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).
Improved exhaust and inlet valves and the potential need for a longer duration cam due to their increased weight.
| Identifier | ExFiles\Box 14\6\ Scan207 | |
| Date | 1st August 1931 | |
| BY.{R.W. Bailey - Chief Engineer} FROM E.{Mr Elliott - Chief Engineer} X7230 E2/M22. 8. 31. C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} HS.{Lord Ernest Hives - Chair} P. 2. - IMPROVED EXHAUST AND INLET VALVES. X.7230. X.7060 We send you herewith LeC. 2935. shewing the above. It is expected that the increased weight of these valves over the standard will demand some increase in valve spring load unless compensation is provided in another way by the use of a longer duration cam. We are however looking into this question, and in the meantime the valves can be produced and tested with standard springs. E.{Mr Elliott - Chief Engineer} | ||