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).
Electrical current tests under hot conditions for various units and regulators.
| Identifier | ExFiles\Box 166\2\ img123 | |
| Date | 27th October 1937 guessed | |
| -2- Rm{William Robotham - Chief Engineer}/RC.{R. Childs}9/MH.{M. Huckerby} HOT condition. Unit. Amperes. Without ( ENS 1202 - 1 17.4 to 16.0 At all speeds up to 6000 R.P.M Compens- ( ENS 1202 - 2 18.2 to 14.0 " " " " " " " ation. LT 1325 19.4 to 16.4 " " " " " " " With ( LT 1333 - 1 11.7 to 11.2 " " " " " " " Compens- ( LT 1333 - 2 12.3 to 12.1 " " " " " " " ation. Having in mind that our limits, under the same conditions, are 14 to 16.5 cold and 15 to 18.5 hot we make the following comments:- (1) The range of variation with temperature, is still on the wide side. (2) It will be noticed that there is a general tendency for the output to drop with rise in speed up to 6000 R.P.M. (3) We think, on the whole, that the LR.{Mr Ellor}7 type (without the thermostatic control) is more promising, especially as with the LRT.7, at times, a fluctuation was experienced, in the output, which suggested an unstable spring control. Output Currents at 15 Volts. (Terminal A and A1.) Our limits for the C.A.V - Bosch regulator under these conditions are :- 1.0 to 7.5 amperes Cold. 3.5 to 10.5 amperes Hot. We would like to point out here, by the way, that the maximum currents are too high, but that we have been compelled in the past to accept them. Since, however we have had a divided series winding on the LR.{Mr Ellor}7 Regulator, and under conditions of continued | ||