Hot axleboxes on sleeping cars with Maddison (D.U. Mark II.A) bogies (TN-DYN-029)

Early in 1965 the Research Department, was made aware of some troubles with hot axleboxes on the London Midland Region sleeping cars. On investigation, it became obvious that the bogies were running at temperatures about 90°F. more than would have been expected and that the trouble was largely confined to...