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 unsteadiness of a spare wheel fitting and a proposed modification to fix it.
| Identifier | ExFiles\Box 103\5\ scan0082 | |
| Date | 18th June 1929 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from GWH.{George W. Hancock - Head Chateauroux} COPY. Hotel de France, Chateauroux, Indre, France. 18.6.29. We have observed the unsteadiness of the spare wheel and the weakness of the fitting. The cause of the vertical movement is the weakness of the stay tubes which give at the bend. We cannot observe any movement of the frame taking place. To overcome this, we are having two stays welded on to the tubes as shewn in the sketch. The lateral movement is due to two weaknesses. Firstly, the bearing surface of the alum. disc on the anchorage plate is not sufficient and the weight of the wheel is sufficient to cause it to rock, as shewn in sketch No.1. The weight coming in between the two stays causes a second weakness of the anchorage plate. The plate whipping which has in our case broken a piece out where the screws hold it to the stays. We are having a flange fitted to the alum. disc D.51717 as shewn in sketch, which apart from giving a larger bearing surface, brings the load more directly on to the stays and should prevent the whipping of the anchorage plate. We will give you the results as soon as we have got it fitted. Hs{Lord Ernest Hives - Chair}/G.W.Hancock. | ||