No abstract

No abstract

No abstract

Approved for public release; distribution unlimited. 17. DISTRIBUTION STATEMENT (ol lhe abef/enct entered In Block 20, il dltleremt Item RepotQ 18 SUPPLEMENTARY NOTES Available in Defense Technical Information Center (DTIC) 19. KEY WORDS (C~t~ue ~ reverie IJde it neceaea~ ~d I~nrl~ ~ block numbe~ dynamics attack aircraft mathematical models stability fighter bombers angle of attack aircraft simulation maneuverability motion mathematical analysis damping 20. ABSTRACT (Coil/nun oN reverie side |f nnceaeery amd fdentlly by block number) A six-degree-of-freedom, nonlinear dynamic derivative sensitivity study has been conducted on a fighter/bomber and an attack-type aircraft. The dynamic derivatives investigated in the study were C~q, Cnq, Cmp, Cm r, C~, and Cn~'. For the cross-coupling derivatives, C~q was shown to have the the most significant effect on level and-3-g turning flight motion, followed by Cnq and Cmp with FORM DD , JAN T3 1473 EO, TION OF , NOV SS IS OBSOLETS UNCLASSIFIED UNCLASSIFIED 20. ABSTRACT (Continued) the derivative Cmr showing little to negligible effect in the same regime. For the acceleration derivatives, C~ was shown to have a significant influence on the aircraft motion. The Cn~ derivative had little effect on the simulated motion. The analysis also documents the configuration dependency of the cross-coupling derivatives and investigates the effects of nonlinear variations in the derivatives on the aircraft motion.

When U. S. Government drawings, specifications, or other data are used for any purpose other than a dermitely related Government procurement operation, the Government thereby incurs no responsibility nor any obligation whatsoever, and the fact that the Government may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data, is not to be regarded by implication or otherwise, or in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto. Qualified users may obtain copies of this report from the Defense Documentation Center. References to named commerical products in this report are not to be considered in any sense as an indorsement of the product by the United States Air Force or the Government. This report has been reviewed by the Information Office (0I) and is releasable to the National Technical Information Service (NTIS). At NTIS, it will be available Io the general public, including foreign nations.