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).
Instructions regarding a singing noise from the control brush at approximately 800 RPM.
| Identifier | ExFiles\Box 36\4\ scan 146 | |
| Date | 24th January 1919 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 ROLLS-ROYCE LIMITED. INSTRUCTIONS. 91419 To III 19 Order No. Customer's No. 7C. 93. Re The Control brush (say one com. seg.) The Singing strains at its maximum at about 800 R.P.M. on a normally set machine (this is when only a Small current is delivered to the battery) The Singing is "moved about" within a range by moving the control brush. i.s. the speed at which the dynamo delivers a certain current is altered. (Cont'd) Signed This Sheet must be filed on completion of the work. | ||