
The GL-10 (aka Greased Lightning) is a NASA prototype, which can fly like a plane, but take-off in hover mode -- similar to how a helicopter gets airborne.

Engineers David North (L) and Bill Fredericks (R) from NASA's Langley Research Center in Hampton, Virginia, carry the Greased Lightning ahead of a test flight.

The NASA prototype has successfully transitioned from hover to wing-borne flight during several experiments.

It uses similar technology to the U.S. military MV-22 Osprey, but in the GL-10 the whole wing rotates, rather than just the engine.

NASA has a history of exploring drone technology. Pictured a NASA Global Hawk UAV in 2013, which was tasked with monitoring tropical storms and hurricanes.

NASA is also working with a group of researchers to create a bio-drone that can self-destruct and leave no trace if it crashes. Real life applications include being able to fly into environmentally sensitive areas (like coral reefs), according to NASA.



