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 features of the improved No. 2B scheme sequence starter motor.
| Identifier | WestWitteringFiles\Q\April1927-June1927\ 118 | |
| Date | 14th June 1927 | |
| TO EFC. FROM R.{Sir Henry Royce} ORIGINAL R1/M14.6.27. C: oo - BJ. WOH. EAC.7.(B) SEQUENCE STARTER. No.2B Scheme We send herewith drawing LeC. 2425. of the improved starter motor.(2B scheme) 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 excited. We think the teeth of the pinion and the flywheel should be rounded off, like change gear. A feature of this new arrangement 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 important advantages we expect are a more silent action, greater reliability, and longer life. R.{Sir Henry Royce} | ||