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).
Requesting tests on three different modifications of a starter motor pinion.
| Identifier | ExFiles\Box 64\4\ scan0176 | |
| Date | 8th February 1929 | |
| RHC.{R. H. Coverley - Production Engineer} from EFC. X7655 EFC1/T8.2.29. SEQUENCE STARTER MOTOR PINION We are now awaiting from you for test three different modifications of pinion - (1) Pinion with both engaging and disengaging corners left entirely sharp. Verbal. (2) Pinion with sharp engaging corners rounded disengaging corners and backed-off teeth. Instructed by BY/RD8/M112.1.29. (3) Pinion with all edges rounded off like gear teeth which presumably includes some degree of rounding off in the shape of packing off. EFC3/T7.2.29. We should be pleased to have these pinions for test on our rig at your early convenience. EFC. | ||