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).
Discrepancy in timing markings for the E.W.6 magneto on S.S. chassis and suggesting an alteration.
| Identifier | ExFiles\Box 65\3\ scan0394 | |
| Date | 1st September 1929 | |
| X7791 By.{R.W. Bailey - Chief Engineer} from EFC. c. By/NHW. EFC3/ADL1.9.29. X.7791. TIMING MARKING OF E.W.6. MAGNETO FOR SS.{S. Smith} CHASSIS On the S.S. cars it is understood that the timing datum for both battery and magneto ignition is considered to be the fully advanced, so that both ignitions are adjusted to synchronise in their fully advanced position. The timing marking of the E.W.6. magneto however, as shewn through the window in the distributor cover and by the marking of the distributor wheel tooth through the lubricator window, corresponds to the fully retarded timing of the break. Apparently this point has been overlooked, because in the Test Dept. the magnetos are actually timed to the engine from the break, and not from the indications given through the windows. For Instruction Book purposes however, it appears quite necessary to ask for these window indicated timings to be altered to correspond to the break in the fully advanced position instead of the fully retarded, and we suggest that Messrs. North be approached to make this alteration on standard E.W.6. magnetos. Apparently special consideration will have to be given to cars which will have been delivered with magnetos with the timing indicators referring to the retarded position. EFC. | ||