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).
Capacity-temperature tests of 20 HP battery ignition condensers.
| Identifier | WestWitteringFiles\K\October1923\ Scan95 | |
| Date | 29th October 1923 | |
| To R & E.{Mr Elliott - Chief Engineer} from EFC. c. CJ. & PN.{Mr Northey} c. BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} WOR.{Arthur Wormald - General Works Manager} c. DA.{Bernard Day - Chassis Design} ORIGINAL EFC3/T29.10.23. X.4430 - CAPACITY -TEMPERATURE TESTS OF 20 H.P. BATTERY IGNITION CONDENSERS. Further to our EFC1/T13.7.23, we have now completed a further series of careful tests on the variation of Goshawk ignition condenser capacity with temperature. The method of carrying out the tests was as previously described in the above report, with the exception that in this instance eight condensers were tested in two groups of four each. The results corresponding to the first group, comprising condensers Nos. 31, 32, 741 and the condenser from a Liberty ignition, are shown on photostat sheets C & D attached. Those corresponding to the second group viz. condenser No.774, the Liberty condenser again, No.30 and a 40/50 mica condenser, are shown on photostat sheets E & F attached. These curves are true capacity-temperature curves up to the points on the curves marked L, at which leakage begins. The capacities being measured in the usual way (by means of an A.C. milliammeter) by the magnitudes of the alternating currents running to and from the condensers under an alternating test P.D. of between 60 and 200 R.M.S. volts, are true capacities so Contd. | ||