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).
Valve movement, its causes like spring action, and proposals to prevent valve rotation.
| Identifier | WestWitteringFiles\P\July1926-September1926\ Scan070 | |
| Date | 19th August 1926 | |
| TO HS.{Lord Ernest Hives - Chair}) FROM R.{Sir Henry Royce} RG.{Mr Rowledge}) Hs{Lord Ernest Hives - Chair} 20 AUG 1926 (RECEIVED) ORIGINAL R4/M19.8.26. X.4005 X3822 X.8060 VALVE MOVEMENT We believe this takes place, as suggested by E.{Mr Elliott - Chief Engineer}, 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 overheated through pre-ignition, etc, or maybe when water or steam is present in the combustion chamber. These can be made artificially. We believe that motion on the inlet valve does take 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} | ||