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).
Road test report on high speed wobbles resulting from a specific axle configuration and wheel type.
| Identifier | ExFiles\Box 67\4\ scan0299 | |
| Date | 13th May 1927 | |
| 48430 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG13.5.27. HIGH SPEED WOBBLES. 4457 / 48430 We have carried out a road test on the old type axle with pivots such that the stub axle was at right angles to the king pin bearing, the result being that the wheels had a cant of 2 1/2°. Michelin disc wheels were fitted giving a point of contact very considerably inside that of centrepoint. The result of this test proved that the steering was very unstable on large locks, tending to take charge and suffered badly from joggles, having a definite tendency to wobble between 50/60 m.p.h. The general feeling was quite impossible. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||