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).
Alternating current frequency for production testing of condensers.
| Identifier | ExFiles\Box 34\1\ Scan162 | |
| Date | 28th January 1920 | |
| X. 2512. To By.{R.W. Bailey - Chief Engineer} from Ck.{Mr Clark} Ck{Mr Clark}1/T28.1.20. X.1627 ? PRODUCTION TESTING OF CONDENSERS X. 2512. In answer to your note By3/H27.1.20, you are quite correct in stating that we should define the frequency of the alternating current as well as the voltage. This point has been overlooked by us owing to the fact that we were dealing with one frequency all the while. We have now added on our own sheet "At a frequency of 41.5" after "Alternating voltage of 210", and perhaps you will kindly do the same on your sheets in par (2) of the Production Condenser Procedure. The frequency is nominally 40 but is actually about 41.5 on the average. Ck.{Mr Clark} | ||