Transonic Truss-Braced Wing (TTBW) technology demonstrator is one of the most promising projects to make commercial jets more efficient. According to Air Current, the company is transferring several engineers to support 737 MAX and 777X programs

Former McDonnell Douglas commercial jet that flew in China and on Delta Airlines will be converted into a prototype that will test a configuration capable of generating a 30% reduction in fuel consumption

Designated X-66A, the demonstrator will test the Transonic Truss-Braced Wing configuration, capable of offering 30% less fuel consumption than a 737. First flight should take place in 2028