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).
Effectiveness of a new silencer compared to the 'Silver Ghost' model and querying horsepower curve data.
| Identifier | ExFiles\Box 66\2\ scan0081 | |
| Date | 14th September 1925 | |
| -> To Hs.{Lord Ernest Hives - Chair} from BJ. Copy to... PN.{Mr Northey} BJ3/H14.9.25. X8230 Re EXHAUST NOISE: 103-MO. After writing BJ7/DN11.9.25, in which I mentioned that the latest silencer on this car seemed to be about as efficient as the old 'Silver Ghost' silencer, when the car was standing, I find that this also was the case when the car was running, and the silencer seemed to be quite effective. I am not sure from your memorandum received this morning whether the horse-power curves refer to the first modified silencer or the silencerwhich we are now testing in London. Will you kindly let me know? B.J. | ||