Airplane takeoff trims utilizing both stabilizers and elevators
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United States of America Patent
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Oct 27, 2020
Grant Date -
Mar 21, 2019
app pub date -
Sep 18, 2017
filing date -
Sep 18, 2017
priority date (Note) -
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Abstract
Provided are airplane trim systems and methods of controlling such systems. These systems utilize smaller portions of the stabilizer total travel range for takeoff trims, in comparison to other trim systems. A trim system described includes stabilizer and elevator, and these components are used together to achieved a takeoff total tail pitching moment. The elevator or, at least a portion of the elevator operating range, is available for flight control. As such, takeoff trim settings include stabilizer and elevator orientation settings. Addition of the elevator to control the takeoff tail pitching moment allows reducing the stabilizer total travel. The elevator orientation can be changed much faster than that of the stabilizer providing pilot more control.
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