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).
Specifying the brush angle for a 40/50 48-coil high output dynamo and requesting production samples for testing.
| Identifier | ExFiles\Box 60\1\ Scan266 | |
| Date | 2nd October 1930 | |
| X6006 By/RB.{R. Bowen} from EFC. EFC3/AD2.10.30. X.6006. 40/50 48-COIL HIGH OUTPUT DYNAMO. We are now able to give the angle between the main positive brush and the control brush for the above type of machine more accurately at 129°. In order to make a final check of this angle, and to complete a specification of production test for this type of dynamo, we should be pleased if you would arrange for us to receive three of these machines from production as soon as possible. EFC/CAP. | ||