Chapter 6: stability and control

phugoid longitudinal mode and the angle of attack oscillation is called the short period

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phugoid longitudinal mode and the angle of attack oscillation is called the short period mode. These oscillations are a consequence of the aircraft’s positive static stability. Mean Aerodynamic Chord For untapered wings, the wing chord length is used as the reference chord length, , in the expression for moment coefficient. For tapered wings, a simple average chord length is sometimes used. The most commonly used value for is known as the mean aerodynamic chord (M.A.C.) The M.A.C. is a weighted average chord defined by the expression: (6.11) For untapered wings, M.A.C. = c. For linearly tapered wings, (6.11) simplifies to: (6.12) Directory: ~jps7 -> Aircraft%20Design%20Resources Aircraft%20Design%20Resources -> Systems in Transportation: The case of the Airline Industry Download 2.68 Mb. Share with your friends: