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).
On overoiling and faulty ignition in post-war cars, discussing ignition plug performance and potential replacements.
| Identifier | ExFiles\Box 35\3\ scan 124 | |
| Date | 11th November 1920 | |
| X 4196 Wor.{Arthur Wormald - General Works Manager} from EP.{G. Eric Platford - Chief Quality Engineer} EP{G. Eric Platford - Chief Quality Engineer}6/F11.11.20. X.3614. RE AMERICAN VISIT - POINTS FOR ATTENTION. (3) OVEROILING AND FAULTY IGNITION. X.1812. X.3905. X.3413. X.4196. This is a serious complaint on post-war cars. but on investigating the cases brought forward, the feature seems to be one entirely of the ignition plugs not being able to stand slight overoiling. We must certainly look upon the fact that the present plugs are not satisfactory, and a plug which is capable of running in well lubricated cylinder without failing, and at the same time is satisfactory in other respects, must be obtained and standardised for our car as soon as ever possible. This is feel is one of the most important point for us to push. America reported that more satisfactory running can be obtained with the "Champion" Plug, also the "Bethlehem" Plug, and according to the results obtained on tests whilst i was there, they certainly showed improvement on the present plugs. X.3763. "Champion" plugs are also being used by Mr. Royce on his car (1.EX) which is inclined to over-oil. At the same time, they appear to be giving much more satisfaction than the present standard Lodge plugs. This weakness of the plugs is also the chief cause of poor slow running on magneto ignition. | ||