BASIC AERODYNAMICS - KSU

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weighed, it would be found to weigh about 14.7 lbs. Thus, atmospheric pressure at sea level is 14.7 PSI (pounds per square inch). However, pounds per square inch are rather a crude unit for the measurement of a light substance such as air. Therefore, atmospheric pressure is usually measured in terms of inches of mercury (Fig. 1-3

  Basics, Atmospheric, Aerodynamic, Basic aerodynamics