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Author:
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Category :
Languages : en
Pages : 842
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Author:
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ISBN:
Category :
Languages : en
Pages : 842
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Author: Clarence D. Cone (Jr.)
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Category : Airplanes
Languages : en
Pages : 76
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Author: Bernard Spencer
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Category : Aerodynamics
Languages : en
Pages : 54
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An investigation has been conducted at low subsonic speeds to study the effects of canard planform and wing-leading-edge modification on the longitudinal aerodynamic characteristics of a general research canard airplane configuration. The basic wing of the model had a trapezoidal planform, an aspect ratio of 3.0, a taper ratio of 0.143, and an unswept 80-percent-chord line. Modifications to the wing included addition of full-span and partial-span leading-edge chord-extensions. Two canard planforms were employed in the study one was a 60° sweptback delta planform and the other was a trapezoidal planform similar to that of the basic wing. Modifications to these canards included addition of a full-span leading-edge chord-extension to the trapezoidal planform and a fence to the delta planform. For the basic-wing-trapezoidal-canard configuration, rather abrupt increases in stability occurred at about 12° angle of attack. A slight pitch-up tendency occurred for the delta-canard configuration at approximately 8° angle of attack. A comparison of the longitudinal control effectiveness for the basic-wing-trapezoidal-canard combination and for the basic-wing-delta-canard combination indicates higher values of control effectiveness at low angles of attack for the trapezoidal canard. The control effectiveness for the delta-canard configuration, however, is seen to hold up for higher canard deflections and to higher angles of attack. Use of a full-span chord-extension deflected approximately 30° on the trapezoidal canard greatly improved the control characteristics of this configuration and enabled a sizeable increase in trim lift to be realized.
Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 448
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 284
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1160
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Author: United States. Department of Commerce. Office of Technical Services
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Category : Government publications
Languages : en
Pages : 836
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Author: United States. National Aeronautics and Space Administration
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Category :
Languages : en
Pages :
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 818
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Author: United States. Superintendent of Documents
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ISBN:
Category : Government publications
Languages : en
Pages : 1304
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