![](https://www.nasa.gov/wp-content/uploads/2023/04/microsoftteams-image-81.jpg?w=1024)
![Artist illustration of an aerial view of the Transonic Truss-Braced Wing aircraft in flight above a forest of green trees.](https://www.nasa.gov/wp-content/uploads/2022/09/ttbw-90-aerial-forest-16x9-2-no-logo.jpg?w=1024)
![A model representing half an airplane featuring a truss-braced wing, installed for testing in a wind tunnel](https://www.nasa.gov/wp-content/uploads/2022/03/acd22-0005-026.jpg?w=695)
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.
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.](https://www.nasa.gov/wp-content/uploads/2022/02/ttbw-and-bwb-v2-16x9-2.jpg?w=2048)