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).
Mr. Royce's proposal to test a copper valve guide and umbrella valve to cure self-ignition on the Phantom.
| Identifier | ExFiles\Box 66\2\ scan0201 | |
| Date | 25th June 1926 | |
| To Hs. {Lord Ernest Hives - Chair} from E. {Mr Elliott - Chief Engineer} c. to BJ. BY.2 X.8230 E2/M25.6.26. RE. PHANTOM SELF IGNITION. X.8060 X.699 X.8230 In connection with the experiments to cure self ignition on the Phantom, Mr. Royce proposes that you should test a copper valve guide, also that this guide could be made longer than the present one, and further that it should be tested with an umbrella valve. The idea of using an umbrella valve is to avoid the accumulation of inert gas which occurs in the head of the tulip type. E. {Mr Elliott - Chief Engineer} | ||