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Old May 09, 2012, 04:41 PM
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The reflexed profiles used in flying wings rely on low pressure on the lower portion of the trailing edge to counteract the wing pitching moment. this means that the air leaving the trailing edge is deflected upward, though the frontal portion of the wing will act like any other section. Essentially the wing will draw the freestream upward, bend it downward as it goes over the wing, then give it a small kick upward to avoid pitching down. Overall, the air that gets disturbed stays on average in the same place, like for a normal wing section. you can play with the system boundaries to get the force vectors on the wing basing yourself only on reaction, or basing yourself only on pressure differences... the interaction between all these things is complex, there is no one single reason why lift is "made". Lift is the result of an interplay of several things all influencing each other in a complex system, and you can only really measure how these items interoperate, and try to predict their behaviour.
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