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 responding to a proposal for a dyno-starter, expressing limited interest and outlining objections.
| Identifier | ExFiles\Box 48\3\ Scan313 | |
| Date | 6th December 1920 | |
| X 4216 C+ Da. {Bernard Day - Chassis Design} EFC {E. Fowler Clarke - Electrical Engineer} 3/T, 6th December, 1920. Capt. P. C. Chivers, R.A.S.C., The London Mechanical Transport Repair Depot, Grove Park, London, S E. {Mr Elliott - Chief Engineer} Dear Sir, Re Dyno-Starter. X294 We have now fully considered your dyno-starter referred to in your letter of Nov. 12th addressed for the attention of the undersigned, but would like to say that we have only limited interest in this scheme. The idea of gear mechanism in which the gear ratio is changed with a reversal of power is not new to us and has been previously considered by us in connection with a Scott combined motor and dynamo, enabling the machine to run about 20 times faster in relation to the engine as a motor than as a dynamo. Although we think that the change of gear ratio on reversal could be satisfactorily carried out, the particular design of the mechanism by which the change of speed is brought about in the case of your dyno-starter would not suit our ideas. Our objections to the scheme are really not so much on this score as electrically. We know that even with the speed change practically no gain in weight is secured by having a combined unit whose operation both as a motor and a dynamo is as efficient generally as each machine taken separately. Yours faithfully, | ||