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Aerodynamic characteristics in ground proximity (1976)

Hassell, J. L., Jr. ; Thomas, J. L. ; Nguyen, L. T.

In: CASI

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Publication Date: 2016-06-07

Description: Results from recent investigations in the Langley V/STOL tunnel of an externally blown flap and an upper surface blown flap configuration in ground proximity are presented. Comparisons of longitudinal aerodynamic characteristics indicate that in ground proximity, drag is reduced for both configurations, but changes in lift are configuration dependent. Steady state analyses of the landing approach indicate an increase in flight path angle for both configurations in ground proximity because of the drag reduction. Dynamic analyses with a fixed-base simulator indicate that the resultant flight path during landing approach is dependent on the initial flight path angle and the control technique used.

Keywords: AERODYNAMICS

Type: Powered-Lift Aerodyn. and Acoustics; p 145-158

Format: application/pdf

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