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).
Faulty Lodge C.9 spark plug, noting that the electrode metal is brittle and breaks easily.
| Identifier | ExFiles\Box 79\1\ scan0209 | |
| Date | 12th December 1919 | |
| EH. X601 Chassis EP{G. Eric Platford - Chief Quality Engineer}16/F12.12.19. RE. FAULTY LODGE C.9 SPARKING PLUGS. I am sending youa plug taken off a chassis which has run about 150 miles, and on which one of the electrodes has broken off. This broke off in adjusting the points, and I specially bring this to your attention as the tendency appears to be for the points to break off rather easily, the metal being very brittle, which I fear may cause trouble on cars in service. EP.{G. Eric Platford - Chief Quality Engineer} R R 235 B (50 B. S F.{Mr Friese} SH. 846. 6-S-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2461. | ||