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 laboratory and road testing of redmanol encased coils versus standard stabalite coils.
| Identifier | ExFiles\Box 45\4\ Scan263 | |
| Date | 14th October 1924 | |
| Contd. --2-- EFCI/T14.10.24. On 19.6.24 it was again brought into the laboratory and tested, together with redmanol encased coil TR{Capt. F. W. Turner - Finance}5 and two standard stabalite coils, at artificially obtained temperatures of 77°, 82°, 87° and 100°C. My assistant's report WA.{Mr Wallis}80 on these tests is attached. Quoting from the summary of results obtained:- "It will be seen that the redmanol encased coils "in both cases give better results than the stabalite "at all four temperatures, 77°, 82°, 87° and 100°C. "and it is suggested that they should be given further "thrashing tests on chassis in a thoroughly hot condition." Later it was tested again with a different redmanol encased coil TR{Capt. F. W. Turner - Finance}3 (see below) and a report WA.{Mr Wallis}85. of 6.10.24 is also attached. The results were materially the same. Finally this coil is at present instructed to be fitted to the latest Goshawk chassis CF.68 for continuation of ordinary running conditions. TR.{Capt. F. W. Turner - Finance}2. This was received by us in February last. (The No. of turns on the secondary of all these coils is 18,000). This coil was put direct on chassis 7-GII, without first having undergone a production test, and covered 392 miles. It was then removed (being replaced by TR{Capt. F. W. Turner - Finance}3) and carried through the production test (as above) with satisfactory results. On 27.2.24 it was put on 6-GII for the 10,000 mile test and has remained on this chassis to date, having covered 13,781 miles with satisfactory results. During this period, however, it was temporarily removed for the purpose of thrashing tests with coil TR{Capt. F. W. Turner - Finance}3, in comparison with a standard stabalite encased coil No.4383 on chassis 7-GII, these results being recorded under TR{Capt. F. W. Turner - Finance}3. section. TR{Capt. F. W. Turner - Finance}3. This coil was received at the same time as TR{Capt. F. W. Turner - Finance}2 above. As in the case of TR{Capt. F. W. Turner - Finance}2 it was not previously put through the production test, but was placed on 7-GII when TR{Capt. F. W. Turner - Finance}2 came off on 15.2.24. While on 7-GII thrashing tests of this coil and of TR{Capt. F. W. Turner - Finance}2 (as stated above) were carried out in comparison with standard stabalite encased coil No.4383, and the results of these thrashing tests, given by Mr. F.A. Gibson, are attached, which the figures refer to the magnitude of the external gap between the H.T. terminal of the coil and the central terminal he distributor. Contd. | ||