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LNER Class A4
|LNER Class A4|
|60009 Union of South Africa in 1951|
|Designer||H. N. Gresley|
|Builder||LNER Doncaster Works|
|Gauge||Lua error in package.lua at line 80: module 'Module:Track gauge/data' not found.|
|Leading wheel diameter||3 ft 2 in (0.965 m)|
|Driver diameter||6 ft 8 in (2.032 m)|
|Trailing wheel diameter||3 ft 8 in (1.118 m)|
|Locomotive weight||102 tons 19 cwt (230,600 lb or 104.6 t)|
|Locomotive and tender combined weight||167 tons 2 cwt (374,300 lb or 169.8 t)|
|Fuel capacity||8 tons 0 cwt (17,900 lb or 8.1 t)|
|Water capacity||5,000 imperial gallons (23,000 l; 6,000 US gal)|
|Boiler pressure||250 psi (1.72 MPa)|
|Cylinder size||18.5 × 26 in (470 × 660 mm)|
|Tractive effort||35,455 lbf (157.71 kN)|
|Train brakes|| Vacuum|
60009, 60007 & 60019 have been fitted with air brakes
|Power class||BR: 8P6F|
|Number in class||35|
They were designed to be very fast and had a very sleek shape. One of them, 4468 "Mallard", is the fastest steam locomotive ever made. It set a world speed record of 125 mph (201.16 km/h) on July 3, 1938.
Six A4s still exist today. The rest were scrapped when steam stopped being used to power trains in Britain.
- Fox, Peter; Hall, Peter & Pritchard, Robert (2007). Preserved Locomotives of British Railways (Twelfth edition). Platform 5, Sheffield. .