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).
Performance and stability tests of various condensers under different conditions.
| Identifier | WestWitteringFiles\K\October1923\ Scan98 | |
| Date | 29th October 1923 | |
| Contd. -4- ( EFC3/T29.10.23.) The following remarks with reference to the particular condensers specially tested may be made. Condenser No.31. Previous to undergoing the temperature test the capacity of this condenser had remained low but fairly steady. There was a tendency, however, for the capacity temperature curve represented on the average by an increase of 1.8% per degree centigrade from capacity at atmospheric temperature, to fall somewhat. This particular condenser was not much affected by the temperature sequence recorded on the curve. By this we mean that the temperature capacity curve for the atmospheric range was not materially altered. Subsequently it remained steady with a slight inclination to fall. Condenser No.32. Previous to undergoing the capacity temperature test the capacity-temperature curve of this condenser had remained low and steady, the effect of the temperature sequence through which this condenser was first put (recorded in our previous report on sheet B2) was to raise this curve such that the capacity at a given atmospheric temperature became about double, after which the curve fell slightly in time. Then this condenser underwent the sequence now recorded on sheet C, which again raised the capacity, since which it has again been falling. The above two condensers, Nos. 31 and 32 are ordinary standard condensers previous to the improvements in the connections. Condensers Nos. 741 & 744. These were two special condensers made up with varnish interposed between the layers of paper, the condenser being afterwards compressed, the object being to reduce the variation in capacity. From the results now obtained it appears that this has not had the desired effect. They appear to have behaved in a way precisely similar to that of the standard. Condenser No.30. Similar remarks to those made for Nos. 31 and 32 apply to this condenser, with the exception that the capacity at a given atmospheric temperature is not changed Contd. | ||