The Boeing 747 used for wingtip vortex research flights sits on the ramp at NASA's Flight Research Center in Edwards, California.
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The Boeing 747 used for wingtip vortex research flights sits on the ramp at NASA’s Flight Research Center in Edwards, California. Note the smoke generator mounted underneath the jet’s wing. Smoke from underwing smoke generators made it possible for researchers to actually see the vortices created by the 747’s wings in flight.October 24, 1979NASA Photo / › B-747 Project Description