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London North Western Railway:
Midland Railway:
Stratford Midland Junction Railway
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LMS Route: Leamington to Weedon
Southam & Long Itchington Station: lnwrs&l1761
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British Railways Sulzer Type 2 Bo-Bo D5137 is seen at the
head of a Rugby via Marton to Southam cement works freight service on 21st June
1966. The wagons are primarily filled with coal slack and because the train has
to reverse at Marton Junction, a brake van has been provided at each end. The
Derby built Sulzer Type 2 Bo-Bo design later became classified as BR's Class 24
type of diesel locomotives. The Class 24 locomotives were the precursor of the
Class 25 design because after the delivery of the first few Class 24 units it
became apparent that the speed ceiling of 75 mph (121 km/h) was unduly
restrictive and the provision of a bit more power would be advantageous. In the
course of normal development the power output of the Sulzer six-cylinder engine
had been increased to give a continuous traction output of 1,250 bhp (930 kW)
at 750 rpm by the introduction of charge air cooling and the first locomotives
to use this became known as Class 25 locomotives.
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