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).
The testing of condensers, detailing a resonance test and listing serial numbers of units considered acceptable for car use.
Identifier | ExFiles\Box 34\1\ Scan230 | |
Date | 21th March 1921 | |
Contd. -3- EFC7/T21.3.21. voltage of the mains and the resistance of the secondary winding, as in these circumstances the inductance of the winding is counteracted entirely by the capacity of the condenser. The voltage on the condenser terminals is up in respect to that of the mains in proportion to the milli-amperes actually observed to those which are observed when the condenser is connected to the mains direct, thus an estimate of the resonant voltage is obtained. We think that each Dubilier made condenser should be put through this test and afterwards through the standard production test which, if it stands, should be considered O.K. for the car. Of the condensers we have tested we consider that Nos. 730, 780, 813, 727, 800, 825, 778 and 796 should be quite O.K. for the car. Should we, however, still experience failures in using these condensers on the car, then apparently it would be necessary to make our resonance test still more drastic by using the transformer voltage as the supply voltage and using the resonance on the top of that to obtain a still higher oscillatory voltage on the condenser terminals, but we do not feel at the moment that this should be necessary. We return the condensers herewith. EFC. (08-2T-01 284 E.{Mr Elliott - Chief Engineer}'S) (L.001) Y3R 'R'N | ||