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).
Simpler and quieter design for an SS chassis engine valve rocker cover.
| Identifier | WestWitteringFiles\T\January1929-February1929\ Scan122 | |
| Date | 9th February 1929 | |
| E.{Mr Elliott - Chief Engineer} (Struck through) } FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} } (At Le CanadelHenry Royce's French residence.) BY.{R.W. Bailey - Chief Engineer} (Struck through) } SECRET. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} (Struck through) to SG.{Arthur F. Sidgreaves - MD} WGR. SS.{S. Smith} CHASSIS ENGINE VALVE ROCKER COVER. (Handwritten and struck through) x7090 (Handwritten and struck through) x7060 Four nuts and all the springs and felt that Derby suggest seems too much for this purpose. We must get down to the simplest that will achieve the object. One would imagine that if you have felt or cork you do not want springs and four studs. If you have many studs and spring washers you might do away with the cork. All this cannot be needed to retain the oil, and fumes should be drawn into carburetter. It must be centred on noise. My own impression is that there is an easier way of doing it, perhaps by local pieces of cork or felt, and the 3 studs E.{Mr Elliott - Chief Engineer} suggests would be simpler, lighter, cost less, and be silent unless we must make it airtight for silence - (this could be tested.) But what would happen if we doubled everything in the same way. Our own 18-EX. valve gear etc is extremely quiet. R.{Sir Henry Royce} | ||