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 quality, supply, and ordering of dynamo brushes for the Goshawk.
| Identifier | ExFiles\Box 50\5\ Scan023 | |
| Date | 18th February 1922 | |
| To RHC.{R. H. Coverley - Production Engineer} from EFC. EFC1/T18.2.22. X.4383 - GOSHAWK DYNAMO - BRUSHES. The quality of brush Mr. Royce favours for the Goshawk dynamo is Le Carbone Grade O (marked Z). We have had 8 of these brushes which I think have now been used up on the various machines built. We have, however, brushes in Le Carbone C.G.3 and X qualities and also in E.C.C. Morganite. I am sending you herewith one set (3 brushes) of E.C.C. Morganite, two sets (6 brushes) in C.G.3 Le Carbone and two sets (6 brushes) in Grade X Le Carbone, making five sets in all. I am immediately ordering further brushes of the grade O quality. - meanwhile we have, if necessary, further sets of X and C.G.3. brushes. EFC. | ||