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).
Spark generation and condenser discharge in the Goshawk ignition system.
Identifier | ExFiles\Box 34\1\ Scan303 | |
Date | 18th January 1922 guessed | |
-2- Contd. may be done at the instant of make rather than that of break. You may remember that we have already proved the existence of a spark at make by synchronously eclipsing the contacts at the instant of break and noting the result. There may be still some oscillation going on in the primary when the contacts again make at which instant, in this case, there may be an extremely high frequency oscillatory discharge of the condenser across the points. This point we are again investigating in the Goshawk ignition. We think that such a tremendously sudden liberation of energy of the contacts may have a bigger disintegration effect than that of a more conductive discharge at break. One would think that a paper condenser with more dielectric hysteresis would be less harmful in this respect than one of mica. | ||