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).
Report page detailing a modification to the oil supply system for SS engines by altering the rocker shaft.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan035 | |
| Date | 19th January 1929 guessed | |
| contd :- -2- improved the cold oil supply, with causing excessive flow when hot, by putting a small 'flat' over the oil holes on the push rod side of the rocker shaft. This small flat brought the oil hole into communication with the annular space formed between the two halves of the bush. With this arrangement it was necessary to restrict the valve pad end of the rocker by means of a plug bored with a .062 dia. hole to prevent too much oil flowing over the valves and introducing the tendency for the exhaust to smoke during light running. So far our tests have shewn that the above has certainly been the most satisfactory scheme tested and we suggest that this should be employed on the first production SS.{S. Smith} engines. Hs{Lord Ernest Hives - Chair}/A.C.Lovesey. | ||