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).
Suggesting tests on brushes with modified bevels to investigate brush noise.
| Identifier | ExFiles\Box 60\1\ Scan045 | |
| Date | 11th July 1928 | |
| X8673 11.7.28. BRUSH CONTROL TESTS In connection with brush control tests, and investigations into brush noise generally, we think that a set of brushes, with the bevels increased (by filing) from 15° to 60° would be very useful. These could be done by ourselves if necessary. C.A.Pignatt. | ||