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 describing an ignition fault indicator device for engines, particularly aero engines.
| Identifier | ExFiles\Box 33\1\ Scan039 | |
| Date | 15th October 1920 guessed | |
| circuit or circuits; the gaps are enclosed in a case with a glass top or cover & fixed on the dash board. Should a plug get fouled or the magneto fail it is indicated instantly. This device is useful for aero engines or any type of ignition. Enclosed is a sketch of a six cylinder type of indicating box. A reply in any case will be appreciated. Thanking you. Believe me. Yours Faithfully, Frederick W. Conway | ||