This paper considers radial truck configurations and improvement in the stability and curving performance of a truck It is shown that all possible inner-truck suspensions are characterized by four independent stiffnesses and two geometric parameters. Also all possible connections between a truck frame and a wheelset in it are characterized by one geometric and two independent stiffness parameters. By use of the linear approach to dynamic stability and curve negotiation, the performance of a truck with an anti-yaw damper and connections between a truck frame and a wheelset is calculated.
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Fujioka et al. (1984) studied this question.