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).
Technical query regarding the behavior of valve bounce on a test rig.
| Identifier | WestWitteringFiles\P\2October1926-December1926\ Scan123 | |
| Date | 22th December 1926 | |
| TO { EG. HS.{Lord Ernest Hives - Chair} } FROM R.{Sir Henry Royce} ORIGINAL R2/M22.12.26. DELIVERED TO WN. DURING XMAS HOLIDAY. c.c to - BJ.WOR.{Arthur Wormald - General Works Manager} VALVE BOUNCE. X 3822 If you run a valve on rig with weak springs fast enough to leave the cam, how does it behave without air? Is it not usual for a falling body such as this, and a contact rocker on a magneto, to always bounce, due to general elasticity and insufficient damping friction. One can well understand the air current causing difference of pressure and retarding the fall so that the valve etc leaves the cam, but I can hardly believe that the air has much to do with the rebound causing it to unseat. R.{Sir Henry Royce} | ||