Publication:
Modeling and Simulation of a Helicopter Slung Load Stabilization Device

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Authors
Cicolani, Luigi S.
Ehlers, George E.
Subjects
MATHEMATICAL MODELS
AERODYNAMIC LOADS
FLIGHT TESTS
H-60 HELICOPTER
COMPUTERIZED SIMULATION
AERODYNAMIC CONFIGURATIONS
STABILITY
AIRSPEED
YAW
CONTAINERS
STEADY STATE
DAMPING
CARGO
ROLLING MOMENTS
Advisors
Date of Issue
2002-01
Date
Jan 01, 2002
Publisher
Language
Abstract
This 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.
Type
Preprint
Description
American Helicopter Society 58th Annual Forum; 11-13 Jun. 2002; Montreal; Canada
Series/Report No
Department
Other Units
Ames Research Center
Identifiers
NPS Report Number
Sponsors
Funder
RTOP 712-30-22
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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