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).
Graph showing the results of main-brush position tests on a Goshawk Dynamo No. 288.
| Identifier | WestWitteringFiles\J\May1923\ Scan33 | |
| Date | 27th April 1933 | |
| II MAIN-BRUSH POSITION TESTS OF STANDARD R GOSHAWK DYNAMO No 288. Control brush adjusted in each case, to give a final temperature of from 70°-74°C at maximum load. Final ambient temperature 21°C. CURVE 6 Brushes O°retd " 5 " 4½° " " 4 " 9° " " S " 13½° " [As received] 75°C. } Positions measured circumferentially on carcase from average neutral position. AMPERE OUTPUT DYNAMO R.P.M. M^C/1 27.IV.33 E.7-C | ||