Derived in part from old cooking oil, the special fuel powered one of the A380's four engines.
, an associate professor of mechanical and aerospace engineering at the University of Dayton, says that “there’s interest from industry to move to the fuel that Airbus tested for this flight.”
However, he says that questions remain about using this type of SAF in the 100-percent form, as opposed to a blend of it with the regular kerosene. The first concern he has is about how compatible it is with the materials in the aircraft, as it could potentially impact seals, or o-rings, in the system, and cause leaks.
The second is the potential for the fuel to affect the way the aircraft measures the quantity of the fuel in the tanks, since it could have a different density compared to traditional jet fuel. Le Moing, of Airbus, says that this second issue has been on their radar. “One of the topics that we explore is the behavior of the gauging system,” he says.
The reason that companies like Airbus are interested in sustainable aviation fuels is because they represent one way to make the industry greener, and ideally contribute less to climate change. Sustainable aviation fuels are a complex topic——but they should have less of a carbon footprint than the regular stuff when considering their whole lifecycle. Heyne says that the HEFA fuels also produce less soot and are less likely to create contrails, too.
Besides this Airbus test in the A380 and its other tests last year, other companies have tested out using sustainable aviation fuel. For example, UnitedAirbus even has plans to use an A380 toHeyne says that the aviation industry is interested in the HEFA-type sustainable aviation fuels that Airbus tested, but he notes that supply availability could be a challenge.
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