Riding tests on 4 wheel 15 ft. wheelbase, oil tank wagons (TN-FT-7)

Four wheel, 15ft. (4.58m) wheel base, oil tank wagons with U.I.C. double link and eyebolt suspensions have been shown to be derailment prone in service when running in empty condition at speeds in excess of 64 km/h (40 mile/h) on track containing dipped joints. A riding test conducted on these...