Super Swift, Great Britain Scout Cruiser laid down 1912 (Engine 1950) Displacement: 2,225 t light; 2,291 t standard; 2,445 t normal; 2,568 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (380.73 ft / 378.00 ft) x 37.00 ft x (13.75 / 14.24 ft) (116.05 m / 115.21 m) x 11.28 m x (4.19 / 4.34 m) Armament: 6 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun Quick firing guns in deck and hoist mounts, 1912 Model 2 x Single mounts on centreline ends, evenly spread 4 x Single mounts on sides, forward deck aft Weight of broadside 203 lbs / 92 kg Main Torpedoes 2 - 18.0" / 457 mm, 21.00 ft / 6.40 m torpedoes - 0.905 t each, 1.810 t total In 2 sets of deck mounted centre rotating tubes Armour: - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 1.00" / 25 mm 1.00" / 25 mm 1.00" / 25 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 2 shafts, 78,440 shp / 58,517 Kw = 37.00 kts Range 3,750nm at 14.00 kts Bunker at max displacement = 277 tons Complement: 173 - 226 Cost: £0.304 million / $1.216 million Distribution of weights at normal displacement: Armament: 66 tons, 2.7 % - Guns: 62 tons, 2.6 % - Weapons: 4 tons, 0.1 % Armour: 37 tons, 1.5 % - Armament: 37 tons, 1.5 % Machinery: 1,460 tons, 59.7 % Hull, fittings & equipment: 662 tons, 27.1 % Fuel, ammunition & stores: 220 tons, 9.0 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 510 lbs / 232 Kg = 15.9 x 4.0 " / 102 mm shells or 0.4 torpedoes Stability (Unstable if below 1.00): 1.31 Metacentric height 1.8 ft / 0.6 m Roll period: 11.5 seconds Steadiness - As gun platform (Average = 50 %): 51 % - Recoil effect (Restricted arc if above 1.00): 0.26 Seaboat quality (Average = 1.00): 1.02 Hull form characteristics: Hull has rise forward of midbreak, a normal bow and a round stern Block coefficient (normal/deep): 0.445 / 0.451 Length to Beam Ratio: 10.22 : 1 'Natural speed' for length: 19.44 kts Power going to wave formation at top speed: 71 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 6.00 degrees Stern overhang: 0.00 ft / 0.00 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 16.00 %, 26.00 ft / 7.92 m, 24.00 ft / 7.32 m - Forward deck: 18.00 %, 24.00 ft / 7.32 m, 24.00 ft / 7.32 m - Aft deck: 51.00 %, 16.00 ft / 4.88 m, 16.00 ft / 4.88 m - Quarter deck: 15.00 %, 16.00 ft / 4.88 m, 16.00 ft / 4.88 m - Average freeboard: 18.85 ft / 5.74 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 200.6 % - Above water (accommodation/working, high = better): 145.1 % Waterplane Area: 8,885 Square feet or 825 Square metres Displacement factor (Displacement / loading): 61 % Structure weight / hull surface area: 34 lbs/sq ft or 167 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.42 - Longitudinal: 2.79 - Overall: 0.51 Extremely poor machinery, storage, compartmentation space Excellent accommodation and workspace room
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Monday, May 12, 2008
I am a bit disappointed with the latest Springsharp beta
The latest Springsharp beta still does not allow me to have higher power output machinery. As far back as a 1905 design (HMS Swift), the British were able to achieve a 60 SHP/ton of machinery weight propulsion plant. Admittedly, that was with the machinery being stressed, but I do not believe overly so. I cannot find a way to do better than 50 SHP/ton and I believe that the power required is too great for the size of ship. All you have to do is consult a Conways and look at the British Tribal class destroyerss bujild from 1937 and later. For a nominal 44,000 SHP, the could reach a nominal speed of 36.25 to 36.5 knots. For a comparably-sized ship, Springsharp requires an absurd 78,440 SHP to reach 37 knots. This is the Springsharp report:
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