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).
Leakage tests on K.L.G. and Champion sparking plugs intended for use with leaded fuel.
| Identifier | ExFiles\Box 33\3\ Scan255 | |
| Date | 15th September 1927 | |
| ? X1812 a.{Mr Adams} EFC. 15.9.27. LEAKAGE TESTS ON SPARKING PLUGS TO BE USED WITH FUEL CONTAINING LEAD. The twelve sparking plugs, 6 K.L.G. and 6 Champion, submitted to us have been given a preliminary test. On each plug the maximum [handwritten: available d.c.] voltage was applied, i.e. that voltage which almost produced a spark at the plug electrodes, but in no case could a deflection be detected on the micro-ammeter. The applied voltages ranged from about 570 volts to 1000 volts. These plugs are now handed to the intention being that they come back for retesting after they have been used on the aero engine. EFC/C.A.P. | ||