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JulianEdgar · 06-06-2020, 08:14 PM

I like the tip feathers of birds that make use of the wingtip vortices to create thrust. There's an intriguing mention of it in one of the aircraft aero books I have.

06-06-2020, 08:14 PM	#3444 (permalink)
JulianEdgar Banned Join Date: Nov 2017 Location: Australia Posts: 2,060 Thanks: 107 Thanked 1,605 Times in 1,136 Posts	I like the tip feathers of birds that make use of the wingtip vortices to create thrust. There's an intriguing mention of it in one of the aircraft aero books I have.