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).
Receipt and testing of experimental Silico-Manganese steel road spring plates from Messrs. Woodhead & Sons.
| Identifier | ExFiles\Box 42\3\ Scan151 | |
| Date | 4th February 1924 | |
| To Hs.{Lord Ernest Hives - Chair} X3854 BY/EM2/ML4.2.24. RE ROAD SPRINGS. Please receive herewith 4 Experimental main plates (painted red) ex Messrs. Woodhead & Sons. These are made from Silico-Manganese steel and have been heat treated to give a brinell of 363. BY.{R.W. Bailey - Chief Engineer} suggests that these should be tested in parallel with the Silicon Chrome Main plates of the same brinell hardness which we handed to you a few days ago. BY/EM | ||