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).
Engine detonation in a 'Big Bore Bentley'.
| Identifier | ExFiles\Box 90\1\ Scan174 | |
| Date | 22th November 1935 | |
| x763 S/W To Rm.{William Robotham - Chief Engineer} from Sg.{Arthur F. Sidgreaves - MD} Re Big Bore Bentley. Sg{Arthur F. Sidgreaves - MD}12/E22.11.35 You will remember that I said that, when I first drove it and used Ethyl only, it detonated very noticeably. The curious phenomenon is that, although since then we have put in nothing but ordinary petrol, it has entirely ceased to detonate since the Brooklands test. I was wondering whether you could account for this. Sg.{Arthur F. Sidgreaves - MD} | ||