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_______ is one of the sources of drag.(a) Viscous separation(b) Drafting(c) Signal strength(d) Lift onlyThis question was posed to me in an online quiz.This interesting question is from Aerodynamic Forces in chapter Aerodynamics of Aircraft Design

Answer»

Correct answer is (a) Viscous separation

The explanation is: Viscous separation is ONE of the major factor of the drag GENERATION. DRAFTING is concerned with DRAWING. Signal strength is affected by distance between SOURCE and target. Lift only is not source of drag. Lift is responsible for lift induced drag.



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