A "'glider "'is a heavier-than-air aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does not depend on an engine.
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The type of flying could be referred to as'on the prop'as opposed to'on the wing', which would describe more conventional flight patterns that make more use of the lifting surfaces of the plane.
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In the original tail assembly the upper surface was a lifting surface, while the lower was a non-lifting surface intended to act as a stabiliser : in the new arrangement both surfaces contributed lift.
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In the original tail assembly the upper surface was a lifting surface, while the lower was a non-lifting surface intended to act as a stabiliser : in the new arrangement both surfaces contributed lift.
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The term " winglet " was previously used to describe an additional lifting surface on an aircraft, " e . g . ", a short section between wheels on fixed undercarriage . close hauled.
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Canards can also be analyzed in Digital DATCOM . The canard must be specified as the forward lifting surface ( i . e . wing ) and the wing as the aft lift surface.
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Another approach proposes a tailsitter configuration in which the lifting surfaces act as a rotors during takeoff, the craft tilts over for horizontal flight and the rotor stops to act as a fixed wing.
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:: A major breakthrough was the discovery that in the transonic phase an effect called Mach tuck occurs, in which shock waves build up on the lifting surfaces causing the nose to plunge downwards.
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In this case the disk shape was not of itself a good lifting surface, as it was neutral in terms of lift direction that is, it would fly sideways as readily as it would fly forward.
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On the other side of the spectrum, they can describe the flow around a fairly complex aircraft geometry ( with multiple lifting surfaces with taper, kinks, twist, camber, trailing edge control surfaces and many other geometric features ).
