Letter from Zenith Carburetter Co Ltd regarding tests on needle seatings for A.A.25 Carburetters.
| Identifier | ExFiles\Box 122\3\ scan0139 | |
| Date | 18th July 1939 | |
| 1033 The ZENITH CARBURETTER·CO·LTD CARS DRIVEN BY OUR STAFF ARE AT CUSTOMERS OWN RISK AND RESPONSIBILITY TELEGRAMS ZENICARBUR, PHONE, LONDON. CODE: A.B.C. 5TH EDITION HONEYPOT LANE STANMORE MIDDLESEX ADJOINING QUEENSBURY UNDERGROUND STATION ALSO AT LYONS, PARIS, DETROIT, TURIN, BERLIN. TELEPHONE WORDWORTH 2213. 18th July 1939. Messrs. Rolls-Royce Ltd, D E R B Y Your ref. Rm {William Robotham - Chief Engineer} /CTS {C. Trot Salt - Carburation} 4/JH Attention: W. A. {Mr Adams} Robotham Esq. Dear Sirs, Needle Seatings for A.A.25 Carburetters Since receiving your letter of the 22nd ulto. reference as above, we have been making tests to find out the possibility of supplying needle seatings to your requirements and operating under a static head of 3'6". We find that a needle seating of .140" diameter, the needle having a coned end with an included angle of 90° and the point of the needle being rounded will give, under a constant head of 3'6" (gravity feed) a flow of 128 pints per hour, and that is the maximum we have been able to obtain. Our experience leads us to believe that with needle seatings of .140" in diameter we might expect exceedingly great trouble in ensuring that the P.T.O. | ||
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).