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 petrol filter specifications.
| Identifier | ExFiles\Box 44\1\ Scan151 | |
| Date | 1st June 1927 | |
| 43700 CARS DRIVEN BY OUR STAFF ARE AT CUSTOMERS' OWN RISK AND RESPONSIBILITY. Telegrams: "ZENICARBUR, PHONE," LONDON. Telephones MUSEUM 9106-9. Code: A.B.C. 5th EDITION. THE ZENITH CARBURETTER CO. LTD. 40-42, NEWMAN STREET, LONDON, W. 1 Messrs. Rolls Royce. Ld. Derby. Also at LYONS, PARIS, DETROIT, MICH. (U.S.A.) MILAN, THE HAGUE, TURIN. STAMP: THE SOCIETY OF MOTOR MANUFACTURERS & TRADERS STAMP: THE MOTOR TRADE ASSOCIATION Dear Sirs: Ref. HS{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}3/LG. We are in receipt of your letter of the 31st. with regard to the Petrol Filters, but do not quite understand your remarks. We would respectfully point out that we have never made a filter up to the present with a different diameter of disc to our standard. What we have done is to increase the gap between the disc from .05 m/m to .07 m/m but we have kept to the same outside diameter. We had found that a filter with a .07 m/m gap passed considerably more petrol without interfering with the efficiency, because a piece of dirt that would pass through the .07 m/m gap was much smaller than any of the orifices used in carburetters, so that there would be no chance of the jet becoming choked up. We therefore think you must be under a | ||