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A Study of Conventional Airplane Handling Qualities Requirements: Part II. Lateral-Directional Oscillatory Handling Qualities

Report Number: AFFDL TR 65-138 Part 2
Author(s): I. L. Ashkenas
Corporate Author: Systems Technology, Inc.
Laboratory: Air Force Flight Dynamics Laboratory
Date of Publication: 1965-11
Pages: 73
Contract: AF 33(657)-10407
Project: 8219
Task: 821905
AD Number: AD0627989

Abstract:
This report is a codification in two parts of conventional aircraft handling qualities criteria. The results of this effort are to serve as an intermediate design guide in the areas of lateral-directional oscillatory and roll control. The roll handling qualities portion of this report uses as a point of departure the concept that control of bank angle is the primary piloting task in maintaining or changing heading. In the lateral oscillatory portion of this effort, in defining requirements for satisfactory Dutch roll characteristics, a fundamental consideration is the fact that the motions characterizing this mode are ordinarily not the pilot's chief objective. That is, he is not deliberately inducing Dutch roll motions in the sense that he induces rolling and longitudinal short-period motions. A worthwhile approach to establishment of Dutch roll damping requirements is to first establish the basic level, and then to study the varied influences of the disturbance parameters. This approach provides the basis for the material contained in this report.

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