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 to D. & J. Tullis Ltd. regarding the performance of 'Cindal' alloy in carburetter components.
| Identifier | ExFiles\Box 74\2\ scan0025 | |
| Date | 30th April 1928 | |
| c. ROY.{Sir Henry Royce} c. H.I. c. Hs.{Lord Ernest Hives - Chair} +4351 43995 30th. April 1928. BY2/G.30.4.28. Messrs. D.{John DeLooze - Company Secretary} & J.{Mr Johnson W.M.} Tullis Ltd., Laboratory Department, Clydebank. Dear Sirs, Referring to your recent communication in connection with the use of 'Cindal' your claims are possibly well established in regard to the use of 'Cindal' in sea water. We did not find that we gained any advantage in using an air valve for our carburetter made in 'Cindal'. The air valve has to work in a phosphor bronze barrel as a close sliding fit, and under these circumstances slight alkalinity causes the 'Cindal' air valve to stick owing to apparently electrolytic action taking place between the material of the valve and the phosphor bronze of the barrel in which it is fitted. In this respect 'Cindal' material displays no advantage over ordinary aluminium and up to the moment a number of other alloys which we have tried have equally failed to solve the problem. At the moment we are carrying the experiments further by substituting a different material for the barrel in which the air valve slides, but in this case we anticipate that the selection of a suitable material for the barrel will enable us to use our standard material for the valve, and since 'Cindal' appeared to have the same disabilities as ordinary aluminium when in contact with another material, we do not think that we shall find any special advantage in its use, although we intend to try out our ordinary standard material against 'Cindal' for the air valve in each type of material we select for the barrel. Yours faithfully, WHarvey Bailey TECHNICAL PRODUCTION ENGINEER. FOR ROLLS-ROYCE LIMITED. | ||