trim tab

trim tab

noun Aeronautics.
an independently controlled tab set in the trailing edge of a control surface, as an elevator, aileron, or rudder, to hold it in a position suitable for stabilizing the aircraft in a flight attitude.
Also, trimming tab.
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Trim tab is always a great word to know.
So is bulk modulus. Does it mean:
maximum deviation of an alternating current from its average value
coefficient of substance's elasticity expressing ratio between pressure and fractional change
Collins
World English Dictionary
trim tab
 
n
a small control surface attached to the trailing edge of a main control surface to enable the pilot to trim an aircraft

Collins English Dictionary - Complete & Unabridged 10th Edition
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