MR electric units
The Midland Railway experimented with electrification on its Heysham-Morecambe-Lancaster line. Electric trains started to run over this route in 1908, using the overhead 6.6 kV AC electric supply installed and generated at the MR's own power station in Heysham. The electric trains consisted of three driving motor coaches and six driving trailer coaches. Since the DM cars had a cab at each end, this allowed trains of one, two, or three cars to be formed.
Driving Motors
The three DM cars were built by the MR at their Derby Works and were 60 feet (18 m) in length. Two had Siemens electrical equipment fitted, while the third had Westinghouse equipment.
Driving Trailers
Of the six DT cars, four were built new by the MR at their Derby works, while the other two were converted from existing hauled stock compartment coaches. In February 1951, these venerable units were finally withdrawn from service. Steam locomotive-hauled trains operated passenger services over the Morecambe Branch Line from then until August 1953, when electric trains took over again, this time the prototype 25 kV AC Class AM1 units following the installation of the appropriate new equipment.
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