This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Simulation Evaluation of Transition and Hover Flying Qualities of a Mixed-Flow, Remote-Lift STOVL Aircraft
Annotation ability available
Sector:
Language:
English
Abstract
Using a generalized simulation model developed for piloted evaluations of short take-off/vertical landing aircraft, an initial fixed-base simulation of a mixed-flow, remote-lift configuration has been completed. Objectives of the simulation 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. Finally, the results provide a general view of the acceptable transition corridor, expressed in terms of minimum level flight acceleration, including the effects of thrust-vectoring efficiency and excess thrust.
Authors
- James A. Franklin - NASA Ames Research Center Moffett Field, CA
- Michael W. Stortz - NASA Ames Research Center Moffett Field, CA
- Shawn A. Engelland - NASA Ames Research Center Moffett Field, CA
- Gordon H. Hardy - NASA Ames Research Center Moffett Field, CA
- James L. Martin - NASA Ames Research Center Moffett Field, CA
- Ronald M. Gerdes - NASA Ames Research Center Moffett Field, CA
Topic
Citation
Franklin, J., Stortz, M., Engelland, S., Hardy, G. et al., "Simulation Evaluation of Transition and Hover Flying Qualities of a Mixed-Flow, Remote-Lift STOVL Aircraft," SAE Technical Paper 892284, 1989, https://doi.org/10.4271/892284.Also In
References
- Levine J. Inglis M. “US/UK Advanced Short Takeoff and Vertical Landing Program,” AIAA Paper 89-2039 1989
- Franklin J. A. Stortz M. W. Gcrdcs R. M. Hardy G. H. Martin J. L. Engelland S. A. “Simulation Evaluation of Transition and Hover Flying Qualities of the E-7A STOVL Aircraft,” NASA TM-101015 1988
- Foster J. D. Moralez E. III Franklin J. A. Schroeder J. A. “Integrated Control and Display Research for Transition and Vertical Flight on the NASA V/STOL Research Aircraft (VSRA),” NASA TM-100029 1987
- Merrick V. K. “Study of the Application of an Implicit Model-Following Flight Controller to Lift-Fan VTOL Aircraft,” NASA TP-1040 1977
- Moralez E. Merrick V. K. Schroeder J. A. “Simulation Evaluation of the Advanced Control Concept for the NASA V/STOL Research Aircraft (VSRA),” AIAA Journal of Guidance, Control and Dynamics 12 4 May-June 1989
- Franklin J. A. Hynes C. S. Hardy G. H. Martin J. L. Innis R.C. “Flight Evaluation of Augmented Controls for Approach and Landing of Powered-Lift Aircraft,” AIAA Journal of Guidance, Control, and Dynamics 9 5 Sept.-Oct. 1986
- Hynes C. S. Franklin J. A. Hardy G. H. Martin J. L. Innis R. C. “Flight Evaluation of Pursuit Displays for Precision Approach of Powered-Lift Aircraft,” AIAA Journal of Guidance, Control, and Dynamics 12 4 July-Aug. 1989
- Fortcnbaugh R. L. “Mathematical Models for the Aircraft Operational Environment of DD-963 Class Ships,” Vought Corp. Report 2-55800/8R-3500 Sept. 1978
- Cooper G. E. Harper R. P. Jr. “The Use of Pilot Rating in the Evaluation of Aircraft Handling Qualities,” NASA TN D-5153 1969
- Chalk C. R. Key D.L. KroII J. Jr. Wasser-man R. Radford R. C. “Background Information and User Guide for MIL-F-83300, Military Specification, Flying Qualities for Piloted V/STOL Aircraft,” AFFDL-TR-70-88 Nov. 1971
- Merrick V. K. Gerdes R. M. “VTOL Controls for Shipboard Operation,” SAE Paper 831428 1983