A new concept for three-dimensional aerodynamic attitude flight envelope

Ayman M. Abdallah*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations


In this paper, a new three-dimensional (3D) flight envelope is developed, showing the complete operational range of an aircraft. This 3D envelope is defined by an angle of attack vs. sideslip angle vs. altitude bounded surface. Any x-y planar section describes the trimability extent of the aircraft and the third dimension indicates the aircraft altitude. The trimability extent is the combination of the most extreme orientations or attitudes that an aircraft can adopt while maintaining trimmed rectilinear flight. Since this envelope considers all possible orientations an aircraft can adopt, it is much more descriptive and informative than the more commonly used speed-altitude flight envelope, which only shows operational limits for a symmetric (and ideal) level flight condition. This new envelope can be used for design limits investigation, dynamic characteristics analysis, control system synthesis, or performance comparison. Moreover, this envelope provides a more enhanced insight into trimability-controllability and ceiling limitations within the aircraft design model. The 3D asymmetric aerodynamic attitude flight envelope was developed for a six degree-of-freedom nonlinear simulation model of a high-performance fighter aircraft. The results and remarks are accordingly presented.

Original languageEnglish
Title of host publication2018 Atmospheric Flight Mechanics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105579
StatePublished - 2018

Publication series

Name2018 Atmospheric Flight Mechanics Conference

Bibliographical note

Publisher Copyright:
© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

ASJC Scopus subject areas

  • Mechanical Engineering
  • Aerospace Engineering


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