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).
Clutch friction, transmission rattles in 4-cylinder engines, and the 'Myth' project.
| Identifier | ExFiles\Box 130\3\ scan0210 | |
| Date | 30th June 1944 | |
| To Rm{William Robotham - Chief Engineer}/GB. from Rm.{William Robotham - Chief Engineer} Copy to Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} RmFJH. 1110 Rm.{William Robotham - Chief Engineer}7/LT.30.6.44. I was interested in your memo Rm{William Robotham - Chief Engineer}/GB.1/LT.20.6.31, in which you show that, when the friction value for clutch driven members falls, rattles eventuate. We agree that, in the circumstances, Borg & Beck have got to produce a clutch centre which retains its friction characteristics. I have noticed that 4-cylinder engines are particularly bad for transmission rattles, and therefore one of the points we shall have to watch as soon as the Myth is on the road is to see what limits are permissible on the clutch centre. Some information can be obtained from the 4-cylinder engine at present running, when the experiments now being carried out on the engine mounting have been completed. The conditions on this car are of course not directly comparable with the Myth, because of the split propeller shaft and other features. It may be, however, that we shall be forced to put the small engine into the Senior Range programme, to give us time to finalise the Myth. Rm.{William Robotham - Chief Engineer} | ||