Planes over water

AIR FORCE PHOTOS

AFRL tests high-efficiency engine for unmanned aircraft

The Air Force Research Laboratory Advanced Power Technology Office’s high efficiency innovative aviation diesel engine is shown here in the Arnold Engineering Development Center T-11 Test Cell. The Graflight engine, developed by Engineered Propulsion Systems, could offer extended range and greater fuel options for unmanned aircraft missions. (Courtesy photo/AEDC)

PHOTO BY: Arnold Engineering and Development Complex
VIRIN: 170717-F-FX606-001.JPG
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