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).
'singing' noise issue with dynamos and slack bearings.
| Identifier | ExFiles\Box 183\M22\ img062 | |
| Date | 28th June 1920 | |
| To EFC. from R.{Sir Henry Royce} Copy to CJ. " " HS.{Lord Ernest Hives - Chair} x.294 ORIGINAL. RE DYNAMOS. x.3014 (V.{VIENNA} NOISY) DYNAMO & CUTOUT 1 EX Regarding the singing of the dynamos, we feel certain that this gets worse in time, possibly due to the bearings getting more slack.(suggest testing with slack bearings.) We shall be glad to know if you are making an effort to prove the accuracy of the suggestions made some time ago as to the cause of the singing, because on 1 EX. the dynamo and cutout have been unsatisfactory in many ways, and the dynamo is about the noisiest thing on the car. LUCAS MADE R.{Sir Henry Royce} RECEIVED 1 JUL 1920 | ||