NASA and Boeing are pausing the development of the X-66 full-scale Sustainable Flight Demonstrator. Instead, they will re-focus their efforts on demonstrating the benefits of thin-wing technology.

NASA didn’t build this plane to look good, they built it to test an extreme idea. One wing swept forward, the other back, ...

Boeing and NASA will pause work on a new, experimental aircraft design meant to deliver more sustainable options for the future of aviation. The aircraft project — called the X-66A Sustainable Flight ...