Author: Edwin E. Davenport
Publisher:
ISBN:
Category : Ducted fans
Languages : en
Pages : 64
Book Description
Transition Characteristics of a VTOL Aircraft Powered by Four Ducted Tandem Propellers
Author: Edwin E. Davenport
Publisher:
ISBN:
Category : Ducted fans
Languages : en
Pages : 64
Book Description
Publisher:
ISBN:
Category : Ducted fans
Languages : en
Pages : 64
Book Description
Aerodynamic Characteristics of Four-duct Tandem VTOL-aircraft Configurations
Author: William A. Newsom
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 160
Book Description
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 160
Book Description
NASA Technical Note
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 480
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 480
Book Description
An Analytical Study of V/STOL Handling Qualities in Hover and Transition
Author: R. L. Stapleford
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 174
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.
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 174
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.
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 856
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 856
Book Description
The Development of a Simplified Analytical Approach for Evaluation of the Dynamic Stability Characteristics of a Ducted-propeller VTOL Aircraft in Transition
Author: Douglas H. Halley
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
V/STOL Concepts in the United States: Past, Present, and Future
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description
Index Aeronauticus
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 976
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 976
Book Description
VTOL/STOL Aircraft
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
Book Description
Publisher:
ISBN:
Category : Short take-off and landing aircraft
Languages : en
Pages : 344
Book Description
NASA SP.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1156
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1156
Book Description