This paper deals with the scope of the borderline field between aerodynamics and physics, which has become known as aerophysics. It emphasizes the desirability of utilization of ballistics ranges for aerophysics investigation. In this connection, it reviews in outline form the history of ballistics: the age of speculative ballistics, the age of geometrical ballistics, the age of physical ballistics. Examples of aerophysical research are cited from aeroballistics (high speed gas flows) investigations conducted at the Naval Ordnance Laboratory, White Oak, Maryland.

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