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Experimental determination of airplane mass and inertial characteristicsCurrent practices are evaluated for experimentally determining airplane center of gravity, moments of inertia, and products of inertia. The techniques discussed are applicable to bodies other than airplanes. In pitching- and rolling-moment-of-inertia investigations with the airplane mounted on and pivoted about knife edges, the nonlinear spring moments that occur at large amplitudes of oscillation can be eliminated by using the proper spring configuration. The single-point suspension double-pendulum technique for obtaining yawing moments of inertia, products of inertia, and the inclination of the principal axis provides accurate results from yaw-mode oscillation data, provided that the sway-mode effects are minimized by proper suspension rig design. Rocking-mode effects in the data can be isolated.
Document ID
19750001990
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Report (TR)
Authors
Wolowicz, C. H.
(NASA Flight Research Center Edwards, CA, United States)
Yancey, R. B.
(NASA Flight Research Center Edwards, CA, United States)
Date Acquired
September 3, 2013
Publication Date
October 1, 1974
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
H-814
NASA-TR-R-433
Accession Number
75N10062
Funding Number(s)
PROJECT: RTOP 501-06-05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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