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).
Analysis of the causes and potential remedies for wheel wobble and oscillation in a vehicle.
| Identifier | ExFiles\Box 80\1\ scan0102 | |
| Date | 9th September 1920 guessed | |
| Contd. The forward motion of the car adds energy enough to keep the oscillation going, in spite of slight friction in the various joints, etc., but notin spite of relatively great friction, such as might be found in a new car, or be produced by releasing the wheel and so bringing the friction of the steer-ing worm into the system. If there were anything in this suggested explanation, one would expect - (4) That the natural period of the car oscillating on the front road springs would bear some relation to the speed of the wobble. It would not necess-arily be the same, because the road wheel are part of the oscillating system in the latter case, but not the former. (5) The speed at which the wobble would occur would be affected by the tightness of the tyres, the stiff-ness of the road springs, the mass of the wheels, and the weight and position of the body. (6) That the reason why removing the springs from the side steering tube sometimes removes the wobbles is because the steering worm is called more effect-ively into play, as well as the reduction of the total springyness. Similarly the plain thrust in the steering column prevents the friction of the worm being utilized for damping. (7) That the most effective remedy would be centre point steering with vertical pivots, as you now suggest. | ||