This paper presents an analysis of current departure resistance and high angle of attack (HAOA) flying quality parameters with respect to applicability and utility in the design and assessment of today's enhanced maneuverability aircraft. Modern fighter/attack aircraft possess extremely nonlinear aerodynamic databases and highly complex flight control systems. In addition, these aircraft require both departure resistance and mission effective HAOA maneuvering capability. The limitations of using traditional departure susceptibility parameters such as C(sub n(beta (sub DYN))) and LCDP to address departure resistance and agility design and analysis issues are analyzed and presented herein. Discussion includes the design philosophy and tradeoffs of improving static versus dynamic departure resistance. In addition, the utility of open or closed-loop departure parameters derived from linear and/or decoupled equations of motion representing highly nonlinear aircraft is addressed. Finally, a general methodology outlining the application and validity of current departure susceptibility parameters to the modern aircraft HAOA flight regime is provided with recommendations.
Application of Current Departure Resistance Criteria to the Post-Stall Manoeuvering Envelope
1994
17 pages
Report
No indication
English
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