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British Rail Class 503
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
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).

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