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).
Progress report on the experimental construction and testing of condensers, detailing previous test failures and a new proposed procedure.
| Identifier | WestWitteringFiles\C\August1919\ Scan29 | |
| Date | 1st August 1919 | |
| R.R. 235 A (100 T) (S.F. 575, 16-4-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2354. To R.{Sir Henry Royce} from EFC c. to CJ. c. to Bn.{W.O. Bentley / Mr Barrington} c. to EH. c. to Wor.{Arthur Wormald - General Works Manager} c. to By.{R.W. Bailey - Chief Engineer} ORIGINAL EFC3/T1.8.19. X.2512. - RE PROGRESS OF EXPERIMENTAL CONSTRUCTION OF CONDENSERS. A number of condensers of the latest pattern have been made and have stood up satisfactorily in actual service as components of the battery ignition, on the road. We have, however, had one case of a breakdown on the road already described in Mr. Barrington's report. Except in the case of a few of the earlier condensers of this type, all that we have made have been subjected to a test which consists of the application of about 220 volts (R.M.S. value) to the condenser for half an hour, direct from the A.C. mains through a very light fuse which goes immediately if the condenser breaks down. Every condenser had had this voltage applied to it for a few minutes in the process of ascertaining that its capacity lay within the specified limits of .19 to .23 m.f. The majority of the condensers will stand this test easily but we have had one or two cases of breakdown on this voltage. The breakdown of the condenser on the chassis on the road caused us to consider this test too lenient, and we therefore schemed out a test by in which, by means of resonance between the condensers under test and an inductance, we can boost up the voltage on the condenser terminals to anything we are likely to require. At the present moment are procedure is as follows:- Contd. | ||