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).
Modifications to a Bijur Dynamo & Regulator.
| Identifier | ExFiles\Box 180\M1\3\ img002 | |
| Date | 30th January 1918 | |
| R.R. 295 A (400 T) (S C 5396 15-2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1545 -3- R4/W30.1.18. Re - Bijur Dynamo & Regulator. speed not exceeding 1800 revs, it would suit my purpose well, but since we want it to give about double electro motive force than that for which it has been designed it would appear that unless the coils are re-wound (with more than twice the number of turns) the resistance would have to be increased to about double the present amount by an external resistance. The non-inductive resistance belonging to the field circuit could remain apparently exactly as it is at present, because I do not want it to run over such a big range of speed. I should not be likely to drive it at more than 2200, or expect it to do any work at any speed less than 1400, so that the voltage controller has much less work to do than on a car. [Signature] R.{Sir Henry Royce} [Stamp: RECEIVED EX LEE] | ||