Bell 525 Relentless Test Flights Now Running On Sustainable Fuels

Photo: Bell
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Key Takeaways:

  • Bell Textron completed its first sustainable aviation fuel (SAF)-powered flight with the developmental Bell 525 Relentless helicopter, following its initial SAF integration into its training fleet in March.
  • This achievement is a major step in Bell's sustainability journey, contributing to Textron’s Achieve 2025 initiative to reduce overall greenhouse gas emissions by 20 percent.
  • Avfuel supplies the SAF, making Bell its first rotorcraft customer to complete SAF flights, with each truckload anticipated to reduce lifecycle carbon emissions by 22 metric tons.
  • The Bell 525 Relentless is designed for fuel efficiency in long-range missions, and Bell plans to continue using SAF for its ongoing test flights when supply and schedules allow.
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Bell Textron first incorporated sustainable aviation fuel (SAF) with its training and demonstration fleet in March, and today announced it made the first SAF-powered flight of its developmental Bell 525 Relentless helicopter over the past summer.

Michael Thacker, executive vice-president of Innovation and Commercial Business, said, “This is a major milestone in our sustainability journey, and we look forward to implementing more carbon-emission-reduction practices in the future.” Textron’s Achieve 2025 initiative aims to reduce the company’s greenhouse gas emissions by 20 percent, overall, by 2025.

Aviation fuel supplier Avfuel provides SAF for Bell, which is the first “rotorcraft customer” to complete flights with SAF, according to Bell, which said, “Once blended, Avfuel anticipates a 22-metric-ton reduction in lifecycle carbon emissions per truckload.”

The Bell 525 Relentless is designed for long-range missions, including servicing oil and gas rigs, and offers “a significant reduction in fuel consumption compared to other large twin-engine aircraft commonly used for offshore operations,” said Bell. The company further said it will continue using SAF for its Bell 525 test flights “when SAF availability and flight test schedules allow.” The program is currently undergoing FAA Type Inspection Authorization (TIA) flight testing.

Mark Phelps

Mark Phelps is a senior editor at AVweb. He is an instrument rated private pilot and former owner of a Grumman American AA1B and a V-tail Bonanza.
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