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).
Letter to Messrs. Lodge regarding the testing of detachable steatite sparking plugs.
| Identifier | ExFiles\Box 162\6\ img076 | |
| Date | 8th June 1925 | |
| K4428 HsS/LG. 8th. June 1925. Messrs. Lodge, RUGBY. Dear Sirs, With reference to the detachable steatite sparking plugs which you sent to us for test at the end of last month. We find with the open end type we get definite pre-ignitions after running full power for a few minutes. The type with the closed ends appear to be better. In the meantime we are continuing our tests and will let you know the results of the further tests shortly. Yours faithfully, | ||