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 differences between a Delco-Remy contact breaker and a proprietary one, with details of ongoing ignition system tests.
| Identifier | WestWitteringFiles\Q\December1926-January1927\ 72 | |
| Date | 24th December 1926 guessed | |
| -6- Contd. Another point of difference between the Delco-Remy contact breaker and our own, which perhaps has not beens sufficiently pointed out previously, is that in their case the contact lever is insulated and the screw point is earthed. Apparently there must be some feature about the Delco-Remy which enables better results to be obtained than on our own, but from the results of our tests there certainly is no one particular feature indicated as being the definite difference. Would it be possible to have an experimental design of contact breaker more on the lines indicated by the above results ? The results would not appear to be, as it might have seemed natural to suppose, a question of the magnitude of the condenser capacity. Previous tests have also indicated this. In regard to corresponding simultaneous tests on an experimental chassis, systemmatic tests on both tungsten and platinum points on the RR. contact breaker under the three sets of conditions of ignition equipment, viz. A.{Mr Adams} Previous standard, B. Present standard (finer primary coil). C. Present standard with double ballast resistance, are or have been in progress. One such test, No.2C, is referred to in the details. Of two others, both under conditions similar to those of 2C, i.e. tungsten points with Contd. | ||