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).
Trial and noise issues of a new exhaust system and its cut-out feature on different car models.
| Identifier | ExFiles\Box 72\4\ scan0238 | |
| Date | 20th October 1924 | |
| -2- BJ-1/D20.10.24. countries, such as Australia, etc., until the cure has been found. PN.{Mr Northey} and I have tried this new exhaust on closed cars and consider it is passable as it can only be heard to any extent in the front driving seat, usually occupied by the chauffeurs, and then it cannot be heard nearly as badly as on an Open Touring Car. The exhaust cut-out, when open, makes an entirely new and very objectionable noise, quite unlike the low booming noise that the old exhaust cut-out had. It is hoped that this can also be cured at the same time. BJ. | ||