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).
Specifications for a higher output dynamo for the Prince of Wales' car 115-WJ.
| Identifier | ExFiles\Box 60\1\ Scan177 | |
| Date | 28th January 1930 | |
| x 7660. By.{R.W. Bailey - Chief Engineer} from EFC. c. Mx.{John H Maddocks - Chief Proving Officer} EFC3/AD28.1.30. X.8664. X.7660. DYNAMO FOR PRINCE OF WALES CAR 115-WJ. This dynamo will be of the Phantom II higher output type, i.e. it will bear the same relation to the Phantom II standard dynamo that the Phantom I higher output type bore to the Phantom I standard dynamo. It should be instructed to be a Phantom II standard armature core wound with three turns per coil of No.17 SWG. D.C.C. in place of four turns per coil of No.18 SWG. D.C.C. The commutator position will be the same as in the Phantom II standard, but the control brush will be spaced from the main positive brush at an angle of 127° in place of 122° as in the standard case. We should like to have an opportunity of having this machine for test. EFC. | ||