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).
Page 2 of a report discussing the properties of steels.
| Identifier | ExFiles\Box 72\1\ scan0183 | |
| Date | 22th February 1924 guessed | |
| contd:- -2- between smaller area of face and our large 40/50. The latter was adopted for the older steels that were very soft when hot. R.{Sir Henry Royce} | ||