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).
Investigation into machine performance, related to lamp voltage and brush angles.
| Identifier | ExFiles\Box 70\3\ scan0234 | |
| Date | 31th March 1926 | |
| EFC3/T31.3.26. -2- Contd. very largely on the actual lamps which are used - one maker's lamps may differ considerably from another (say by about half a volt) and just make the difference. We have not investigated the brush angles of the machine with high output, but those on the machine with low output are quite normal. We have now returned the normal machine to Mr Brock. EFC. | ||