Larger and more powerful engines are making flying more efficient. These gigantic main engines take up more space on the wings of modern passenger aircraft. However, they influence the flow over the ...

In this historic 1946 photo from the U.S. space agency, a semispan airplane model and flow-direction vane mounted on wing of P-51D airplane for transonic tests by wing-flow method. The National ...

It's common to see line-shaped clouds in the sky, known as contrails, trailing behind the engines of a jet airplane. What's not always visible is a vortex coming off of the tip of each wing--like two ...