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Williams Completes Flight Test Burning 100 Percent Sustainable Fuel

The Williams International FJ44-4A on the company’s testbed aircraft successfully completed flight testing using 100 percent SAF. Williams International
Gemini Sparkle

Key Takeaways:

  • Williams International successfully completed a 3.5-hour flight test of its FJ44-4 engine operating on 100 percent Sustainable Aviation Fuel (SAF).
  • The engine performed flawlessly, demonstrating full compatibility and durability with SAF, thus validating its performance.
  • This milestone is a significant step in Williams' initiative to decarbonize aviation, highlighting the potential for 100 percent SAF to help the industry achieve carbon-neutral goals.
  • A critical next step for wider adoption is accelerating the production of SAF to make it more widely available and affordable.
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Williams International recently completed a successful flight test of its FJ44-4 engine using 100 percent sustainable aviation fuel (SAF) on their flying testbed aircraft. The flight was conducted from the Williams International flight operations center in Pontiac, Michigan, and flew to points in northern Michigan with a total of 3.5 hours of flight time at a cruising altitude of FL450. This flight test follows extensive material compatibility and endurance testing that validated engine performance and durability using 100 percent SAF.

Dan Pimentel

Dan Pimentel is an instrument-rated private pilot and former airplane owner who has been flying since 1996. As an aviation journalist and photographer, he has covered all aspects of the general and business aviation communities for a long list of major aviation magazines, newspapers and websites. He has never met a flying machine that he didn’t like, and has written about his love of aviation for years on his Airplanista blog. For 10 years until 2019, he hosted the popular ‘Oshbash’ social media meetup events at EAA AirVenture Oshkosh.

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