Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure
Aerodynamic characteristics. : A Comparative Analysis of Internal and External Solutions to Provide Air Combat Maneuvering Instrumentation Functionality
Aerodynamic heating -- Congresses : Heat transfer and spacecraft thermal control Technical papers selected from the AIAA 8th Aerospace Sciences Meeting, January 1970, and the AIAA 5th Thermophysics Conference, June-July 1970, subsequently rev. for this vol. Edited by John W. Lucas
Here are entered works on the testing of objects in wind tunnels to determine the objects' aerodynamic characteristics. Works on the testing of wind tunnels to determine the tunnels' performance characteristics are entered under the heading Wind tunnels--Testing