Sustainability and Environment
RTX To Supply Engines and Nacelles for X-66A Demonstrator
Boeing appoints Pratt & Whitney and Collins as suppliers for NASA's Sustainable Flight Demonstrator
Boeing's X-66A testbed aircraft for NASA's Sustainable Flight Demonstrator program.
Boeing's X-66A technology demonstrator aircraft will feature Pratt & Whitney's Geared Turbofan engines and nacelles from its RTX group sibling Collins Aerospace. (Image: Boeing)

Boeing has enlisted Pratt & Whitney and Collins Aerospace as key partners in the development of the X-66A aircraft for NASA’s Sustainable Flight Demonstrator project. The two RTX group companies will, respectively, supply Geared Turbofan engines and nacelles and engine accessories, under an agreement announced on Tuesday.

The X-66A airframe features a transonic truss-braced wing with extra-long, thin wings attached to the fuselage with diagonal struts. The Sustainable Flight Demonstrator project has attracted $425 million in funding from the U.S. Aviation Climate Action Plan, as well as some $725 million from Boeing and its partners.