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Simulation evaluation of transition and hover flying qualities of a mixed-flow, remote-lift STOVL aircraftUsing a generalized simulation model developed for piloted evaluations of STOVL aircraft, an initial fixed-base simulation of a mixed-flow, remote-lift configuration has been completed. Objectives were to evaluate the integration of the aircraft's flight and propulsion controls to achieve good flying qualities throughout the low-speed flight envelope; to determine control power used during transition, hover, and vertical landing; and to evaluate the transition flight envelope considering the influence of thrust deflection of the remote-lift component. Pilots' evaluations indicated that Level 1 flying qualities could be achieved for deceleration to hover in instrument conditions, for airfield landings, and for recovery to a small ship when attitude and velocity stabilization and command augmentation control modes were provided. Level 2 flying qualities were obtained for these same tasks when only the attitude command mode was used, leaving the pilot to perform the task of thrust management required to control the flight-path and speed in transition and the horizontal and vertical translational velocities in hover. Thrust margins were defined for vertical landing as a function of ground effect and hot-gas ingestion.
Document ID
19900058409
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Franklin, James A.
(NASA Ames Research Center Moffett Field, CA, United States)
Stortz, Michael W.
(NASA Ames Research Center Moffett Field, CA, United States)
Engelland, Shawn A.
(NASA Ames Research Center Moffett Field, CA, United States)
Hardy, Gordon H.
(NASA Ames Research Center Moffett Field, CA, United States)
Martin, James L.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
September 1, 1989
Subject Category
Aircraft Stability And Control
Report/Patent Number
SAE PAPER 892284
Accession Number
90A45464
Distribution Limits
Public
Copyright
Other

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