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).
Design and advantages of an improved sequence starter motor, with reference to drawing LeC. 2425.
| Identifier | ExFiles\Box 64\4\ scan0041 | |
| Date | 14th June 1927 | |
| x7655 B TO EFC. ) FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} ) c.c. to BJ. WCR. SAC.7.(B) SEQUENCE STARTER. R1/M14.6.27. x7625 x7655 We send herewith drawing LeC. 2425. of the improved starter motor. Most of the parts are the same as previously, but arranged differently. The drawing is so clear and simple as to require no explanation further, than that given in R1/M11627.(to EFC. only.) There is a little work to be done in retaining the oil at the pinion end. We shall be glad if you will put all that is possible in hand at once, as soon as you have made the necessary calculations and experiments to ascertain the end pull available, and the desired position of the magnets relative to the armature. We do not want too much force in case the press button is used while the engine is running. We do not know how to make this impossible, as our engine will run so slowly and quietly, and the dynamo would not be exited. We think the teeth of the pinion and the flywheel should be rounded off, like change gear. A feature of this new arrange-ment is that it permits of the largest flywheel and clutch with the maximum road clearance. It will be noted that we are able to use a smaller pinion on the motor, and so increase the ratio over that possible with the Bendix type of pinion, and this will justify some of the expense of the more elaborate electrical arrangement. But the more import-ant advantages we expect are a more silent action, greater reliabil-ity, and longer life. R.{Sir Henry Royce} | ||