Abstract
In order to verify the validity of “a Detailed Equation,” a full scale experiment was conducted. The Detailed Equation is an equation of the equilibrium of the forces that act on a railway vehicle, which is similar to an equation for solving the overturning problem of a rigid body, but the external forces and the displacement of the car body are taken into account in detail. In the full scale experiment, a lateral force (representing the crosswind) was applied to the test vehicle, and the behavior of the vehicle was examined. As a result, it has been verified that the Detailed Equation is valid for evaluating the critical wind speed of overturning or the wheel unloading ratio.