Accession Number : AD0744104

Title :   A Study of the Effects of Parameter Variation on the Flying Qualities of the XV-4B V/Stol Aircraft.

Descriptive Note : Technical rept., Oct 67-Oct 69,

Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Jones,Arthur G.

Report Date : MAR 1972

Pagination or Media Count : 133

Abstract : The dominating influence of the propulsion system on the dynamic motion of a V/STOL aircraft operating in the hover or low-velocity flight modes has greatly increased the difficulty of developing such an aircraft to be stable and controllable during these modes. Small variations in stability derivatives caused by either changes in the propulsive system or errors in measurement or analytical prediction programs have been shown to cause significant changes in the dynamic characteristics of such aircraft. To better understand relationships, a program was performed using the Lockheed XV-4B jet-lift aircraft as a subject configuration. During this program, the magnitudes of ten of the stability derivatives used to describe the aircraft were varied individually, and the change in the roots of the linearized, uncoupled equations of motion noted. (Author)

Descriptors :   (*SHORT TAKEOFF AIRCRAFT, PERFORMANCE(ENGINEERING)), HOVERING, PITCH(MOTION), STABILITY, ROLL, AERODYNAMIC CHARACTERISTICS, MATHEMATICAL ANALYSIS

Subject Categories : V/STOL

Distribution Statement : APPROVED FOR PUBLIC RELEASE