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 two alternatives for carburetter progression.
| Identifier | ExFiles\Box 122\1\ scan0204 | |
| Date | 17th June 1935 | |
| The ZENITH CARBURETTER·CO·LTD 40 - 44 NEWMAN STREET LONDON. W 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: MUSEUM 9106-9. June 17th. 1935. Mr. C. T. Salt, Experimental Department, Messrs. Rolls-Royce, Ltd., DERBY. Dear Mr. Salt, Many thanks for your letter of the 13th. instant. I note your remarks and as regards Progression, there are at least two alternatives:- (1). The use of a progression slot in place of one or more progression holes, and, (2). The use of a variable progression orifice. Of course, it is impossible for us to say exactly what dimension of progression hole is required in a carburetter when that carburetter is applied to an engine which has not come within our previous experience, and I can only repeat the offer already made, namely, to send an expert to your works to rough out the requirements on the road, | ||