German aircraft manufacturer Deutsche Aircraft has successfully operated the first test flight using 100% synthetic zero aromatics fuel in both engines of the D328 ‘UpLift’ flying testbed. This is the first time a CS-25 aircraft has operated solely on a fuel that is chemically identical to Power-to-Liquid fuel (PtL). The flight, which was conducted at Oberpfaffenhofen Airport on 9 October 2024, is the starting point of the inflight emission measurement campaign, which will investigate the benefits of using 100% zero aromatics PtL to reduce climate impact. PtL can be produced using sustainable CO2, renewable energy and water in the future, offering the potential to reduce the CO2 balance by up to 95% as well as decreasing non-CO2 effects.
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The synthetic fuel is supplied by Sasol, a leading South African chemical company, that has mastered the Fischer-Tropsch process on an industrial scale. While the currently used fuel is not yet produced from sustainable feedstock (hence being called “PtL-proxy”), Power-to-Liquid fuels, or e-kerosene, have the potential to facilitate aviation’s transition to climate neutrality in the long term, as their production is not constrained by feedstock scarcity. In addition to reducing the CO2 footprint, the absence of aromatics can significantly reduce the warming effect of contrails and will improve the air quality at airports.
Nico Neumann, Chief Operations Officer at Deutsche Aircraft, remarks: “This achievement not only underscores the potential of synthetic fuels but also highlights the significance of the collaboration between industry and research institutions and the support from the German government in driving meaningful change and contributing to the global aviation value chain.”
Regina Pouzolz, Director Sustainable Flight at Deutsche Aircraft, adds: “We want the D328eco to be compatible with zero aromatics PtL produced from renewable and sustainable resources, in addition to any other fuel choice of our customers around the world. I would like to thank the DLR and our fantastic team for their efforts and spirit of collaboration to make this flight happen.
“Sustainable fuels will play an important role in climate-friendly aviation in the future, especially electricity-based fuels for widespread production,” explains Dr. Markus Fischer, DLR Executive Board Member for Aeronautics. “I am therefore particularly pleased that our new D328 UpLift research aircraft is the first in the world to fly with such a synthetic aromatics-free fuel in its turboprop engines on its research campaign premiere. With our ‘flying laboratory’ Falcon 20E, we are contributing DLR’s outstanding expertise in measuring emissions and the resulting contrails directly in flight.”
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