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).
Modification notice for the Phantom III valve gear, concerning valve guides, washers, and springs.
| Identifier | ExFiles\Box 96\2\ scan0188 | |
| Date | 17th December 1936 | |
| To HY.{Tom Haldenby - Plant Engineer} Copy to WHS. Rm.{William Robotham - Chief Engineer} Des. Pay/Cost. 354. E/PSN.4/MN.17.12.36. Phantom III Valve Gear. We send you herewith LoC.5432 of a modification to the valve guides on Phantom III, to use the same top washer on all our engines with the new valve springs to LoC.5417. This modification is only suitable for use without hydraulic tappets and with rockers to LoC.5441. This modification is to be applied to all future cylinder heads and valves in which rockers without hydraulic tappets to LoC.5441 are used. E/PSN. Att:LoC.5432. | ||