Continuous brakes for freight trains.16-ton A.V.B. mineral wagons. 'D.A./O' vacuum brake tests, July and August, 1954 (E-117)

As part of the programme for developing the most suitable continuous brake for freight trains running to Class "C" timings, a series of vacuum brake tests has been made on a train of 16-ton mineral wagons, the results of earlier tests being given to the Ideal Stocks Committee in April...