- The combined effect of form drag and skin friction. It is total drag less induced drag. It is a type of parasite drag that increases as the square of speed and is dependent on the shape of the body and its smoothness. See also form drag and skin friction.Streamlining reduces profile drag substantial.
Aviation dictionary. 2014.
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profile drag — noun aeronautics : the portion of the wing drag that is due to friction and turbulence in the fluid and that would be absent if it were nonviscous * * * profile drag, Aeronautics. the part of the drag of an airfoil resulting from its shape and… … Useful english dictionary
profile drag — /ˈproʊfaɪl dræg/ (say prohfuyl drag) noun Aerodynamics the drag of a body, excluding that due to lift, comprising the sum of the form drag (which depends on the shape of the body) and the skin friction (which depends on the nature of its… … Australian English dictionary
profile-drag power loss — That portion of power expended in overcoming the total profile drag of propeller blades … Aviation dictionary
effective profile drag — The difference between the total wing drag and the induced drag of a wing with the same aspect ratio but elliptically loaded. Profile drag is the combined effect of form drag and skin friction and which increases as square of the speed and is… … Aviation dictionary
drag index — The profile drag at 100 ft/s divided by total wetted area … Aviation dictionary
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Drag-resistant aerospike — Trident I first launch on 18 January 1977 at Cape Canaveral. The thin antenna like structure mounted on the nose cone is the aerospike, which is composed of 2 parts. 1) The Extensible Boom is the long, slender, slightly tapered cylindrical… … Wikipedia
profile power — The power required overcoming the air friction drag of the individual blade elements. It is the power required to maintain a given helicopter rotor RPM when the collective is at its minimum setting and to overcome the drag associated with… … Aviation dictionary
Parasitic drag — (also called parasite drag) is drag caused by moving a solid object through a fluid. Parasitic drag is made up of many components, the most prominent being form drag. Skin friction and interference drag are also major components of parasitic drag … Wikipedia
Lift-to-drag ratio — In aerodynamics, the lift to drag ratio, or L/D ratio ( ell over dee in the US, ell dee in the UK), is the amount of lift generated by a wing or vehicle, divided by the drag it creates by moving through the air. A higher or more favorable L/D… … Wikipedia