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 Air Board Office regarding a modified reduction gear design for electric starting motors.
| Identifier | ExFiles\Box 37\2\ scan 022 | |
| Date | 28th June 1918 | |
| COPY+ X.3326 AIR BOARD OFFICE. Central House, Kingsway, W.C.2. 285/7311. Messrs. Rolls-Royce, Ltd., DERBY+ Gentlemen, X.3328. X.3161. June 28th 1918 ELECTRIC STARTING MOTORS. Receipt of your letter dated 24th June reference EY13/P24618. together with enclosure LeC. 954 is acknowledged with thanks. The modified scheme of reduction gear has been carefully considered from both the point of view of efficiency and manufacture, and it is agreed that the design is undoubtedly neater and lighter than the design now being manufactured. The matter has been discussed with the firm selected to embody the gear, and they state it would be impossible to consider the design for their manufacture, and in view of the difficulties in manufacture, and the necessity of great accuracy, on this design. The Lucas gear having already adopted and contracts placed a good deal of preparation had been made for production and consequently the introduction of a change of design at this stage would incur delay. One of the difficulties in manufacture which is particularly referred to is the fitting of the small pinion | ||