Influence of Pitching Moment Characteristics on Departure and Uncoordinated Roll Reversal Boundaries for Fighter Configurations.
Abstract
A study is reported which generated design charts and developed associated boundaries for identifying departure and uncoordinated roll-reversal flight characteristics as a function of aerodynamic rolling and yawing moment coefficients typical of fighter airplanes for various pitching moment characteristics. This information should be valuable for specification, design and evaluation purposes. The investigation utilized a large angle, six-degree-of-freedom digital computer program to simulate the motions of a fighter performing a severe air combat maneuver. The results showed that the developed uncoordinated roll reversal boundaries may be applied to any fighter configuration and that the developed departure boundaries are applicable to fighter configurations exhibiting static pitch stability. Unaugmented airframes having pitch instability impose more stringent requirements on the rolling and yawing moment coefficients to avoid departure susceptibility. A simple angle-of-attack feedback augmentation system can markedly improve the departure resistance of both stable and unstable airframes given sufficient control authority. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1980
- Accession Number
- ADA082335
Entities
People
- Billy Barnhart
- William Bihrle Jr.