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).
To G.W. Hancock regarding a report of valve bounce at 3450 r.p.m. on car 21-G-IV.
| Identifier | ExFiles\Box 5a\4\ 04-page077 | |
| Date | 30th July 1934 | |
| x5840 G.W. Hancock Esq., Hotel de France, Chateauroux, Indre, France. Ha/Std.25/KW.30:7:34. We note that you report Valve bounce on 21-G-IV at 68 m.p.h. in top gear, corresponding to 3450 r.p.m. We should like you to confirm this as the tappets fitted to this car when run on the test bed showed no signs of valve bounce until 3750 r.p.m. Ha/Std. | ||