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).
Potential causes for engine misfiring, focusing on spark plug gaps, point erosion, and tungsten contact point oxidation.
| Identifier | ExFiles\Box 178\4\ img014 | |
| Date | 24th November 1920 | |
| -2- Whilst we agree that with smaller plug gaps the H.T. electric stresses are less we do feel that a plug gap below .020" will increase spark point erosion and make the KLG gas setting more critical in customers hands. We are a little puzzled at the misfiring on M.G.IV., and we will overhaul what we have done with a view to ascertaining if there can be any other possible cause of misfiring. One thing we might mention is that the tungsten contact points have been known to cause irregular firing after long use and we wonder if Lodil has cleaned these from any oxide? FB/MSL. | ||