They could boost the performance of aircraft, too. Lining aircraft wings with rows of lightweight flaps that mimic covert feathers can increase lift, reduce drag and prevent stall, researchers ...
Left to right: Ahmed K. Othman, Girguis Sedky, Hannah Wiswell and professor Aimy Wissa. (Photo by Lori M. Nichols) Inspired by bird feathers called covert feathers, researchers at the University of ...
So you were driving behind a semi truck in slow traffic the other day and noticed something peculiar at the top of its tall exhaust stacks: small metal flaps that flip open with each rev of the engine ...