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).
Investigation into high-speed steering wobbles, specifically regarding the pivot vertical and radius rods.
| Identifier | ExFiles\Box 28\4\ Scan349 | |
| Date | 26th August 1925 | |
| To Hs.{Lord Ernest Hives - Chair} from DA.{Bernard Day - Chassis Design} +457 DA{Bernard Day - Chassis Design}2/M26.8.25. HIGH SPEED STEERING WOBBLES. X.8430 X.457 We believe R.{Sir Henry Royce} has either spoken or written to you some further suggestions on steering wobbles. It would be of interest to us to know whether the pivot vertical in the centre of the wheel has any influence on steering wobbles. With the Michelin disc wheels it looks as though it were possible to fake up a chassis with this arrangement. We are looking into the question of the design of a front wheel with this characteristic, and any information in advance that you can give us would be of assistance. We wired you yesterday saying that R.{Sir Henry Royce} was interested in the effectiveness of the radius rods on wobbles, if any. The idea of this is that the stiffness of the longitudinal control of the axle may be affecting the point about which the wheel is precessing. The radius rods would give us a max. stiffness. DA.{Bernard Day - Chassis Design} | ||