if below 1.00): 1,34
Metacentric height 2,6 ft / 0,8 m
Roll period: 11,9 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0,17
Seaboat quality (Average = 1.00): 2,00
Hull form characteristics:
Hull has raised forecastle, raised quarterdeck ,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0,590 / 0,591
Length to Beam Ratio: 4,29 : 1
'Natural speed' for length: 14,03 kts
Power going to wave formation at top speed: 38 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -10,00 degrees
Stern overhang: 13,12 ft / 4,00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20,00 %, 13,12 ft / 4,00 m, 13,12 ft / 4,00 m
- Forward deck: 30,00 %, 9,84 ft / 3,00 m, 9,84 ft / 3,00 m
- Aft deck: 30,00 %, 9,84 ft / 3,00 m, 9,84 ft / 3,00 m
- Quarter deck: 20,00 %, 16,40 ft / 5,00 m, 16,40 ft / 5,00 m
- Average freeboard: 11,81 ft / 3,60 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 64,8 %
- Above water (accommodation/working, high = better): 68,1 %
Waterplane Area: 6 398 Square feet or 594 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 96 lbs/sq ft or 467 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,98
- Longitudinal: 4,21
- Overall: 1,13
Excellent machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather