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).
Causes and cures for wheel wobbles at different speeds.
| Identifier | ExFiles\Box 28\4\ Scan084 | |
| Date | 29th September 1913 guessed | |
| No.2. is released they die out. They can be stopped by increasing speed. They apparently cannot be produced at a greater speed then 20 m.p.h. which I suggest is due to the gyroscopic action of the front wheels. Reducing the speed increases them in violence until the car stops. (3) A wobbles occur at a definite speed, and are noticeable principally on a smooth road, 1/2 m.p.h. up or down stops them. The wheels must be much out-of-balance, more than 1 lb. for them to be noticeable and they then appear as a faint tugging at the steering wheel, not in the least alarming and such as would probably would not be noticed except under extreme conditions and by a man looking for them. You must keep the car exactly on that speed for a few moments before they will appear. (4) (A) wobbles can be immediately cured by reducing the inclination of the pivots. (5) (B) wobbles can be cured by balancing the wheels, but the average wire wheel at least is sufficiently well balanced to need no attention. (B) wobbles do not seem of very much consequence. (over) | ||