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).
Technical memorandum discussing valve movement, potential erosion, and methods to prevent valve rotation.
| Identifier | ExFiles\Box 66a\2\ scan0036 | |
| Date | 19th August 1926 | |
| To Hs.{Lord Ernest Hives - Chair} RG.{Mr Rowledge} } FROM R.{Sir Henry Royce} c. to BJ. Wor.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} X8060 R4/M19.8.26. VALVE MOVEMENT. X.4005 X.8060 X13822 We believe this takes place, as suggested by R.{Sir Henry Royce}, by the action of the spring. It would be going on in all valves, inlet and exhaust, but may only result in erosion when the exhaust valve is over-heated through pre-ignition, etc., or may be when water or steam is present in the combustion chamber. These can be made artificially. We believe that motion on the inlet valve does takes place, but little harm results because it is cool, and perhaps lubricated somewhat, but it is shewn by the wearing of the seat and lifter. We can prevent the valves rotating motion by (1) the battery of springs shewn on the drawing, sent this week, (2) by cutting the spring up into two lengths half R.H., half L.H., (3) by making the inner spring from ribbon on edge to get equal force L.H. or R.H. to the outer spring. R.{Sir Henry Royce} | ||