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 regarding idle mixture screw issues on 'Wraith' and 'Phantom III' carburetters.
| Identifier | ExFiles\Box 102\3\ scan0207 | |
| Date | 20th April 1939 | |
| Copy sent to By.{R.W. Bailey - Chief Engineer} Rm.{William Robotham - Chief Engineer} B4/158. The ZENITH CARBURETTER·CO·LTD HONEYPOT LANE STANMORE MIDDLESEX ADJOINING QUEENSBURY UNDERGROUND STATION CARS DRIVEN BY OUR STAFF ARE AT CUSTOMERS OWN RISK AND RESPONSIBILITY TELEGRAMS ZENICARBUR, PHONE, LONDON. CODE A.B.C. 5TH EDITION ALSO AT LYONS, PARIS, DETROIT, TURIN, BERLIN. TELEPHONE WORDSWORTH 2213 20th April 1939. Messrs. Rolls-Royce Ltd., The Hyde, HENDON, N.W.9. Attention: Mr. Hancock, Service Investigation Dear Sirs, "WRAITH" and PHANTOM 111 CARBURETTERS Mr. Fisher has reported a number of points to us and has asked us to reply to you direct. 1. The first complaint relates to the idle mixture screw failing to screw in far enough. We understand you have suggested that we cut off the first three threads of the screw. As regards this matter, the screw to which you are referring has not been fitted to the carburetters since 26.5.38, as now the carburetter has volume control of slow running. We think this week we have handled a sample of what you complain, and we found when the carburetter was returned to us that the control screw was only screwed in about three turns and had then been locked up very | ||