2000 | OriginalPaper | Chapter
The Linear Theory of a Lifting System Moving Close to the Ground
Author : Professor Kirill V. Rozhdestvensky
Published in: Aerodynamics of a Lifting System in Extreme Ground Effect
Publisher: Springer Berlin Heidelberg
Included in: Professional Book Archive
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To reduce a nonlinear formulation to the linear theory, one has to assume that the deflections of the surfaces of the wing, its vortex wake, and the ground, respectively, from horizontal planes y = h1 and y = 0 are small compared to the ground clearance h, i.e., 3.1$$\begin{array}{*{20}{c}} {\left| {{y_{u,l,w}} - h} \right| \ll h,}&{\left| {{y_g}} \right|} \end{array} \ll h.$$