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).
Sourcing different grades of brushes for the 'Goshawk II' dynamo and motor after a change in brush holder dimensions.
| Identifier | ExFiles\Box 50\5\ Scan008 | |
| Date | 31th August 1921 | |
| S.S. Dept. (100) T(B) N. 79B. 10-12-20. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2047 X4333 To Ey. from EFC. c.c. to Ey/WER. EFCL/T31.8.21. X4333 X4384 X3348 X3945 RE BRUSHES FOR "GOSHAWK II". DYNAMO AND MOTOR. In answer to your Ey3/P30.8.21, we have already obtained a number of sample brushes in different grades of Morganite and Le Carbone for the Goshawk machines, but since that time the brush holder dimensions have been altered and it will be necessary to obtain other brushes. The grades we think we should obtain specimen brushes of, are for the motor, C.M.3 Morganite only, but for the dynamo we should obtain E.G.O. Morganite (as recently recommended (by Messrs. Lucas). C.G.3 Le Carbone. and Grade X Le Carbone. I had already arranged with Mr. Robinson that when the drawings are complete, he would let me know and I would instruct the O.O. to obtain a number of sample brushes. EFC. | ||