NASA just published this video of the X-56A which flew with a flexible wing configuration at NASA’s Armstrong Flight Research Center in California on August 31.
The flight demonstrated that previous challenges present during takeoff and landing were resolved, and the revised flight controller and updated theoretical models provided stable and good handling qualities. X-56 research flights seek to demonstrate enabling advanced control technologies for active suppression of a destructive vibration known as flutter on aircraft with highly flexible, lightweight wings.
Source: YouTube