A Large-scale Wind-tunnel Investigation of a Wingless Vertical Take-off and Landing Aircraft PDF Download
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Author: David G. Koenig
Publisher:
ISBN:
Category :
Languages : en
Pages : 56
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Author: David G. Koenig
Publisher:
ISBN:
Category :
Languages : en
Pages : 56
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Author: David G. Koenig
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Author: R. L. Stapleford
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Category : Airplanes
Languages : en
Pages : 174
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The hover analysis considers pilot attitude and position control tasks in the presence of horizontal gusts. The effects of each of the stability derivatives on the difficulty of the control tasks and on the closed-loop gust responses are determined. It is clearly shown that the handling qualities studies of control sensitivity and angular damping must consider the influences of M sub u (or L sub v) and should include gust inputs. These conclusions are substantiated by previous variable-stability-helicopter experiments. The effects of vehicle size and geometry are investigated by several approaches. The key result of increasing size is found to be a reduction in M sub u and L sub v which can, in turn, lower the requirements for control power and damping. The handling qualities during transition of two vehicles, a tilt duct and a tilt wing, which were previously tested on a simulator are analyzed. It is shown that both trim control and perturbations about the trim conditions must be considered. In fact, part of the increased difficulty in landing transitions, in comparison with takeoff transitions, is due to more difficult trim control; the much more stringent position control requirements in landing are also a contributing factor.
Author:
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Category :
Languages : en
Pages : 788
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Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division
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ISBN:
Category : Aeronautics
Languages : en
Pages : 262
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 450
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Author:
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ISBN:
Category : Science
Languages : en
Pages : 516
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Author:
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Category : Government publications
Languages : en
Pages : 1160
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Author:
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ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 1196
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Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category :
Languages : en
Pages :
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