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Which of the following is correct?(a) D = q*S*CD(b) D = q*S*CD*ρ(c) D = q*CD(d) D = qI have been asked this question in my homework.The origin of the question is Aerodynamic Coefficients in division Aerodynamics of Aircraft Design

Answer»

Right choice is (a) D = q*S*CD

To EXPLAIN: Above equation is a general equation of drag force. Drag on an aircraft or any other object depends on NUMBER of factors such as local dynamic PRESSURE q, area S etc. A TYPICAL value of drag can be GIVEN as, Drag D = q*S*CD where, CD = drag coefficient.



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