HMS Dreadnought (BB1905) from Wiki.
HMS Dreadnought was a battleship of the Royal Navy that revolutionised naval power. Her entry into service in 1906 represented such a marked advance in naval technology that her name came to be associated with an entire generation of battleships, the "dreadnoughts", as well as the class of ships named after her. The generation of ships she made obsolete became known as "pre-dreadnoughts". She was the sixth ship of that name in the Royal Navy.
Dreadnought was the first battleship of her era to have a uniform main battery, rather than having a few large guns complemented by a heavy secondary battery of smaller guns. She was also the first capital ship to be powered by steam turbines, making her the fastest battleship in the world at the time of her completion. Her launch helped spark a naval arms race as navies around the world, particularly the German Imperial Navy, rushed to match her in the build-up to World War I.
Dreadnought did not participate in any of World War I's naval battles as she was being refitted during the Battle of Jutland in 1916. This was the only time that British dreadnought battleships fired on their German counterparts during the war. She became the only battleship to sink a submarine when she rammed the SM U-29 when it unexpectedly broke the surface after firing a torpedo at another dreadnought in 1915.[3] She was relegated to coastal defence duties in the English Channel after Jutland, only rejoining the Grand Fleet in 1918. She was reduced to reserve in 1919 and sold for scrap two years later.
HMS Dreadnought, GB Battleships D1905 laid down 1905
Displacement:
15,888 t light; 16,779 t standard; 18,132 t normal; 19,215 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(520.00 ft / 520.00 ft) x 84.00 ft x (29.00 / 30.30 ft)
(158.50 m / 158.50 m) x 25.60 m x (8.84 / 9.24 m)
Armament:
8 - 12.00" / 305 mm 45.0 cal guns - 860.00lbs / 390.09kg shells, 120 per gun
Breech loading guns in turret on barbette mounts, 1903 Model
2 x Twin mounts on centreline, evenly spread
2 x Twin mounts on centreline, aft deck forward
1 raised mount aft - superfiring
10 - 4.70" / 119 mm 45.0 cal guns - 45.00lbs / 20.41kg shells, 200 per gun
Quick firing guns in casemate mounts, 1885 Model
10 x Single mounts on side ends, majority forward
4 - 4.70" / 119 mm 44.0 cal guns - 45.00lbs / 20.41kg shells, 200 per gun
Quick firing guns in deck mounts, 1885 Model
4 x Single mounts on centreline, forward deck aft
4 raised mounts
Weight of broadside 7,510 lbs / 3,406 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11.0" / 279 mm 330.00 ft / 100.58 m 16.00 ft / 4.88 m
Ends: 4.00" / 102 mm 180.00 ft / 54.86 m 10.00 ft / 3.05 m
10.00 ft / 3.05 m Unarmoured ends
Main Belt covers 98 % of normal length
- Torpedo Bulkhead - Strengthened structural bulkheads:
1.00" / 25 mm 350.00 ft / 106.68 m 30.00 ft / 9.14 m
Beam between torpedo bulkheads 64.00 ft / 19.51 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.0" / 305 mm 7.00" / 178 mm 12.0" / 305 mm
2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
3rd: 1.00" / 25 mm - -
- Armoured deck - multiple decks:
For and Aft decks: 3.00" / 76 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm
- Conning towers: Forward 12.00" / 305 mm, Aft 4.00" / 102 mm
Machinery:
Coal and oil fired boilers, steam turbines,
Direct drive, 4 shafts, 25,678 shp / 19,156 Kw = 21.00 kts
Range 6,600nm at 10.00 kts
Bunker at max displacement = 2,436 tons (70% coal)
Complement:
780 - 1,015
Cost:
£1.531 million / $6.124 million
Distribution of weights at normal displacement:
Armament: 1,361 tons, 7.5 %
- Guns: 1,361 tons, 7.5 %
Armour: 6,481 tons, 35.7 %
- Belts: 2,807 tons, 15.5 %
- Torpedo bulkhead: 389 tons, 2.1 %
- Armament: 1,621 tons, 8.9 %
- Armour Deck: 1,428 tons, 7.9 %
- Conning Towers: 238 tons, 1.3 %
Machinery: 2,077 tons, 11.5 %
Hull, fittings & equipment: 5,568 tons, 30.7 %
Fuel, ammunition & stores: 2,244 tons, 12.4 %
Miscellaneous weights: 400 tons, 2.2 %
- On freeboard deck: 200 tons
- Above deck: 200 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
23,316 lbs / 10,576 Kg = 27.0 x 12.0 " / 305 mm shells or 4.2 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 5.0 ft / 1.5 m
Roll period: 15.8 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.50
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.501 / 0.508
Length to Beam Ratio: 6.19 : 1
'Natural speed' for length: 22.80 kts
Power going to wave formation at top speed: 45 %
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 (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 25.00 ft / 7.62 m, 20.00 ft / 6.10 m
- Forward deck: 30.00 %, 20.00 ft / 6.10 m, 15.01 ft / 4.58 m
- Aft deck: 35.00 %, 15.01 ft / 4.58 m, 15.01 ft / 4.58 m
- Quarter deck: 15.00 %, 15.01 ft / 4.58 m, 15.01 ft / 4.58 m
- Average freeboard: 17.16 ft / 5.23 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.0 %
- Above water (accommodation/working, high = better): 115.0 %
Waterplane Area: 29,129 Square feet or 2,706 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 154 lbs/sq ft or 753 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.82
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Adequate 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