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 vehicle roll and kingpin forces, comparing pusher and puller Dubonnet suspension systems.
| Identifier | ExFiles\Box 170\3\ img041 | |
| Date | 14th July 1933 guessed | |
| -11- of the qualities of a horizontal axis. To the extent to which the axis is vertical, the car as a whole points to the left during the period from A to C and right from C to E.{Mr Elliott - Chief Engineer} Again this causes a clockwise precession torque which is maximum at B, and counter clockwise maximum at D.{John DeLooze - Company Secretary} And again this torque will be dependent on caster. 3. Now considering the axis as horizontal, it will be seen that at B the car has rolled through a maximum angle to the right. The reaction of the rear suspension and tires is therefore producing on the car a maximum angular acceleration tending to roll it to the left. It follows that the kingpins are being accelerated to the right and, if the centre of gravity of the swing masses is back of the kingpins, there will be an angular acceleration tending to turn the wheels to the right. In this respect therefore the pusher Dubonnet is worse than the puller and we have been at some pains both in tests and in firguring to find whether this effect is appreciable. | ||