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).
Freezing tests of Goshawk paper condensers.
| Identifier | WestWitteringFiles\K\December1923\ Scan36 | |
| Date | 28th November 1923 | |
| R.R. 403A (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} COPY. Expl. No. 4430 REF: FG.4. Nov. 28th 1923. EXPERIMENTAL REPORT. attached to EF62/T4.12.23. FREEZING TESTS OF GOSHAWK PAPER CONDENSERS. The object of this experiment was to ascertain the effect of a comparatively low temperature on a condenser which had previously been subjected to a comparatively high temperature, and which had, in consequence, acquired an increase in capacity. The condensers used are as follows :- (1) No.32. Twice carried through heating test. (2) No.613. Condenser baked at a higher temperature. (3) No.741. Varnished condenser. (4) U.S.A. Bosch. Two tests were made, condensers 1, 2 and 3 only being used in the first, and the same condensers again, with the addition of No.4, in the second test. The low temperature was obtained in both cases, by exposing the condensers all night to a frost. In the first test capacity readings were taken before exposure, and again at the end, after the condensers had been brought inside and left for an hour in which to rise to, and settle down at a the temperature of the room. In the second test, the capacity readings were taken and the condensers exposed all night as in the previous case. On being brought in, however, the capacities were immediately again measured, and the temperature in the open, noted. Capacity readings were then taken every ten minutes until they shewed no further | ||