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).
Fault of the Phantom engine running backwards when being switched off, which has been traced to the exhaust valves.
| Identifier | ExFiles\Box 66\2\ scan0263 | |
| Date | 11th November 1926 | |
| To CWB. from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} X8230 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}4/LG4.11.26. PHANTOM ENGINE RUNNING BACKWARDS WHEN SWITCHING OFF. X699 With reference to CWB13/GM3.11.26. We have, as you state, traced the trouble of the engine running backwards after switching off, to the exhaust valves. Tests are still being carried out with a view to eliminating the trouble. We have as yet nothing which we can fit to a car. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||