A.P.T.-E suspension/braking development programme (notes on meeting with H.S.D. at Derby on 17 Sep 69) (IM-DA-015)

1.1 British Railways explained that the development programme for A.P.T.-E. only was being considered at this time, and that discussion would be limited to this train. The life requirement for the experimental suspension and braking systems is therefore 500 hours (80,000 km); this constitutes a fatigue case for wheelsets...