Progress on the NASA X-66 Sustainable Flight Demonstrator

NASA is modifying a commercial jetliner to create the first iteration of the X-66, the Sustainable Flight Demonstrator.

A key modification to the MD-90 aircraft involves the removal of its original wings to test the Transonic Truss-Braced Wing (TTBW) design.


The TTBW features ultrathin wings braced by struts with larger spans and higher aspect ratios. This design enhances aerodynamic efficiency and widens the wingspan, potentially leading to significant reductions in fuel use and emissions.

With this project’s groundbreaking potential, it’s a thrilling time for the aviation sector as it strives to make flying more sustainable and environmentally friendly.

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