fixed tab

fixed tab

fixed tab
A small-hinged surface forming a part of the trailing edge of an airplane's primary control surface but which can be adjusted on the ground only. Normally, fixed tabs are parts of ailerons and rudders only.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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Basic airplanes, like the Cessna 172, have a fixed tab while faster and heavier ones usually have one adjustable from the cockpit.
On your tail: the tail is there to balance forces created by the wing's lift and to minimize yaw. How your tail is designed influences how it works and the airplane's stability
Fixed tabs also are used in other locations on an airframe, notably the ailerons.
Secondary controls

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