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).
Page discussing the forces, couple, and torque acting on a front spring and axle when a wheel is locked, illustrated with two diagrams.
| Identifier | ExFiles\Box 178\1\ img124 | |
| Date | 13th July 1926 guessed | |
| - 25 - friction between the tyre and the road is acting at the tyre in the opposite direction to the car momentum. These two forces constitute a couple. It is clear that if the pivot was very weak it would be twisted off. The pivot, however, can be made any required strength. The difficulty is to make the springs sufficiently strong to take the torque without twisting. If the front spring only consisted of one leaf, it would take up position II when the wheel was suddenly locked. [Text from top diagram] THROUGH C of G MOMENTUM OF CAR FRICTION BETWEEN TYRE AND ROAD. [Text from bottom diagram] POSITION I FORCE POSITION II FRONT OF CAR AXLE TWISTED FORWARD. FORWARD LEAN ON THE PIVOTS FORCE contd. | ||