Rapido Trains Dynamometer Car No. E902502 - BR Livery Post 1949

Rapido Trains Dynamometer Car No. E902502 - BR Livery Post 1949

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A Dynamometer Car scientifically measures the performance of locomotives in order to effect improvements. Inside, instruments measure the speed, power and other statistics of locomotive performance, many of which were applied to a paper trace operated mechanically from the movement of the vehicle.

Best known as the vehicle that recorded the 126mph run of LNER ‘A4’ No. 4468 Mallard  on July 3 1938, the North Eastern Railway’s test car, built at Darlington Works in 1906, is now on display at the National Railway Museum, where it has been reunited with Mallard.

No. E902502 in British Railways faux teak finish with BR Gill Sans lettering. This livery was applied in 1949 and can be seen when the Dynamometer Car was used on trials with Bulleid’s famous ‘Leader’ locomotive.