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).
The cause of 'singing' dynamos, suggesting the issue is slack bearings and noting a particularly noisy unit on car 1.EX.
| Identifier | ExFiles\Box 36\4\ scan 090 | |
| Date | 28th June 1920 | |
| x. 3014b To EFC. from R.{Sir Henry Royce} Copy to CJ. " Hs.{Lord Ernest Hives - Chair} X. 294. RE DYNAMOS. X. 3014b. X. 3763. R6/G28.6.20. X. 3770. Regarding the singing of the dynamos, we feel cer- tain that this gets worse in time, possibly due to the bearings getting more slack.(suggest testing with slek 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. | ||