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).
Test results comparing the electrical properties of seven Redmanol coil cases against one Stabalite case at varying temperatures.
| Identifier | ExFiles\Box 69\1\ scan0036 | |
| Date | 16th September 1926 guessed | |
| -2- more than the stabalite ones which have been replaced. The results of the tests are contained in the following tables and notes :- Results for coil cases :- Tin-foil electrodes were placed on the inside and outside of the coil cases which were raised in temperature by steps of 20ºC to 100ºC, readings being taken at each temperature. Results on seven Redmanol cases and on one standard stabalite case similarly tested for comparison are given, the figures being in micro-amperes. Temperature ºC. Coil case. No. | 20 | 40 | 60 | 80 | 100 ---|---|---|---|---|--- 1 | 21 | 70 | 160 | 560 | 1620 2 | 7 | 70 | 350 | 1050 | 2950 3 | 14 | 42 | 148 | 577 | 2110 4 | 3.5 | 35 | 175 | 775 | 2320 5 | 0 | 3.5 | 126 | 740 | 1970 6 | 7 | 35 | 140 | 490 | 1200 7 | 14 | 100 | 316 | 985 | 2600 Stabalite. | 0 | 0 | 5 | 7 | 10 N.B. R.M.S A.C. test voltage = 2400 Afterwards, the tests at 100ºC were repeated several times in each case (except that of the stabalite) and a redmanol coil case which had run 10,000 miles on a car and had therefore been subjected to frequent heating and cooling, was tested with the others. Following are the figures obtained at successive readings at 100ºC. for each coil case. A line | ||