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).
Letter from Zenith Carburetter Co. Ltd discussing a banging noise in the silencer on over-run.
| Identifier | ExFiles\Box 122\2\ scan0286 | |
| Date | 27th November 1937 | |
| File The Radcliffe 1033 ZENITH CARBURETTER·CO·LTD CARS DRIVEN BY OUR STAFF ARE AT CUSTOMERS OWN RISK AND RESPONSIBILITY. TELEGRAMS: ZENICARBUR, PHONE, LONDON. CODE: A.{Mr Adams} B. C. 5TH EDITION. HONEYPOT LANE, STANMORE MIDDLESEX ADJOINING QUEENSBURY UNDERGROUND STATION ALSO AT LYONS, PARIS, DETROIT, TURIN, BERLIN. TELEPHONE: WORDSWORTH 2213. 27th November 1937. W. A.{Mr Adams} Robotham Esq., Messrs. Rolls-Royce Ltd, DERBY Dear Mr. Robotham, With further reference to your letter of the 16th instant, with regard to banging in the silencer on the over-run I have now been able to discuss this matter with Mr. Fisher. We are of the opinion that the trouble is not due to the carburetter, because similar carburetters are supplied for other engines and the same system of slow running is employed on practically all carburetters now made over here or in America and therefore the system cannot be at fault. If it was so we should have had this trouble elsewhere but this is not the case. From time to time the question crops up, mostly on commercial vehicles, but it can generally be traced to some peculiarity in the exhaust system. It is not really possible to cure banging in the silencer by carburetter adjustment, but in some cases it can be smothered by making the mixture over-rich, but this is not a cure. P.T.O. | ||