Themes > Science > Physics > Fluid Dynamics > Flying the flag for fluid dynamics > Aerodynamics > Selected Topics of Model Aerodynamics > A Close Look at Winglets > And the Big Guys?

If we look at full scale aircraft with large winglets, we see, that most of them have shifted the winglet downstream, either by reducing the chord length at the root of the winglet (VFW, NASA) or by moving the complete winglet downstream (Voyager). If possible, they add a curved fairing between wing and winglet. The sweep of the NASA and VFW winglets is necessary due to the higher flight Mach numbers, for a model airplane no sweep is needed (only to please your eyes). Also, the dihedral of the winglet is of minor importance as is the small forward winglet-let pointing downward.

A NASA Winglet. A Winglet by VFW (Germany)
The Winglet of Rutans Voyager.


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