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).
Instruction sheet detailing a repeat test on X and EG3399 brushes, noting sparking, wear, and commutator segment condition.
| Identifier | ExFiles\Box 50\5\ Scan390 | |
| Date | 10th November 1924 | |
| RR 238 (150 BKS.) (SH57 29-6-20.) MP 224356 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Order No.: AC. 31. Customer's No.: XX4610, 4383 Repeat Test of X and EG3399 Brushes. (on dynamo B) The test of these brushes reported AC.26/30-IX-24. has been repeated. There was a fair amount of sparking all round this time, the brush surfaces being fairly good with slightly dull trailing edges. As before the commutator segments also showed signs of burning at the trailing edges. The wear of the brushes is:- Positive .0135", Negative .006", Control .0205" Signed: FKA. This Sheet must be filed on completion of the work. | ||