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).
Internal memorandum discussing design alterations for SS valve gear and desaxe tappets.
| Identifier | WestWitteringFiles\T\January1929-February1929\ Scan111 | |
| Date | 7th February 1929 | |
| HS.{Lord Ernest Hives - Chair} } FROM R.{Sir Henry Royce} E.{Mr Elliott - Chief Engineer} } Copy to SG.{Arthur F. Sidgreaves - MD} " " SECRET ORIGINAL REC'D AT WW. 7.2.29. R5/M3.2.29. SS.{S. Smith} VALVE GEAR. DESAXE TAPPETS. X7060 X1157 Since the contact runs out to meet the cam is there any need to offset, and would it be possible to tell the difference. I doubt it. Mr. Bailey's suggestion is good but somehow I don't like it. Would you like to incline the whole pushrod the amount of the offset? If this is not possible could we include the lower part: it measures about 1 in 100. I regret that our SS.{S. Smith} would need to be altered from what we have made and tested. It might worry Mr. Wormald, though I feel sure any of the suggestions will work. This valve gear is even better than we imagined because it concentrates under the lighter load and spreads out when heavily loaded. Personally I would rather alter so as to submerge in oil if we must alter at all, but I fear this is a big alteration. Will E.{Mr Elliott - Chief Engineer} kindly let me know which will not delay SS.{S. Smith}, and is preferable to those concerned - WOR.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} HS.{Lord Ernest Hives - Chair} - i.e. what is recommended. It might pay us to leave SS.{S. Smith} as it is, and make the L.H. SS.{S. Smith} oil submerged if we cannot alter our first SSs. to the same. We could perhaps do so some time in the near future. Anyway it seems we must not embarrass the work. R.{Sir Henry Royce} | ||