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the vortices roll up tightly into so-called tip vortices. These tip vort,ices remain
in fiuid medium for some time before getti:g dissipated because of viscosit)r and
ambient turbulence. For the time duration when these tip vortices exist, they can
create significant hazards to the aircraft that fiy into this area unaware of/their
existence.
REVIEW OF BASIC AERODYNAMIC PRINCfPLES                33
                                                   Lower Surface
a) Crossflow around wing tips
                                                 
                                                 
                                                 
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