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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
Ch07-H6927.tex 20/6/2007 16: 34 Page 195
Lateral–Directional Dynamics 195
is very slow in the context of normal piloted manoeuvring activity. The classical
requirement for spiral mode stability given by the inequality condition of equation
(7.36) is satisfied since
0.00149 > 0.0011
Notice how close the values of the two numbers are, suggesting the mode to be close
to neutrally stable in the time scale of normal transient response. This observation is
quite typical of a conventional aeroplane like the DC-8.
Approximate values for the dutch roll mode damping ratio and undamped natural
frequency are obtained by substituting the relevant values for the concise ...
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Publisher Resources

ISBN: 9780750669276