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).
Wear on ignition system components, including contact points and spark plug electrodes.
| Identifier | ExFiles\Box 90\5\ scan0131 | |
| Date | 7th July 1936 guessed | |
| -3- IGNITION - continued. The amounts of wear on the contact points and rubbing block are considered to be normal. Plugs type K.L.G.850 were used the erosion of the central electrodes being as follows :- .007", .008", .012", .007", .011", .010". | ||