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).
Production specification for inspection and test of a Phantom II medium output dynamo with a 48 coil armature.
| Identifier | ExFiles\Box 62\3\ scan0121 | |
| Date | 23th January 1931 | |
| X6004. By.{R.W. Bailey - Chief Engineer} from EFC. c. Sft{Mr Swift}/Mr.Brock EFCl/AD23.1.31. X.6088. PRODUCTION SPECIFICATION OF INSPECTION & TEST OF R.R. PHANTOM II MEDIUM OUTPUT DYNAMO X.6004. WITH 48 COIL ARMATURE. Herewith please receive copy of the above specification which is applicable to 48 coil armature dynamos without the field pole modification represented by the machine which we have recently fitted to Sg{Arthur F. Sidgreaves - MD}'s car 58-GN concerning which we have recently received a report Sg{Arthur F. Sidgreaves - MD}8/E21.1.31 that "the output of this dynamo as rearranged on 58-GN now seems very good under all conditions". For purposes of reference we here state that the angle between the control brush and the main positive brush is 129°. Specification attached. EFC. | ||