Abstract
The development and performance of British Railways' three prototype Advanced Passenger Trains (APT-Ps) are discussed. The progression from design concept to construction, commissioning and testing prior to entry into passenger service is described. Performance aspects of the train and its sub-systems are assessed in relation to technical objectives.
The commissioning programme and highlights of the track proving trials are described. Important test results are discussed, including those relating to body tilt systems, ride quality, lateral track forces, braking performance, current collection, and thyristor interference. Account is given of various development problems which arose during commissioning trials and endurance running.
The paper concludes with a brief description of the design of the production train (APT-S), which is planned for fleet operation on BR's electrified West Coast routes.
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