Abstract
Both tilt table testing and the calculation of so-called Critical Sliding Velocity (CSV) have the goal of determining conditions wherein a vehicle can be tripped by sideways impact with an obstacle and roll exactly one-quarter turn. This paper reviews the mechanics associated with each of these metrics. The paper extends the derivation of the CSV calculation to compute initial sideways velocities needed to initiate a tripped roll of more than one-quarter turn. Particular attention is paid to the mechanics of the second quarter-turn, examining boundary conditions that, depending on terrain, might be part of the continuing roll event.