Supporting Surfaces: The lifting surfaces of an aeroplane or glider.
Surface Friction Drag: The drag caused by the actual contact of the air flowing over a body with the surface of that body.
-The main supporting surfaces of an airplane are called wings, although the terms planes and panels are probably as frequently used and even preferred by many.
The stability of these Iittle projectiles is quite good fore-and-aft, because the supporting surfaces increase in area while the intensity of the pressures diminish toward the rear, but the power required is great, ...
 See also: Flight, Propeller, Plane, Power, Gravity
  
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