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).
Temperature testing procedures and observations for different groups of condensers.
| Identifier | WestWitteringFiles\K\October1923\ Scan97 | |
| Date | 29th October 1923 | |
| Contd. -3- EFC3/T29.10.23. (d) & (e) The temp. was again raised to 55°C, whilst a few observations were taken, and then continued up to 70°, after which it was allowed to fall to 45°C, observations being taken both for rise and fall. Then temperature fell to normal. (f) & (g) Finally the temperature was raised from normal to 45°C and allowed to fall again to normal, observations being taken in both cases. The second group of condensers, viz. Nos. 30, 774, Liberty again, and a 40/50 mica condenser, were taken through a somewhat different sequence, namely:- (h) & (i) The temperature was raised gradually to 45°C, and then allowed to fall gradually to normal, observations being taken in both cases. (j) The temperature was then again raised gradually, this time to 65°C, observations being taken, after which the temperature was allowed to return to atmospheric without observations being taken. (k) & (l) The temperature was now taken up rapidly to 65°C, only a few observations being taken, and then continued up to 75°C and down again to 55°C, whilst some observations were taken, after which the temperature fell to normal, without observations being taken. (m) &(n) Finally the temperature was taken up to 55° and down again to normal, observations being taken for each direction. The various stages in the sequence are suitably indicated by letters on the curves and arrowheads. In addition to the above observations of capacity variation with temperature, a number of other observations of capacity variations from day to day on various condensers (including some of these specially tested as above) have been made, and the general conclusions arrived at below include the results of these observations. Contd. | ||