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).
Control brush position and output issues for 40-50 HP higher-output dynamos.
| Identifier | ExFiles\Box 60\1\ Scan243 | |
| Date | 2nd July 1930 | |
| EFC. X8664 BY/RD6/W.2-7-30. Re :- 40-50 H.P. Higher-output Dynamos. (28 Slots. 56 Coils.) We have now produced several high-output Machines with a control brush position of 127°, and the Works tell us that they find it impossible to obtain the outputs required in the Specification with this position, and they have to move the brush 24° back towards its original position. To avoid the necessity of elongating the holes after drilling, will you please look into this question and let us know if you agree to us adding a revised position on the drawing. It is suggested by the Works that if they use the standard control brush position, that would be suitable. BY/RD. | ||