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).
Engine valve sticking issues on model 12-G-4 due to insufficient oil.
| Identifier | ExFiles\Box 106\5\ scan0032 | |
| Date | 16th October 1928 | |
| Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} & E.{Mr Elliott - Chief Engineer} c. to BJ. Wor.{Arthur Wormald - General Works Manager} PN.{Mr Northey} CWB. X5060 R3/M16.10.28. VALVES. X.5060 X.5040 X.5770 Our experience with 12-G-4 says that the valves are not getting enough oil, especially the inlets, because they have been sticking, spoiling the slow running, and making the engine unreliable at slower speeds, but not affecting the high speeds. It is possible that this fault caused you to blame the pistons because this engine has always been slightly unsatisfactory. R.{Sir Henry Royce} | ||