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Artist illustration of the Boeing X-66 flying above the clouds.
Artist illustration of an aerial 3/4 rear view of Boeing's X-66 climbing into the blue skies.
Artist illustration of the X-66 in flight above the clouds with the sun in the background.

Sustainable Flight Demonstrator Project

The purpose of the Sustainable Flight Demonstrator (SFD) project is to engage with industry, academia, and other government organizations to identify, select, and mature key airframe technologies – such as new wing designs – that have a high probability of transition to the next generation single-aisle seat class airliner. The centerpiece of the project is the X-66, an experimental demonstrator aircraft that will be produced under a partnership between NASA and the Boeing Company.

Learn More About the SFD Project about Sustainable Flight Demonstrator Project

project manager

Brent Cobleigh

Deputy Project Manager

Sarah Waechter

Chief Engineer

Clint St. John

Lead Systems Engineer

Rich DeLoof

Sustainable Flight National Partnership

NASA Aeronautics is engaging with industry, academia, and other agencies through our Sustainable Flight National Partnership (SFNP) to accomplish the aviation community’s goal of net-zero carbon emissions by 2050.

Learn More About the SFNP about Sustainable Flight National Partnership
Illustration of three futuristic concept aircraft in flight.