Transition Characteristics of a VTOL Aircraft Powered by Four Ducted Tandem Propellers PDF Download
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Author: Edwin E. Davenport
Publisher:
ISBN:
Category : Ducted fans
Languages : en
Pages : 64
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Book Description
Author: Edwin E. Davenport
Publisher:
ISBN:
Category : Ducted fans
Languages : en
Pages : 64
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Author: William A. Newsom
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 160
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 480
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Author: R. L. Stapleford
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 174
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Book Description
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:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 856
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Author: Douglas H. Halley
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 976
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Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development
Publisher:
ISBN:
Category : Short take-off and landing aircraft
Languages : en
Pages : 344
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1156
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