From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
New ribbed brake drums made from tubular forgings and the potential use of manganese steel.
| Identifier | ExFiles\Box 120\1\ scan0028 | |
| Date | 1st December 1930 | |
| X4612 BY.{R.W. Bailey - Chief Engineer} FROM DA.{Bernard Day - Chassis Design} C. to SG.{Arthur F. Sidgreaves - MD} HS.{Lord Ernest Hives - Chair} BRAKE DRUMS. DA{Bernard Day - Chassis Design}1/ML.12.30. We sent you on Saturday the 29th. ult., drawings of N. schemes 3176/7., shewing the new ribbed brake drums turned out of tube or tubular forgings. It is intended to try manganese steel unless something still more suitable is known. DA.{Bernard Day - Chassis Design} | ||