Woodward, Inc has been selected to provide rotary actuation solutions for the NASA and Boeing Transonic Truss-braced Wing (TTBW) X-66A aircraft demonstrator, while Safran Electrical & Power will provide the electrical power generation system

The pioneering aircraft concept incorporates very long and thin strut-braced wings to add lift and reduce drag, with potential to dramatically increase fuel efficiency. The rotary actuators will be fitted to the X-66A ailerons, one of the flight control surfaces on the aircraft’s special wings.

“We’re quite honored to be selected by Boeing for this breakthrough project, because it provides us with another chance to continue our work with industry leaders and bring our engineering expertise to the future of flight,” says Chip Blankenship, Chair and CEO of Woodward. “It is a natural next step for us to develop the next generation of rotary actuation, as it aligns to our passion for innovation and our purpose to design and deliver energy control solutions our partners count on to power a clean future.”

Woodward has been a long-time provider of propulsion, actuation, and aircraft control solutions to Boeing and also works with NASA on several projects. The Transonic Truss-Braced Wing program contributes to the aviation industry’s efforts to reach net-zero emissions by 2050.

Woodward has begun work with Boeing and plans to produce the actuators by 2026.

Safran Electrical & Power will also support ground and flight tests, slated to start in 2028.

This electrical power generation system consists of a variable frequency generator and its associated control unit, integrating the most advanced technologies developed by Safran Electrical & Power. It has been adapted to integrate directly on the Pratt & Whitney GTF engine and provides more than 100kW of electrical power. This modern system features an unmatched weight and efficiency, and enables a reduction in hydro-mechanical losses of close to 50%, resulting in significant fuel burn and carbon emission savings.

"We are very honored to further expand our thriving partnership with Boeing under this NASA program, and to develop breakthrough technologies for the Sustainable Flight Demonstrator. Safran Electrical & Power is thrilled to be collaborating with Boeing, NASA and other industry partners to drive innovations and to embrace latest advancements in technologies aiming to achieve our industry-wide goal of zero-emissions,” says Bruno Bellanger, executive vice president of Power division at Safran Electrical & Power.