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 of Main-Brush Position Tests on a Goshawk Dynamo No. 288, plotting Ampere Output versus Dynamo R.P.M.
| Identifier | ExFiles\Box 50\5\ Scan178 | |
| Date | 1st December 1936 | |
| II AMPERE OUTPUT DYNAMO R.P.M. MAIN-BRUSH POSITION TESTS on STANDARD RR GOSHAWK DYNAMO No 288. Control brush adjusted to cut out, to give a final temperature of from 70°C to 74°C maximum on test. Final ambient temperature 21°C. CURVE & BRUSHES RETARDED 6 7/64" O 5 -4/64" O 4 -1/64" O 3 -5/64" O (Correctional) Positions measured circumferentially on Burman from average neutral position H/A 1.12.36. C.M.E | ||