Based on a heavily modified McDonnell Douglas MD-90, the X-66 was intended to demonstrate a truss-braced version of the thin wing at full scale. The experimental aircraft formed the flagship of NASA’s ...

Transonic truss-braced wing project is on hold after Boeing proposes to investigate a simpler, thin-wing design.

Boeing this summer will stop developing NASA's X-66 truss-braced-wing demonstrator aircraft and shift its focus specifically ...

Learn more about Boeing's proposal to redirect the focus of NASA’s Sustainable Flight Demonstrator project to long, thin-wing ...

The X-66 program heavily modified a McDonnell Douglas MD-90 aircraft to demonstrate a truss-braced version of the thin wing.

Boeing and NASA are to pause development of the X-66 flight demonstrator to focus their research on the evolution of long, ...

Boeing and NASA will pause work on the X-66 Sustainable Flight Demonstrator, an experimental plane design featuring long, ...

Boeing (BA) will pause development of its X-66 Sustainable Flight Demonstrator and redeploy some of the engineers on the program to the 777X ...