control surface

control surface

noun

A movable airfoil, especially a rudder, aileron, or elevator, used to control or guide an aircraft, guided missile, or rocket.

THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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"control surface." YourDictionary, n.d. Web. 31 January 2019. <https://www.yourdictionary.com/control-surface>.

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control surface. (n.d.). Retrieved January 31st, 2019, from https://www.yourdictionary.com/control-surface

Noun

(plural control surfaces)

(aeronautics) A moveable surface attached to a machine such as an aircraft or submarine that can be used to control the machine's motion in roll, pitch or yaw.
Before flight its is vital to ensure all control surfaces are clear of obstruction and can move smoothly and freely.

English Wiktionary. Available under CC-BY-SA license.