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).
Test report on Morganite brushes used on a Goshawk dynamo.
| Identifier | ExFiles\Box 50\5\ Scan039 | |
| Date | 5th May 1922 | |
| R.R. 300 (120B) (SF 349 24-1-19) MP 200557 X 4333 95304 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: E.T.C Order No.: Customer's No.: F.D. 176. Re: Morganite Brushes on Goshawk Dynamo. We have run a set of H.M6 morganite brushes on a goshawk dynamo. for 80 hours. The dynamo was run at max output during the majority of this period but a speed of 6,500 was reached & maintained for a total time of about 10 minutes. No undue amount of wear has taken place on the brushes during this run. Say .040" as a maximum. Signed: [Signature] This Sheet must be filed on completion of the work. | ||