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).
Front pivot issues caused by unbalanced tyres and a proposal for a test to diagnose the problem.
| Identifier | ExFiles\Box 2\12\ B002_X168-page029 | |
| Date | 25th March 1929 | |
| W.M. R12/B14313. From F.H.R., Copies sent to: Mr Hives Mr. Johnson, Mr. Wormald, Mr. Spinney. Re Front Pivots. a Waldron has found here/Dunlop new tyre made at their French factory very much out of balance, so much so that at 40 miles per hour it is impossible to hold the steering wheel still. I am inclined to think that this combined with slackness of the joints of the cross steering tube may be the cause of the broken sphere and steering pivots in the French cars. I sent from Paris particulars of a test to ascertain out of balance much as that mentioned above. English near side wheel to be driven at a high speed, while the steering fixed or held firmly by hand. To drive this it will be necessary to arrange the electromotor or driving shaft directly under or over the stub axle. A special belt & pulley will have to be fitted to hub of the road wheel and if an electromotor is used its axis will have to be inclined so as to be parallel to the stub axle, otherwise the chassis will have to be tilted up so that the belt will run correctly. The pulley fixed to the road wheel should have a good crown so that there will be little difficulty in getting the belt to run on the centre of the pulley. The pulley on the shaft or motor which drives it would have to be long and parallel. F.H.R. W.L. Wormald [STAMP: W.M. RECEIVED 25 MAR 1929] X168 | ||