This theory is based on one of the gyroscopic properties which apply to any object spinning in space,even a rotating airplane propellar. As the nose of the airplane is raised or lowered, or moved left or ight, a deflective force is applied to the spinning propellar which results in a reactive force known as precession. Precesssion is the resultant action or deflection of a spinning wheel (propellar) in thiscase when a force is applied to its rim. This resultantmforce occurs 90 degrees ahead of the directon of rotation, and in the direction of the applied force.

On take offs the load is greatest because the maximum amount of power is applied with increasing foward motion. The effects are counteracted when foward velocity increases and the rudder dampens or cancels this action.