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).
Intermittent high rate discharge tests on batteries, reference X.664.
| Identifier | WestWitteringFiles\C\June1919\ Scan3 | |
| Date | 11th June 1919 | |
| ORIGINAL. To R.{Sir Henry Royce} from EFC. c. to CJ. c. to Bn.{W.O. Bentley / Mr Barrington} c. to E.{Mr Elliott - Chief Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to BY.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to EH. EFC1/T11.6.19. X.664 - BATTERIES - INTERMITTENT HIGH RATE DISCHARGE TESTS. These tests were carried out on an old type R.R. starter motor with 45 slot armature, loaded up with a brake to a torque corresponding to about 105 amperes. The intermittent switching was carried out automatically using an R.R. electrically operated main switch, and an R.R. aero type ignition driven through reduction gear at a very slow speed, for the purpose of making and breaking the relay circuit. The times aimed at were about 9.5 seconds for the 'on' period, during which the motor was running, and 11.5 seconds for the 'off' period, during which the battery was automatically disconnected. Each battery was allowed to continue giving these intermittent discharges until its terminal voltage had fallen to 9.0 The batteries tested in this way, do not include the Tudor batteries, as they do not maintain this terminal voltage even at the start. The following table gives the results of these tests, two of which were carried out for each battery :- Contd. R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. | ||