Estimation of loads and moments on a fully articulated helicopter rotor blade

Rajamohan, -- and Balasubramanian, TS (1975) Estimation of loads and moments on a fully articulated helicopter rotor blade. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

Equations and procedure have been developed and used for carrying out the numerical operations involved in computing the motion and loads of a hinged flexible lifting rotor. The blade motions considered include flapping and lagging.The leads evaluated are the aerodynamic loading,inertia forces,shear forces and the bending torsional moment roting on the blades.These procedure and be used for various flight configurations like harvering, forward flight and manpowers. The equations are general and can account for stall and compressibility effects,hinge offset reverse flow and other factors committed from conventional analytical rotor treatments. Alternatively approximate closed form selections were developed as a cross check.A computer program,based on the methods presented herein,was developed and applied to the evaluation of loads and moments on a proposed glass FRP blade for Alouette III helicopter which is currently under development at NAL The agreement between the various methods (that is numerical and analytical)were satisfactory and enhances the reliability of the equations and procedure developed.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: Articulated helicopter;Rotor blade
Subjects: ENGINEERING > Structural Mechanics
AERONAUTICS > Aeronautics (General)
Depositing User: M/S ICAST NAL
Date Deposited: 09 Nov 2006
Last Modified: 24 May 2010 04:22
URI: http://nal-ir.nal.res.in/id/eprint/3300

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