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).
Laboratory tests of the No.1 scheme sequence starter, comparing different spiral angles for the pinion.
| Identifier | WestWitteringFiles\Q\2-July1927-September1927\ 10 | |
| Date | 8th July 1927 | |
| To R.{Sir Henry Royce} from EFC. c. RJ. E.{Mr Elliott - Chief Engineer} c. EY. Wcr. c. Ds. ORIGINAL EFCl/T8.7.27. SEQUENCE STARTER NO.1 SCHEME. X2650 We have now made some tests on the No.1 scheme sequence starter in our laboratory, using a scrap crankcase, fitted with free crankshaft and the starter motor gear with which we are concerned, i.e. No.1 scheme starter motor with spirally moving pinion engaging into toothed wheel on crankshaft, together with actuator box (to engage pinion) of the type fitted with the switch operated by the movement of its plunger as distinct from the later switch operated by movement of the pinion. A suitable observation hole was cut in the crankcase by which the functioning of the pinion could readily be observed, and by means of which the pinion could be placed by hand into any desired position in relation to the wheel and spiral. In the first instance, a 5° spiral was tried and in the second instance a 20° spiral, other things remaining the same, and the results in the two cases compared. The main and relay switch unit was not used, but instead of this, and in order that the steps in the operation could be more readily observed, we had a switch to represent the push button switch and a main current switch manually operated to take the place of the electrically operated main switch. The place of the main switch operating coil was taken by a small lamp (the lighting of this lamp corresponded to contact of the actuator box operated switch and signified that on the chassis apparatus the main switch would have been made). We, however, Contd. | ||