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).
Cause of noise in the Phantom Auto Advance magneto sleeve.
| Identifier | ExFiles\Box 48\2\ Scan387 | |
| Date | 4th May 1926 | |
| To HS {Lord Ernest Hives - Chair} /RM {William Robotham - Chief Engineer} & EFC. {E. Fowler Clarke - Electrical Engineer} X8796 Extract from R1/M4.5.26. PHANTOM AUTO: ADVANCE. X.8685. (A) Referring to your memo. of 23.4.26. I understand the noise is caused by the swing of the magneto sleeve due to the positive and negative torque. It is difficult to understand why a spring cannot be used to keep this sleeve in one direction, together with a certain amount of friction to damp it against the slight oscillation caused by the elasticity of the control. As far as I can understand this is actually taking place on 7-EX. The cause of the noise in the magneto with part friction and part retard spring should be found. | ||