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).
Experimental test report on the blackening of ignition contact points due to oil vapour.
| Identifier | ExFiles\Box 172\3\ img085 | |
| Date | 19th December 1925 guessed | |
| Extract from EFC6/T20725. ------------------- Experimental test report. It is now practically proved that the blackening effect on the ignition contact points which has sometimes occurred on some of the new EAC. chassis is due to the influx of oil vapour through the ball bearing. It is a fact that a similar kind of blackening of the platinum points has never occurred on our bench apparatus, and is nowhere near so frequent on the 20 HP. ignition. There is no doubt that it is a desirable thing to exclude oil vapour from the rotor chamber. EFC. | ||