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DESIGN OF A LIGHT AIRPLANE STABILITY AUGMENTATION SAFETY SYSTEM.
TACTAIR FLUID CONTROLS CORP BRIDGEPORT CONN
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The objective of the project is to design and build a light airplane stability augmentation safety system SAS to fulfill two requirements 1 If manually selected by the pilot, SAS will have cruise-relief usefulness in preventing upsets due to pilot inattention or disorientation and 2 if not manually selected, SAS will warn the pilot that he is approaching hazardous flight regimes and will automatically return the airplane to normal flight speeds and attitudes. A flight test program was conducted on a light single-engine low-wing airplane with recording instrumentation installed. The control force required to recover the airplane from various combinations of airspeed, rate of descent and bank angle to normal flight was determined. These data are tabulated as well as plotted and analyzed. The flight test data was used to design the stability augmentation safety system for the test airplane. The report presents the design of this system as based upon the use of airspeed and rate of descent sensors to either provide automatic activation of the system or warn the pilot, or both. Author
APPROVED FOR PUBLIC RELEASE