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).
Instructions regarding the testing and comparison of different brushes to solve a chattering issue.
| Identifier | ExFiles\Box 165\6\ img066 | |
| Date | 29th June 1929 | |
| RR 238 (150 BKS.) (BH57.29-6-29.) MP 224356 ROLLS-ROYCE LTD. INSTRUCTIONS. To______________________ 19__ Order No._____________ Customer's No. 2 These brushes appear to be worth further test. We were informed by Mr Lawrence of the Le Carbone Co, that there and EGA brushes had a lower co-efficient of friction than Z grade, and as they compare with Z in other features they may offer a solution to the chattering difficulty sometimes experienced. A closer comparison with EG2 Morganite brushes from this point of view might also be beneficial. Signed [Signature] This Sheet must be filed on completion of the work. | ||