aerodynamic instability
aerodynamic instability
[‚e·ro·dī′nam·ik ‚in·stə′bil·əd·ē] (aerospace engineering)
An unstable state caused by oscillations of a structure that are generated by spontaneous and more or less periodic fluctuations in the flow, particularly in the wake of the structure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.