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Helicopter flight characteristics in icing conditions

Published online by Cambridge University Press:  27 January 2016

Yihua Cao ,
Guozhi Li  and
R. A. Hess
Yihua Cao*
Affiliation:
Department of Aircraft Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China
Guozhi Li
Affiliation:
Department of Aircraft Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China
R. A. Hess
Affiliation:
Department of Mechanical and Aerospace Engineering, University of California, Davis, California, USA
*
yihuacs@yahoo.com.cn
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Abstract

A method to predict the effects of rotor icing on the flight characteristics of a UH-60A helicopter is presented. By considering both natural ice shedding and different types of ice accretion due to local temperature variations on the blade surface, an improved rotor icing model was developed. Next, the effects of icing on rotor force, torque and flapping were incorporated in a nonlinear helicopter dynamic model. Based upon icing design envelopes in cumuliform clouds, trim and stability characteristics were studied. Further development of the helicopter state-space model allowed control and handling qualities characteristics to be investigated with variation of the three icing-related cloud variables (atmospheric temperature, liquid water content, and median volumetric diameter). Results indicated that this method of evaluating rotorcraft icing is both feasible and useful.

Type
Research Article
Information
The Aeronautical Journal , Volume 116 , Issue 1183 , September 2012 , pp. 963 - 979
Copyright
Copyright © Royal Aeronautical Society 2012 

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