[Flightgear-users] Wingtip Vortices

[N Stolley]

I'm an inflight refueler on the KC-10. The window looking behind the  
airplane gives me a unique view when we're drawing contrails. When  
they're just right, not too thick, not too thin, you can see the  
wingtip vortices from a viewpoint directly in front of them. Have a  
look. I have also been behind and underneath other aircraft at the  
mid to upper flight levels (~FL340). Fairly close behind the jet, you  
can make out tight little tornadoes inside of the contrails. You can  
actually see the rotation. As they get further away from the  
airplane, the vortices completely consume the contrail. You can see  
this from the ground when a 747 is flying over. I'll try to get some  
pictures.

http://home.comcast.net/~airplaneit/vortices.avi
-Nick

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