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Boeing, NASA, United Airlines to test SAF benefits with air-to-air flights

Download: Printable PDF Date: 14 Oct 2023 18:26 (UTC) categories:
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Boeing, NASA, United Airlines to test SAF benefits with air-to-air flights - Airlines publisher
Dana Ermolenko
Country: United States Aircraft: Airplanes Airline: United

Boeing partners NASA and United Airlines for in-flight testing to measure how sustainable aviation fuel affects contrails and non-carbon emissions, in addition to reducing the fuel's life cycle climate impact. Boeing second ecoDemonstrator Explorer, a 737-10 destined for United Airlines, will fly with 100% SAF and conventional jet fuel in separate tanks and alternate fuels during testing. NASA's DC-8 Airborne Science Lab will fly behind the commercial jet and measure emissions produced by each type of fuel and contrail ice particles. NASA satellites will capture images of contrail formation as part of the testing.

The researchers aim to understand how advanced fuels, engine combustor designs and other technologies may reduce atmospheric warming. For example, tests will assess how SAF affects the characteristics of contrails, the persistent condensation trails produced when airplanes fly through cold, humid air. While their full impact is not yet understood, some research has suggested certain contrails can trap heat in the atmosphere.

World Energy is supplying SAF for the tests from its Paramount, Calif., facility. Additional support includes:

  • U.S. Federal Aviation Administration is providing funding through the ASCENT Center of Excellence
  • GE Aerospace is providing technical expertise and project funding
  • German Aerospace Center is providing experts and instrumentation 

The project is the latest phase in a multi-year partnership between Boeing and NASA to analyze how SAF can reduce emissions and enable other environmental benefits. Compared to conventional jet fuel, SAF – made from a range of sustainably produced feedstocks – can reduce emissions by up to 85% over the fuel's life cycle and offers the greatest potential to reduce aviation CO2 over the next 30 years. SAF also produces less soot which can improve air quality near airports.

Boeing Chief Sustainability Officer Chris Raymond, commented: "We are honored to collaborate with NASA, United Airlines, and other valued partners on research that will strengthen the industry's understanding of the benefits of SAF beyond reducing carbon emissions. We've solved hard problems before, and if we continue to take meaningful actions, I'm confident we'll achieve a more sustainable aerospace future, together."

Rich Wahls, NASA mission integration manager for the Sustainable Flight National Partnership, stated: "Flight testing is complex and resource-intensive, yet it's the gold standard for understanding how sustainable aerospace innovations affect changes in contrails and climate," This is why we're bringing NASA's DC-8 to bear on this collaboration, where the valuable flight data will improve our predictive models."

United Chief Sustainability Officer Lauren Riley, said: "This collaboration between Boeing, NASA and United has the potential to not only help us better understand contrails but to provide the full scope of what our transition to SAF can provide beyond greenhouse-gas reductions."

GE Aerospace Vice President of Engineering Mohamed Ali, said: "We at GE Aerospace proudly support this groundbreaking research collaboration that will deepen our scientific understanding of the impact of SAF on emissions for a more sustainable future of flight." 

Markus Fischer, DLR Divisional Board Member for Aeronautics, stated: "To achieve climate-compatible aviation, we need close international cooperation. The German Aerospace Center has decades of experience in research on the climate impact of the entire aviation system by advancing measurement technology and simulations. The continuation of transatlantic cooperation now finds a new summit and underlines the international commitment to reduce the climate impact from aviation's CO2 and non-CO2 effects." 

The Boeing ecoDemonstrator program was expanded this year to include Explorer airplanes focused on short-term, specific test projects. Boeing and NASA conducted SAF emissions ground testing on an Alaska Airlines 737-9 in 2021and ecoDemonstrator 777-200ER and 787-10 flight-test jets in 2022. Boeing has committed to deliver commercial airplanes compatible with 100% SAF by 2030. The 737-10 is the largest airplane in Boeing's single-aisle 737 MAX family, which reduces fuel use and emissions by 20% compared to airplanes it replaces.

 



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