control reversal


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control reversal

i. The situation in which the effect of control deflections is opposite what is desired or normal. It may be caused by a mechanical malfunction or aeroelastic distortion of the airframe—more often the latter. The most common phenomenon is aileron reversal. See aileron reversal.
ii. Aileron reversal also occurs in some aircraft at very low speeds. The descending aileron increases the angle of attack of that portion of the wing, causing stall of the wing that should be moving upward, causing it to drop.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
(a) It must be shown by the methods of paragraph (b) and either paragraph (c) or (d) of this section, that the airplane is free from flutter, control reversal, and divergence for any condition of operation within the limit V-n envelope and at all speeds up to the speed specified for the selected method.
(b) Flight flutter tests must be made to show that the airplane is free from flutter, control reversal and divergence and to show that--
(c) Any rational analysis used to predict freedom from flutter, control reversal and divergence must cover all speeds up to 1.2 [V.sub.D].
After completing Phase 1, they were transferred to either a whole reversal in which bot h tasks were reversed, or a partial reversal in which only one of the two tasks was reversed but the other was not reversed, or a control reversal in which only one of two tasks was reversed but the other was replaced for a new discrimination task.
Group Control was run under the control reversal condition in which only one of the two tasks (vertical-horizontal stripes task) was rev ersed and a new discrimination task (triangle-circle task) was added instead of the other (white-black task).
After completing Phase 1 training, they transferred to either a whole reversal or a partial reversal or a control reversal. The expectation according to Nakagawa's view (1978, 1986, 1992, 1998, 1999a, 1999b, 1999c, 1999d) is that animals of the partial reversal condition master reversal faster than animals of the control reversal condition, which in turn master reversal faster than animals of the whole reversal condition.
Group Control was run under a control reversal condition in which only one of the two tasks was reversed and a new discrimination task (i.e., triangle-circle task) was given instead of the other (i.e., white-black task).
Acquisition of Phase 1 training by a whole reversal group was compared with acquisition of the corresponding in both a partial reversal group and a control reversal group.