312. A Simplified Technique for Precision Measurement of Moment of Inertia

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Paper

R L Robertson, E C Harris: 312. A Simplified Technique for Precision Measurement of Moment of Inertia. 1962.

 

Abstract

This paper was presented at the Twenty-first Annual National Conference of the Society of Aeronautical Weight Engineers at Seattle, Washington, May 14-17, 1962. The method for determining the mass MOI (moment of inertia) discussed in this paper was developed by the Missile and Space Systems Division of Douglas Aircraft Co., Inc., for use on the Skybolt weapon system. The attractiveness of this method lies in its simplicity and accuracy.
a. Simplified equations allow determination of the vehicle mass MOI about the axis of rotation without the measurement of either its mass or its center of gravity. The only variable in the equation is time.
b. The technique minimizes ground handling problems by permitting measurements of the vehicle and its major components in their normal (horizontal) handling position.
c. An accurate MOI about the center of gravity can be determined because of the small MOI transfer term inherent in this system.

 

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