Test of 'Permiss' spark plug adaptors designed to cure engine misfiring.
| Identifier | ExFiles\Box 162\3\ img127 | |
| Date | 15th January 1932 guessed | |
| Report on Test on 'Permiss' Spark Plug adaptors. These adaptors are alleged to cure ignition misfiring on an engine whether due to oil or water on the plug points or external surface of the plug. They were tested on the Scates car (1933 Rover 14HP Pilot-6 cylinders) since it was suffering from a slight gasket leak which allowed a small quantity of water to collect in the four of the cylinder bores overnight. This caused severe missing when starting up, the water being thrown on to the plug points as soon as the starter was used to open the engine. It should now be emphasised that the amount of water was only slight, since if the plugs were removed before the engine was turned over, the amount of water which was ejected from the plug holes on turning the engine was only just visible. The result was that the engine would only fire on two or three cylinders when started & gradually this increased to six - when warm the running was even & satisfactory. | ||
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).