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Modeling and Simulation of a Helicopter Slung Load Stabilization DeviceThis paper addresses the problem of simulation and stabilization of the yaw motions of a cargo container slung load. The study configuration is a UH-60 helicopter carrying a 6ft x 6 ft x 8 ft CONEX container. This load is limited to 60 KIAS in operations and flight testing indicates that it starts spinning in hover and that spin rate increases with airspeed. The simulation reproduced the load yaw motions seen in the flight data after augmenting the load model with terms representing unsteady load yaw moment effects acting to reinforce load oscillations, and augmenting the hook model to include yaw resistance at the hook. The use of a vertical fin to stabilize the load is considered. Results indicate that the CONEX airspeed can be extended to 110 kts using a 3x5 ft fin.
Document ID
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Cicolani, Luigi S.
(NASA Ames Research Center Moffett Field, CA, United States)
Ehlers, George E.
(Naval Postgraduate School Monterey, CA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2002
Subject Category
Aircraft Design, Testing And Performance
Meeting Information
Meeting: American Helicopter Society 58th Annual Forum
Location: Montreal
Country: Canada
Start Date: June 11, 2002
End Date: June 13, 2002
Sponsors: American Helicopter Society, Inc.
Funding Number(s)
PROJECT: RTOP 712-30-22
Distribution Limits
Work of the US Gov. Public Use Permitted.
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