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).
Report investigating a 'chunking' noise and metallic rattle originating from the drivetrain and hubs.
| Identifier | ExFiles\Box 124\3\ scan0318 | |
| Date | 22th February 1935 | |
| -2- Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}18/KW.22.2.35. 5-B-IV. This car is very bad for chunking when taking up the drive and slow and medium running. Quite 70% of the metallic noise comes from the driving shafts and driving pieces in the Hubs. The fit of the driving shaft splines and driving dogs can be cut down to a minimum but still a metallic noise can be heard. This is because there is no oil to damp out the metallic ring of the steel, and the brake drums amplify it. Also, being on the outside of the car, the noise is more noticeable. The binding effect of the differential is a possible cause of the rattle from the driving dogs. Hs{Lord Ernest Hives - Chair}/G.W.H. | ||