Vectrix and some of its properties suited to flight dynamics

A vectrix cross-product operator identity is presented which shows the symmetrical relationship between a column matrix and a vectrix. The kinematics of vectrices and other commonly used relations are then easily obtained with it. The time derivative of the transformation matrix is extended to a more general form of expression. The results can be used conveniently in the modeling of flight dynamics in which many reference frames must be used.