Scale line testing of Mk IV High Speed Overhead Line Equipment (TM-ETR-68)

Mk IV Overhead Equipment (O/H/E) was designed for initial 250 km/h running with an eventual capability up to 300 km/h. Testing was to be carried out at full speed on a specially constructed 8 km test section on the Western Region between Brinkworth and Hullavington. Initial tests were conducted on...