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).
Oscilloscope test results for valve bounce on Engine 1-EAC-11 with a high lift camshaft at various speeds.
| Identifier | ExFiles\Box 72\1\ scan0228 | |
| Date | 19th September 1924 | |
| Hs{Lord Ernest Hives - Chair}/GHF/LG19.9.24. VALVE BOUNCE - 'OSCILLOSCOPE'. Engine 1-EAC-11 - with high lift Camshaft. SPEEDS. 2500 Inlets and exhausts follow cam. 2570 Inlets just starting to bounce on closing Exhausts valves steady. 2600 Inlet valves bounce slightly on both opening and closing. E xhaust valves steady. 2650 Inlet valves bounce opening only. Exhaust valves steady. 2700 Inlet valves bounce closing only. 2750 Inlet valves bounce considerably - closing only. 2850 Inlet valves bounce - opening only. 2950 Inlet valves bounce on opening and closing (slightly). Exhaust valves bounce closing. ------------------- contd :- | ||