Accession Number : ADP005036

Title :   Effects of Aerodynamic Lags on Aircraft Responses,

Corporate Author : TECHNISCHE HOGESCHOOL DELFT (NETHERLANDS) DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Vaart,J. C. van der

Report Date : NOV 1985

Pagination or Media Count : 11

Abstract : Results of a theoretical study on the effects of unsteady aerodynamics on symmetric aircraft responses due to elevator and vertical turbulence inputs, are presented. Several linear models were developed to describe unsteady lift and downwash and delays due to horizontal tail length. Results for three example aircraft types show that calculated normal acceleration levels due to turbulence are very 'little affected by including unsteady wing lift and downwash. However, there appears to be a noticable influence on plunging acceleration and pitch rate response to elevator or vertical turbulence inputs.

Descriptors :   *AERODYNAMIC CONTROL SURFACES, TURBULENCE, VERTICAL ORIENTATION, DYNAMIC RESPONSE, DELAY, ELEVATORS, TAILS(AIRCRAFT), LIFT, DOWNWASH, ACCELERATION, PITCH(MOTION), NETHERLANDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE