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NASA GL-10 Tilt-Wing VTOL UAS Flight Validation ExperimentsGreased Lightning (GL-10) is an aircraft configuration that combines the characteristics of a cruise efficient airplane with the ability to perform vertical takeoffs and landings (VTOL). This presentation will summarize the results of the flight test experiments. Two key technologies have been utilized in this aircraft design. Namely, distributed electric propulsion and closed loop control laws to be able to fly an inherently unstable aircraft. For many decades we as an aviation industry have been attempting to build a vehicle that can combine the speed and efficiency of an airplane with the vertical takeoff and landing of a rotorcraft. Overall it has been determined thru flight test that a design that leverages these new technologies can yield a useful VTOL cruise efficient aircraft.
Document ID
Acquisition Source
Langley Research Center
Document Type
Fredericks, William J.
(NASA Langley Research Center Hampton, VA, United States)
North, David D.
(NASA Langley Research Center Hampton, VA, United States)
Agate, Mark A.
(NASA Langley Research Center Hampton, VA, United States)
Johns, Zachary R.
(National Inst. of Aerospace Hampton, VA, United States)
Date Acquired
May 24, 2016
Publication Date
June 22, 2015
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
Meeting Information
Meeting: AIAA Aviation 2015
Location: Dallas, TX
Country: United States
Start Date: June 22, 2015
End Date: June 26, 2015
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 533127.
Distribution Limits
Public Use Permitted.
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