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).
The nature of high speed wheel wobble or wheel tramping, including diagrams.
| Identifier | ExFiles\Box 178\1\ img114 | |
| Date | 13th July 1926 guessed | |
| - 15 - In other words, the left-hand lock requires about 33% more effort than the right-hand lock. A consideration of Graph III will shew why this is, the leverage available falling off considerably on the left-hand lock. IV HIGH SPEED WOBBLE, OR WHEEL TRAMPING. (a) The nature of the high speed wobbles. High speed wobbles have recently come into prominence as a steering problem. They are quite separate and distinct from low speed wobbles. When a high speed wobble takes place the whole axle vibrates in a criss-cross manner. In a mild wobble each spring is compressed and extended in turn. In a violent wobble each wheel completely leaves the ground in turn. Each wheel when it hits the ground is turned inwards - when it leaves the ground it is turned outwards. The track of a high speed wobble on a tarmac road is like this:- DIRECTION OF MOTION X We have measured distances X. as great as 10 ft. after particularly violent tramping. contd. | ||