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 valve clearance for a Phantom model with an aluminium head.
| Identifier | ExFiles\Box 8\4\ 04-page093 | |
| Date | 25th June 1928 | |
| To BY.{R.W. Bailey - Chief Engineer} from Hs.{Lord Ernest Hives - Chair} c. to Mx.{John H Maddocks - Chief Proving Officer} X615 Hs{Lord Ernest Hives - Chair}/GWH{George W. Hancock - Head Chateauroux}/LG25.6.28: VALVE CLEARANCE - PHANTOM. X8060 With reference to the valve clearance with aluminium head. Please note these clearances should be .006", when the engine is cold. It is important that the clearance should not be set when engine is hot. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} | ||