NASA and Boeing unveil the X-66A
NASA, in partnership with Boeing, introduced a new livery for the X-66A, part of its Sustainable Aviation Initiative. The X-66A is a flagship X aircraft dedicated to the US goal of achieving net-zero aviation greenhouse gas emissions, as stated in the US Aviation Climate Action Plan. Credit: Boeing
NASA and Boeing unveil the new design of the X-66A, an aircraft designed for sustainable aviation and net-zero greenhouse gas emissions, at EAA AirVenture Oshkosh.
NASA and Boeing have unveiled a new livery for the X-66A aircraft that will be produced through the agency’s Sustainable Aviation Program.
The X-66A is the first
The Sustainable Aviation project seeks to inform a potential new generation of more sustainable single-aisle aircraft – the backbone of passenger airlines around the world. Boeing will work with NASA to build, test and fly the X-66A, a full-scale experimental aircraft. The X-66A features very long, thin wings stabilized by diagonal struts, known as the Transonic Truss-Braced Wing concept.
NASA and Boeing unveiled the uniform at EAA AirVenture Oshkosh.

The X-66A is an X-plane specifically intended to help the United States achieve the goal of reducing greenhouse gas emissions to zero by 2050. To build the The fuselage, wings and engines were replaced. The resulting experimental aircraft will have long, thin wings with engines mounted underneath and a set of aerodynamic struts for support. The design, submitted by Boeing for NASA’s Sustainable Aviation Project, is known as the Transonic Truss-Braced Wing. Credit: NASA
The X-66A, an innovative aircraft created through NASA’s Sustainable Aviation Project in partnership with Boeing, aims to pave the way for more environmentally friendly single-aisle aircraft, which are essential for passenger airlines around the world. The standout feature of the X-66A is the Transonic Truss-Braced Wing design – very long wings held by diagonal struts. This aircraft plays an integral role in NASA’s commitment to aviation leadership and environmental conservation.
The primary goal of the X-66A is to advance efforts toward achieving net-zero aviation greenhouse gas emissions, consistent with the U.S. Aviation Climate Action Plan. Notably, the X-66A has the potential to consume up to 30% less fuel and produce significantly lower emissions compared to current top-tier aircraft. Since single-aisle aircraft are responsible for nearly half of global aviation emissions, the X-66A’s sustainable design can significantly reduce its carbon footprint.