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).
Issues with the Spectre valve gear, including valve bounding and limitations of lead bronze bearings.
| Identifier | ExFiles\Box 96\2\ scan0010 | |
| Date | 12th September 1934 | |
| X4094F 354 To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}10/KW.12.9.34. SpectreCodename for Phantom III Valve Gear. When talking over the SpectreCodename for Phantom III the other day you will remember that we commented on the low speed at which the valves were bounding. Attached is a rough estimate of what is happening at present, we cannot run the present engine fast due to lead bronze bearings. I think we can say, however, that we want drilled valves if we are to get away with the present strength of valve springs. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||