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).
Standardisation sheet and recommended control brush angle for the Phantom dynamo's 28 slot armature.
| Identifier | ExFiles\Box 68\4\ scan0038 | |
| Date | 19th July 1928 | |
| To BY/RD. from EFC. X8672 EFC5/T19.7.28. PHANTOM DYNAMO WITH 28 SLOT ARMATURE. Referring to your BY/RD6/M18.6.28, we are now circulating a standardisation sheet for the 28 slot armature for the Phantom so that it should be quite O.K. to go ahead with the ordering of the material. The recommended control brush angle for this machine is 124°, i.e. the angle between the main positive brush and control brush. We cannot say that this will not require a slight modification after production of these armatures has commenced. EFC. | ||