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).
Wear issues and design improvements for the Peregrine Battery Ignition Governor following a 10,000-mile test.
| Identifier | ExFiles\Box 61b\2\ scan0199 | |
| Date | 25th February 1933 | |
| WST 86119. To R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} E.1/HP.25.2.33. c. Ser. Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} Peregrine Battery Ignition Governor. On the last 10,000 mile test of Peregrine in France considerable wear was found to have taken place between the sleeve on the ignition governor and the pin through the shaft transmitting the advance and retard motion to the L.T. cam etc. The wear was undoubtedly caused by the seizing up of the L.T. cam spindle due to rust resulting in excessive load on the pin in restraining the governor movement. We believe we have cured the rust trouble by making sure that an oil seal is always maintained at the bottom end of the governor casing to exclude crankcase gases but this incident has nevertheless directed some attention to the pin drive and we feel that the scheme might be improved. At present the pin is made taper from one end to the other and is driven tightly into the central spindle with the outer sleeve in position, and is restrained from coming out by a gun lock through the small end which projects beyond the sleeve. The sleeve is slotted vertically where it drives the pin and owing to the latter being tapered it drives on one side only and by line contact. On blueprint LeC.3358 attached, we show a suggestion for using a parallel pin which can be centreless ground and hardened if desired, and drives through close fitting circular holes in both sleeve and spindle. The pin is retained in position by slipping a piece of tube over the driving sleeve, and the lower end of this tube is pressed into an undercut in four places. With this scheme the pin transfers the vertical control of the cam spindle to the driving sleeve which rests on its own lubricated thrust face on the main driving shaft. The oil collecting groove at the top of the sleeve is retained as heretofore, which collects and holds up some | ||