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).
The ignition and spark plug types for the 20/25 model.
| Identifier | ExFiles\Box 54\5\ Scan375 | |
| Date | 22th April 1932 | |
| X6095 S/W To Hs.{Lord Ernest Hives - Chair} from Sg.{Arthur F. Sidgreaves - MD} re 20/25 Ignition. Sg{Arthur F. Sidgreaves - MD}3/E22.4.32 Referring to R2/M14.4.32 I meant to have asked you yesterday but forgot, how it was that the plugs on R's car were of the single point type as I understand that the plugs we use as standard have three points? Doubtless you will be writing to R.{Sir Henry Royce} on this subject. Sg.{Arthur F. Sidgreaves - MD} | ||