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).
Investigation into the cause of singing in a Lucas E.575 dynamo and a potential solution.
| Identifier | ExFiles\Box 36\4\ scan 144 | |
| Date | 20th July 1920 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 X.3014b 91417 ROLLS-ROYCE LIMITED. INSTRUCTIONS. I To: S. + C. Customer's No.: TC H Re: X.3014b X.294 Singing of Lucas E.575 dynamo. Investigations in the cause of the above show that the singing may be reduced by pressing a non-magnetic metallic mass against the carcass of the dynamo. The improvement in the case of the Lucas is not so much as in the case of the Aero dynamo. which runs at a much higher. Signed: (Cont d.{John DeLooze - Company Secretary}) This Sheet must be filed on completion of the work. | ||