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).
Suggestion for making tappets truly vertical in an engine, including a comparative sketch.
| Identifier | WestWitteringFiles\T\January1929-February1929\ Scan186 | |
| Date | 23th February 1929 | |
| SECRET. -E.{Mr Elliott - Chief Engineer} ) FROM R.{Sir Henry Royce} -BY.{R.W. Bailey - Chief Engineer} ) (At Le CanadelHenry Royce's French residence.) HS.{Lord Ernest Hives - Chair} ) R8/M23.2.29. REC'D AT WW. 28.2.29. ORIGINAL G.{Mr Griffiths - Chief Accountant / Mr Gnapp} to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} CWR. (Strikethrough) L.H. SS.{S. Smith} ENGINE. x7772 (handwritten) /x7060 (handwritten with strikethrough) My suggestions of making the tappets truly vertical, and keeping the push rod at its present inclination seems to suit the case well. The sketch below shews what I understand you are working on, exaggerated. Push rod inclined as R.H. L.H. engine. This tappet truly vertical. (handwritten line crossing out "truly vertical") Force causing friction on upper guide is extremely low and intermittent, but we should provide good area and lubrication, and be sure the parts are hard as lower guide. R.H. engine. Inclined all the way. A = to B. C = to D.{John DeLooze - Company Secretary} E = to F.{Mr Friese} Centreline. When I condemned my own suggestion I thought the R.H. tappet was vertical. 18-EX. valve gear etc is quieter than any we have had, and clearances of tappets remain more constant. R.{Sir Henry Royce} | ||