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타이틀	WING TORSIONAL STIFFNESS TESTS OF THE ACTIVE AEROELASTIC WING F/A-18 AIRPLANE
저자	William A. Lokos, Candida D. Olney, Natalie D. Crawford, Rick Stauf and Eric Y. Reichenbach
Keyword	Ground load testing; Wing deflection measurement; Wing elastic twist; Wing flexibility; Wing torsional stiffness
URL	http://www.dfrc.nasa.gov/DTRS/2002/PDF/H-2481.pdf
보고서번호	NASA-TM-2002-210723
발행년도	2002
출처	NASA Dryden Flight Research Center
ABSTRACT	The left wing of the Active Aeroelastic Wing (AAW) F/A-18 airplane has been ground-load-tested to quantify its torsional stiffness. The test has been performed at the NASA Dryden Flight Research Center in November 1996, and again in April 2001 after a wing skin modification was performed. The primary objectives of these tests were to characterize the wing behavior before the first flight, and provide a before-and-after measurement of the torsional stiffness. Two streamwise load couples have been applied. The wing skin modification is shown to have more torsional flexibility than the original configuration has. Additionally, structural hysteresis is shown to be reduced by the skin modification. Data comparisons show good repeatability between the tests.