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 The S.U. Carburetter Co. Ltd. discussing the development progress of small and large self-feeding carburetters.
| Identifier | ExFiles\Box 121\3\ scan0071 | |
| Date | 15th May 1940 | |
| TELEPHONE: BIRMINGHAM EAST 1171. TELEGRAMS: FLEXCARBUR, BIRMINGHAM. C.T.S. 1631 THE S.U. CARBURETTER CO. LTD. PROPRIETORS:- MORRIS MOTORS LTD. VISCOUNT NUFFIELD CHAIRMAN W. M.{Mr Moon / Mr Moore} W. THOMAS VICE-CHAIRMAN T. C. SKINNER, M.I.A.E. MANAGING DIRECTOR ADDERLEY PARK, BIRMINGHAM, 8. YOUR REF: OUR REF: JNM/MRC. 15th May, 1940. File W. A.{Mr Adams} Rowbotham, Esq., Messrs. Rolls-Royce Ltd., DERBY. Dear Mr. Rowbotham, I feel I ought to write to you to let you know what progress we have made with the Self-Feeding Carburetters of the size which would be of interest to you. I think I may say that, in the case of the small Self-Feeding Carburetter, designed for an 8 h.p. engine, a sample of which I showed you on the occasion of my last visit, we have now reached finality, and this job appears to be entirely successful. I very much regret to say, however, that we have not had such good results with the larger carburetter. The primary requirement of this type of Carburetter is to obtain a substantial "multiplication factor", which term we use to denote the ratio of the depression produced in the throat of the variable venturi, and that existing in the induction tract under full throttle conditions. In the case of the small Carburetter this ratio has been between 3 1/2 and 4. In the case of Ctd. | ||