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).
Addendum regarding a modification to the control brush angle of a P.2.M. Dynamo.
| Identifier | ExFiles\Box 165\6\ img119 | |
| Date | 2nd February 1927 | |
| X5660 To Mr. Brock. c. BY.{R.W. Bailey - Chief Engineer} EFC7/T2.2.27. P.2.M. DYNAMO WITH SINGLE MODIFICATION (POLES ONLY) ADDITION TO EFC5/T2.2.27. Further to our EFC5/T2.2.27, we have now discovered that the control brush has already been advanced so as to make this angle 125°, in which case of course this is not a single modification machine, and the output with the single modification would be far too great. It will therefore be necessary to test the machine with an angle of about 127°, to get the 2° more than at present. EFC. | ||