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 De Lavaud Holdings Corporation discussing difficulties with a differential for a 20 HP car.
| Identifier | ExFiles\Box 52\1\ Scan150 | |
| Date | 7th August 1928 | |
| Telephone Nº ROYAL 1837 Telegraphic Address LAVAUDAL, LONDON. Y4474 The De Lavaud Holdings Corporation Limited. ENGINEERS. Directors O. {Mr Oldham} C. HANS HAMILTON. D. {John DeLooze - Company Secretary} SENSAUD DE LAVAUD. W. A. {Mr Adams} BISHOP. H. {Arthur M. Hanbury - Head Complaints} L. PRICHARD. 9 Clements Lane. London, E.C.4. 7th August 1928 NH/JS {Mr Johnson's Secretary} /R1 Sjw Jts Comdr. Briggs, c/o Rolls Royce, 14, Conduit Street, W. 1. Dear Briggs, We have gone into the question of a differential for a 20 h.p. Rolls Royce Car, and we find that there is a certain amount of difficulty attached thereto. If we take this axle as it stands the maximum roller race diameter which we can have will be 75 m {Mr Moon / Mr Moore} /m and this diameter is only suitable for a maximum weight of 24 cwts. this obviously would not do. In the Rolls axle there is a tail end bearing for the bevel pinion and it is this fact that prevents a larger diameter of race being used. For purposes of test I would like to know whether you would be prepared to suppress this tail end bearing, in which case we could give you a thoroughly satisfactory differential. As you know there are very few cars made with the tail end bearing and I think no damage would occur in the 20 h.p. Rolls axle through lack of it. | ||