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Flight Dynamics Principles, 2nd Edition
book

Flight Dynamics Principles, 2nd Edition

by Michael V. Cook
February 2011
Beginner to intermediate content levelBeginner to intermediate
488 pages
17h 21m
English
Butterworth-Heinemann
Content preview from Flight Dynamics Principles, 2nd Edition
Ch06-H6927.tex 20/6/2007 16: 34 Page 158
158 Flight Dynamics Principles
Again, comparing these approximate values of the phugoid mode characteristics
with the exact values in Example 6.1 indicates good agreement, especially for the
undamped natural frequency. Since the phugoid damping ratio is always small (near to
zero) it is very sensitive to computational rounding errors and to the approximating
assumptions that make a really good approximate match difficult to achieve. The
goodness of the match here is enhanced by the very subsonic flight condition that
correlates well with assumptions made in the derivation of the approximate models.
6.4 FREQUENCY ...
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Publisher Resources

ISBN: 9780750669276