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).
Test report on the performance of dynamo brushes after 10,000 miles of road use.
| Identifier | ExFiles\Box 165\6\ img171 | |
| Date | 6th June 1928 | |
| EFC. X5870 6.6.28. EG.3417 BRUSHES ON 29 ARMATURE SLOT DYNAMO 161. ON 11-G3. This experiment has now run 10,000 miles on the road. The brushes are doing well, but the commutator somewhat burnt. The dynamois reported to have run quietly throughout the test. F.J.Allen. | ||