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).
Examination of condenser performance, comparing the effects of temperature on capacity using paraffin wax and various varnishes as dielectrics.
| Identifier | WestWitteringFiles\L\July1924-September1924\ Scan81 | |
| Date | 16th August 1924 | |
| Contd. -3- XPC1/T16.8.24. Examination of the curves will indicate that so far as these tests are concerned at any rate, the rise in capacity with temperature is due to the use of varnish as a dielectric, and in one case, No.1335, due to impurities in the paraffin wax. They show that the most reliable dielectric, from the point of view of constancy of capacity, is undoubtedly pure paraffin wax, and that the actual temperature of the melting point of paraffin wax is of little consequence. As previously reported in our XPC3/T20.10.23, there is no definite evidence that the rise of capacity on chassis with the standard condenser, in which varnish is used, has caused any irregularity in the working of the ignition, with an otherwise good condenser. It may even be something of an advantage. Nevertheless, it is interesting to note that we can now produce condensers satisfactorily which will stand up to the temperatures experienced, without the tendency to have their capacities increased. Note. It appears from the curves that the Se condenser with Klo varnish is bad from the point of view of increasing the capacity of the condenser, this curve starting lower and finishing higher than the Ss{S. Smith} condenser with Stickiline varnish. Contd. | ||