rolling axis

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i. The longitudinal axis of an aircraft around which the aircraft rolls and banks. Also called a rolling axis.
ii. The horizontal axis in a system of rectangular coordinates. The line on which distances to the right or the left (east or west) of the reference line are marked, especially on a map, chart, or graph.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
A matrix of points on the wheel surface is obtained by revolving the wheel profile around the wheelset's rolling axis, using the parametric equation for a circle through each point on the wheel profile.