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).
Proposed experiment for the Phantom valve rocker gear to test valve seating noise.
| Identifier | WestWitteringFiles\Q\April1927-June1927\ 51 | |
| Date | 30th April 1927 | |
| TO DY.{F R Danby} FROM E.{Mr Elliott - Chief Engineer} C. to - BJ.HS.{Lord Ernest Hives - Chair} ORIGINAL E3/M30.4.27. X8060 PHANTOM VALVE ROCKER GEAR. We send herewith drawing LeC. 2411. shewing the Phantom valve gear modified to provide tappets above the valve. The object of this experiment is to test the effect on the valve seating noise of lifting the valve with an absolutely vertical motion. The tappets should be a close fit in their guides since they are not subjected to the heating effects under which the valve spindles have to work. In the design shewn the valve has been shortened by leaving out the gland/using a double valve spring. We think you would like to test this mechanism first on a standard Phantom, and for this purpose it will be necessary to pack up the rocker about .330 and make the valve gear cover taller to suit. The initial pieces may be made from castings for the purpose of experiment. E.{Mr Elliott - Chief Engineer} | ||