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).
Comparing the performance and quality of LeCarbone and Morganite carbon brushes for dynamos.
| Identifier | ExFiles\Box 35\1\ scan 076 | |
| Date | 29th June 1920 | |
| X 2656 To EFC. from R.{Sir Henry Royce} Copy to CJ. R4/G29.6.20. X.2656. RE CARBON BRUSHES. X 3945 Mr. Bently of Royce Limited informed me that he gets better results from a certain class of LeCarbone brushes than from Morganite brushes. They are also more exactly to dimensions and much better finished. I do not think this is very important to the starter motor, but you may find on the dynamos, should we construct them ourselves, it would be highly desirable to get a brush which not only fits the brush holder accurately, but will run for hundreds of hours with only imperceptible wear. The quality that Mr. Bently prefers of LeCarbone is, I think the single nought type, not the most expensive, and perhaps not the elctrical graphite which I believe is their most expensive. R.{Sir Henry Royce} | ||