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A New Angle on creating lateral accelleration of a wheeled vehicle.
The accepted way to cotrol the steer angle of a wheeled vehicle is by some direct link between the driver input control and the steered wheel/s, but this is not necessarily the best arrangement for a narrow tilting vehicle. A new concept is under review which allows the steered wheels to be dynamically controlled by tilting them, along with the vehicle mass. This system is becoming known as Free to castor[FTC]. The directional control of a FTC wheel is not particularly strong as exampled by a shopping trolley, and the castor will turn due to any applied side loading. However if the castor is tilted its directional stability above about 10mph is very strongly controlled by the dynamic forces and if the castoring element is attached to the front of a narrow tilting vehicle the castor will automatically place itself on the correct steer angle for the tilt and the speed of the vehicle. This knowledge is revealed in Patent WO2005/075278 and there is gathering acceptance of the viability of this system as a practical way to create a narrow simple steer tilting vehicle
