Open Access
Effect of wing aspect ratio and flap span on aerodynamic characteristics of an externally blown jet-flap STOL model
TLDR
In this article, the effects of flap span and wing aspect ratio on the static longitudinal aerodynamic characteristics and chordwise and spanwise pressure distributions on the wing and trailing-edge flap of a straight-wing STOL model having an externally blown jet flap without vertical and horizontal tail surfaces were investigated.Abstract:
An investigation has been conducted to determine the effects of flap span and wing aspect ratio on the static longitudinal aerodynamic characteristics and chordwise and spanwise pressure distributions on the wing and trailing-edge flap of a straight-wing STOL model having an externally blown jet flap without vertical and horizontal tail surfaces. The force tests were made over an angle-of-attack range for several thrust coefficients and two flap deflections. The pressure data are presented as tabulated and plotted chordwise pressure-distribution coefficients for angles of attack of 1 and 16. Pressure-distribution measurements were made at several spanwise stations.read more
Citations
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Wind tunnel investigation of aerodynamic loads on a large-scale externally blown flap model and comparison with theory
B. Perry,G. C. Greene +1 more
TL;DR: A wind-tunnel investigation of a large-scale externally blown flap model is presented in this paper, where the model was equipped with four turbofan engines, a triple-slotted flap system, and a T-tail.
Pressure distribution of a twin-engine upper-surface blown jet-flap model
C. C. Smith,L. C. White +1 more
TL;DR: In this paper, an investigation was made to determine the chordwise and spanwise pressure distributions of a small-scale upper-surface blown jet-augmented flap STOL model.
Longitudinal aerodynamic characteristics of an externally blown flap powered lift model with several propulsive system simulators
TL;DR: In this article, an investigation of a four-engine externally blown flap (EBF) powered-lift transport was conducted in the Langley V/STOL tunnel to determine the effect of different engine configurations on the longitudinal aerodynamic characteristics.
Journal ArticleDOI
Propulsion Characteristics Affecting the Aerodynamic Performance of an Externally Blown Flap Transport Model
TL;DR: In this paper, the effect of different wake characteristics on the performance of two separate externally blown flap transport configurations was investigated using two wind-tunnel investigations at Langley Research Center.
References
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Theoretical symmetric span loading due to flap deflection for wings of arbitrary plan form at subsonic speeds
TL;DR: In this paper, a simplified lifting surface theory is applied to the problem of evaluating span loading due to flap deflection for arbitrary wing plan forms, and the effects of compressibility and spanwise variation of section lift-curve slope are taken into account by the procedure.
Effect of engine position and high-lift devices on aerodynamic characteristics of an external-flow jet-flap STOL model
TL;DR: In this article, the effect of engine position and high lift devices on aerodynamic characteristics of external flow, jet flap STOL model was investigated and graphs were generated to show the relationship between engine position, high lift and external flow.