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).
Notice regarding the new designation for chemically treated clutch linings.
| Identifier | ExFiles\Box 141\3\ scan0263 | |
| Date | 20th March 1934 | |
| RHC.{R. H. Coverley - Production Engineer} X719 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}12/KW.20.3.34. Clutch Linings. Will you please note that the chemically treated linings in RAD.11 material have been designated by Ferodos S.4628, and the linings in the Stores to this latter number are therefore suitable for all cars. Hs{Lord Ernest Hives - Chair}/H.Grylls. | ||