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).
Preliminary test results on Silchrome valves with chrome plated stems and reduced clearance in valve guides.
| Identifier | ExFiles\Box 96\2\ scan0101 | |
| Date | 23th January 1936 | |
| -2- Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}9/JH.23.1.36. P Preliminary tests have been carried out on Silchrome valves with chrome plated stems running with .001-.0015 clearance in the valve guides. This is only half the normal clearance as used with KE.965 valves and is certainly a step towards consistently quiet valves as it is possible with the present clearance in the guides to apply a sideways load on the valve and quieten its operation. Hs{Lord Ernest Hives - Chair}/Swindall. | ||