Comparison between the Eversure and Dunlop hydraulic jacks, concluding to continue with the Dunlop.
| Identifier | ExFiles\Box 26\3\ Scan072 | |
| Date | 4th May 1931 | |
| W/S. {Derby Works / Sales} H. {Arthur M. Hanbury - Head Complaints} From Hs {Lord Ernest Hives - Chair} /Lid. {A. J. Lidsey} 83117 Hs {Lord Ernest Hives - Chair} /Lid. {A. J. Lidsey} 4/KT.4.5.31. EVERSURE HYDRAULIC JACK. With reference to H.1/H28.4.31, we have previously compared the dimensions of the Eversure Jack and the standard Dunlop. The dimensions of the Dunlop Jack are only just sufficient to cope with all demands that can be made upon it. The Eversure has a greater minimum height and less lift; it fails therefore on both these points. It may appear to have sufficient range when demonstrated in a garage but it will certainly be deficient on a cambered road, or a road with a somewhat soft surface. With regard to the paragraph concerning the present Dunlop Jack, we have gone to a great deal of pains to improve this accessory, and the type supplied on both our models at present is satisfactory in that we have never heard of a failure and have not been able to produce one after very severe tests. It appears better therefore to continue to use the Dunlop in preference to the Eversure, the latter being an unknown quantity as regards reliability in addition to having insufficient range of operation. Hs {Lord Ernest Hives - Chair} /Lid. {A. J. Lidsey} | ||
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).