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).
Potential inlet air noise issue with experimental Phantom and 20 HP engines.
| Identifier | ExFiles\Box 66a\2\ scan0057 | |
| Date | 1st September 1927 | |
| Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to BJ. X8060 R6/M5. 9.27. PHANTOM AND 20 HP. EXPERIMENTAL ENGINES RECENTLY BROUGHT HERE. X.5770 X.8070 X.8060 E.{Mr Elliott - Chief Engineer} has been inclined to think that the inlets are making a noise similar to the fault we ran into when the inlet valve opened during pressure in the cyl. Whether this is so or not I am a little bit doubtful, but we want you to be aware of the possibility of running into another epidemic of inlet air noises, due to change of timing and overlap. R.{Sir Henry Royce} | ||