Precision Linear Flight.
HARRY DIAMOND LABS WASHINGTON D C
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An instrumentation system is described that enables a jet aircraft to maintain a linear high-angle dive path at constant speed. The density and motion of the air, as well as the mass, thrust, and drag configuration of the aircraft affect the performance of an aircraft diving toward a fixed point on the ground. Standard airborne instrumentation is insufficient to maintain a plus or minus one deg course and a plus or minus ten percent ground speed in a 30-deg dive. It was demonstrated in a series of test dives at various fixed angles that, by using ground based instrumentation, how these precisions could be attained over portions of the dive.