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).
Note on determining the permissible duration of inlet valve opening for car work by referencing aero cams.
| Identifier | ExFiles\Box 13\2\ 02-page087 | |
| Date | 5th June 1931 guessed | |
| (2) We do not know what duration of inlet valve opening is permissible for car work, but hope to find out from these aero cams. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||