Upside down can be right side up. That's what NASA researchers determined for tests of an efficient wing concept that could be part of the agency's answer to making future aircraft sustainable.

Bracing is required to make a high-aspect ratio wing work on an airliner. Credit: NASA For a glider ... Boeing may explore the use of folding wingtips. These have already been used successfully ...

The rear passenger served as the Radio Intercept Officer (or RIO) and had no control over the Tomcat's iconic folding wings ... to utilize the sweep wing concept, with NASA having used it in ...

The National Aeronautics and Space Association (NASA) and the National Oceanic ... Once in orbit, the panels will fold out on a single array wing that will rotate once per day, continuously ...