Gas turbine locomotive turbine locomotive to be used on British Railways. The locomotive was to be built by the North British Locomotive Company and the turbine would be supplied by C. A. Parsons and Company. According to Sampson, the plan was to use indirect heating. The pulverized coal would be burned in a combustion chamber and the hot gases passed to a heat exchanger. Here, the heat would be transferred to a separate body of compressed air which would power the turbine. Essentially, it would have been a hot air engine using a turbine instead of a piston. Robertson shows a diagram which
Gas turbine locomotive 18000 and 18100, were ordered by the Great Western Railway but completed for the newly nationalised British Railways. 18000 was built by Brown Boveri and delivered in 1949. It was a 1840 kW (2470 hp) GTEL, ordered by the GWR and used for express passenger services. 18100 was built by Metropolitan-Vickers and delivered in 1951. It had an aircraft-type gas turbine of . Maximum speed was . A third locomotive, the GT3, was constructed in 1961. Although built by English Electric, who had pioneered electric transmission with LMS 10000 locomotives, this used a turbine-mechanical transmission. The British Rail APT-E, prototype