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).
The condition of brushes and commutators, comparing the N13 and standard WB machines.
| Identifier | ExFiles\Box 60\1\ Scan030 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8.12.24) MP 306975 ROLLS-ROYCE, LTD. INSTRUCTIONS. To_________________________19__ Order No. P.D.q. (2) Customer's No. __________ On both machines the brushes were well polished. The commutators were light brown in colour, and also fairly well polished. These results confirm our opinion that, commutation generally on the N13 machine is better than that on the late standard (WB{Mr Brazier/Mr Bell}) machine. Also, that there is no fear of excessive brush wear as a result of the brushes being narrow. Signed C.A.P. This Sheet must be filed on completion of the work. | ||