Heavy-Fuel Engine For Gray Eagle

EAGLE FUEL: General Atomics Aeronautical Systems has received a $13.5 million U.S. Army contract to upgrade a Gray Eagle Block 0 unmanned aircraft with an alternate heavy-fuel engine. A 2.0-liter Lycoming engine will be flight tested in place of the 1.7-liter Centurion (formerly Thielert) turbo...

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