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).
Requesting a special battery ignition cam for 23-EX be hardened by the 'cloudburst' process.
| Identifier | ExFiles\Box 65\1\ scan0233 | |
| Date | 28th January 1930 | |
| X-7680 RHC.{R. H. Coverley - Production Engineer} from EFC. c. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} EFC4/AD28.1.30. X.7680. BATTERY IGNITION CAM FOR 23-EX. Will you please arrange for this to be one of the special cams handed to you, hardened by "cloudburst" process. EFC. HEW. | ||