Tests on neutral sections and high speed section insulator using the MK I APT pantograph (Wigan - Lancaster, unenergised line, May 1976) (TM-ETR-078)

Dead line testing of the APT Pantograph to 160 km/h over the High Speed Section Insulator and the modified and original versions of the Neutral Section highlights that the insulator protecting skids could he a potential damaging hazard to pantograph carbons when speeds are increased, At speeds up to...