Accession Number : ADP005030

Title :   Dynamic Nonlinear Airloads: Representation and Measurement,

Corporate Author : NATIONAL AERONAUTICAL ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Hanff,E. S.

Report Date : NOV 1985

Pagination or Media Count : 14

Abstract : This paper proposes a new representation of aerodynamic reactions in terms of the motion variables, which does not rely on assumptions of linearity. This representation is therefore indicated for extreme flight conditions where a locally linearized model is usually of questionable value. The significance within the present context of stability derivatives is discussed with the intention of pointing out their range of applicability. A wind-tunnel technique, capable of efficiently obtaining the bulk of the data required for the effective use of the above representation, is briefly described.

Descriptors :   *AERODYNAMIC LOADING, DYNAMIC RESPONSE, RANGE(EXTREMES), NONLINEAR ANALYSIS, DYNAMIC LOADS, ROLL, OSCILLATION, WIND TUNNEL TESTS, ANGLE OF ATTACK, HIGH ANGLES, CANADA

Distribution Statement : APPROVED FOR PUBLIC RELEASE