Tests on R & D division pantograph on mark 3A overhead equipment Scottish region Nov 1973 (TM-ETR-029)

In order to gain further experience of the performance of the R & DD pantograph and of sagged simple O.H.E. at speeds up to 200 km/h, a series of tests were carried out in Nov 73 on the Scottish Region between Beattock and Lockerbie. These tests were an extension of...