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 Zenith Carburetter Co Ltd regarding carburetter flow rates with gravity tanks versus mechanical pumps.
| Identifier | ExFiles\Box 122\1\ scan0190 | |
| Date | 6th June 1935 | |
| 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. 40 - 44 NEWMAN STREET LONDON·W ALSO AT LYONS, PARIS, DETROIT, TURIN, BERLIN. TELEPHONE: MUSEUM 9106-9. June 6th. 1935. Mr. C. T. Salt., Experimental Department, Messrs. Rolls Royce, Ltd., Nightingale Road, DERBY. Dear Mr. Salt, In reference to my visit yesterday I would like to say how much I appreciate both the kind and courteous manner in which you received both Mr. Howell and myself, and the interest you are showing in the carburetter we have had the pleasure of placing before you. As promised, I enclose a Table of Flow through Needle Seatings at various heads. These figures are taken by means of a gravity tank and it has been our experience that, when using a mechanical pump of the A.C. type, it is necessary to supply a larger seating than would be required at the same head under gravity, to the extent of approximately doubling the quantity. For instance, supposing you wanted 80 pints per hour from a seating fed from a pump the maximum delivery pressure of which was 2 lbs. per square inch, then we should | ||