23-03-2020, 04:10 PM
Drag is produced by an object trying to penetrate wind speed. Typically FRONTAL AREA v`s WIND SPEED. The greater of either or collectively--- the greater is the power required for penetration to windward. It is therefore reason to assume that parasitic drag and induced drag can be attributed to any proturbances added- that effect the smooth passage of the air stream over the object. AIRCRAFT have the addition of undercarriage ,motor/muffler combo. dowel for mounting the wing, gaps at the control surface hinge points. Wing tips create turbulence . ie.---A spiral vertex from each wing tip and stab/rudder is produced..
Brian C
Brian C