British Rail Class 503 | |
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![]() A British Rail Class 503 train on the Liverpool Loop and Link underground system. This train was one of the original batch built by the LMS in 1938. | |
In service | 1938-1985 |
Manufacturer | London, Midland and Scottish Railway, British Railways |
Formation | power car + trailer + driving trailer |
Operator(s) | LMS and British Railways |
Specifications | |
Car length | 58ft 0in |
Width | 9ft 11in |
Height | 11ft 10 1/4in |
Maximum speed | 70mph (110 km/h) |
Weight | Total - 77 tons |
Power output | 4 x 135 hp traction motors total 540 hp (403 kW) |
Electric system(s) | 650V dc third rail |
Track gauge | standard gauge |
British Rail Class 503 trains were 70mph (110km/h) electric multiple units. They were introduced in two batches — in 1938 by the London, Midland and Scottish Railway (LMS) with a further batch (built to a similar design) in 1956 by the then nationalised British Railways (BR).