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).
Testing for mechanical wear and experiments with brushes and commutators.
| Identifier | WestWitteringFiles\J\March1923\ Scan36 | |
| Date | 26th March 1923 | |
| EFC4/T26.3.23. -3- Contd. We will also test, as you request, the result of mechanical wear only, also find out answers to your other queries. We began experimenting with softer brushes, but discontinued these experiments in view of your preference for the Z Le Carbone. We do not think more angular embrace is necessary. We have ascertained that it would be easily possible to have 100% more sections in the commutator and would only add slightly to the cost of production of this item. EFC. | ||