USN flew Group 2 UAV for 24 hours using solar and hydrogen energy

U.S. Naval Research Laboratory has demonstrated that its electric unmanned aerial vehicle dubbed Hybrid Tiger can stay airborne for 24 hours using multiple power sources.

U.S. Naval Research Laboratory engineers demonstrate Hybrid Tiger, an electric unmanned aerial vehicle with multi-day endurance flight capability at Aberdeen Proving Grounds in Maryland, Nov. 18. This was the first time Hybrid Tiger flew through a complete diurnal cycle, a 24-hour period of day and night, and its longest flight to date.

U.S. Navy photo by Jonathan Steffen

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