Effect of Initial Position of Tornado-driven Missiles on Dispersion Features

Abstract

Liftoff and flight behaviors of tornado missiles, which are initially placed on the ground, are computed using the Fujita's DBT-77 model.  The results have revealed the dependency on the initial positions and the cumulative probability distribution of flight distance and maximum velocity.  It is found the results of the U.S. NRC guide method, where a missile is released from a specific point at 40m elevation, correspond to more than 90% exceedance probabilities.