Space History Photo: XV-8A Fleep Prototype
An image of a flexible wing aircraft prototype known as a Fleep.
Credit: NASA.

In this historical photo from the U.S. space agency, a full scale of XV-8A Fleep prototype, a flexible wing aircraft built by Ryan, was flown in the Full Scale Tunnel.

Each weekday, SPACE.com looks back at the history of spaceflight through photos (archive).