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).
Valve bounce for engine 1-EAC-11 with a low lift camshaft.
| Identifier | ExFiles\Box 180\M3\M3.4\ img031 | |
| Date | 1st September 1924 | |
| R.R. 493A (40 H) (SL 42 12-7-23). J.H. D.{John DeLooze - Company Secretary} -2- Exptl. No. REF Hs{Lord Ernest Hives - Chair}/CHF/1010.9.24. EXPERIMENTAL REPORT. VALVE BOUNCE. Engine 1-EAC-11. - with low lift Camshaft. SPEEDS. 2750 Exhaust valves perfectly steady. Inlets leave the cam on opening for approx. .150" as if functioning as an automatic valve. 2800 Exhaust valves O.K. Inlet valves same characteristics as 2750 r.p.m. 2900 Exhaust valves O.K. Inlet valves bounce on opening practically eliminated. 3000 Exhaust valve O.K. Inlet valves bounce on closing only. 3150 Exhaust valves O.K. Inlet valves bounce opening and closing. Exhaust valves perfectly steady at all speeds up to 3150 r.p.m. ------------------- Hs{Lord Ernest Hives - Chair}/CHF. | ||