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).
Issues and proposed modifications for the Senior Range Servo Motor.
| Identifier | ExFiles\Box 152\2\ scan0261 | |
| Date | 23th September 1940 | |
| 1294 To Rm.{William Robotham - Chief Engineer} c.c to Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby} c.c. to Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} c.c. to Ev.{Ivan Evernden - coachwork} Servos general C Ev{Ivan Evernden - coachwork}/Tln.1/JH. 23.9.40. SERVO MOTOR - SENIOR RANGE. Merely be dismantling the servo plate and reassembling, leaving adjustment unaltered, we alter the funtioning of the servo. This suggests the servo disc is not always going home properly on its spigot and three driving pins, and the friction face does not run true. Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby} will confirm that this is really occurring, and will try one driving pin instead of three to find whether assembly is more accurate and whether the one pin gives a satisfactory drive. Water Exclusion. Wym.{G. Harold Whyman - Experimental Manager} will try to get some rubber pieces vulcanised to the corrugated spring plate. (a) A washer at the inner diameter to form a seal against the gearbox. This may have to be graphitised rubber because the spring plate moves relative to the gearbox. (b) Some rubber form round the outside of the spring plate to replace the sticky tape, which is unsightly and unsatisfactory. Both these pieces may have to be oil resisting rubber. Tln. Ev{Ivan Evernden - coachwork}/Tln. | ||