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With green mountains and a clear blue sky in the background, a man stands with his back to the camera as he waves a lime green flag. He is wearing a light blue shirt with long pants, a red vest, and a wide-brimmed hat. Another man, wearing dark shorts, a white t-shirt, a dark backpack, and a wide-brimmed hat stands off to the left. In front of the men is a large white aircraft with a center propeller and two cockpits on either side. Part of the aircraft’s name (Pipistrel-USA) is visible on the side in all-caps, with the NASA meatball logo near the center propeller.

Green Flight Challenge

Green Flight Challenge (2011) – A man waves a starting flag at the Charles M. Schulz Sonoma County Airport in Santa Rosa, California, signaling the Pipistrel-USA, Taurus G4 aircraft to take off. The goal of this challenge is to create cleaner, greener skies by innovating aircraft to use fewer emissions, more renewable fuels, and electricity for a more fuel-efficient flight.

Image Credit: NASA/Bill Ingalls
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Image CreditNASA/Bill Ingalls
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