Author: Edwin E. DavenportPublisher:
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. DavenportPublisher:
ISBN:
Category : Ducted fans
Languages : en
Pages : 64
Book Description
Aerodynamic Characteristics of Four-duct Tandem VTOL-aircraft Configurations
Author: William A. NewsomPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 160
Book Description
NASA Technical Note
Author: An Analytical Study of V/STOL Handling Qualities in Hover and Transition
Author: R. L. StaplefordPublisher:
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: V/STOL Concepts in the United States: Past, Present, and Future
Author: Index Aeronauticus
Author: VTOL/STOL Aircraft
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and DevelopmentPublisher:
ISBN:
Category : Short take-off and landing aircraft
Languages : en
Pages : 344
Book Description
NASA Scientific and Technical Reports
Author: United States. National Aeronautics and Space Administration Scientific and Technical Information DivisionPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1152
Book Description
Author: