elastic axis
elastic axis
[i′las·tik ′ak·səs] (mechanics)
The lengthwise line of a beam along which transverse loads must be applied in order to produce bending only, with no torsion of the beam at any section.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
elastic axis


If an up-gust strikes the wing an increase on angle of attack results. Increased lift acts through the aerodynamic center. The wing twists nose upward about its elastic axis located some distance behind the aerodynamic center. This increases the angle of attack and lift even more and the self-perpetuation continues.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved