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Airplane Decalage

Aeronautical Terms Defined
(content generated by ChatGPT)

Decalage is a term used in aircraft design to describe the difference in incidence angle between the wing and the horizontal stabilizer. The incidence angle of the wing is the angle between the chord line of the wing and the longitudinal axis of the aircraft, while the incidence angle of the horizontal stabilizer is the angle between the chord line of the stabilizer and the longitudinal axis of the aircraft.

The decalage angle is important because it affects the stability and control of the aircraft. A positive decalage angle, where the wing has a higher incidence angle than the horizontal stabilizer, will create a positive pitching moment and increase the lift generated by the wing. A negative decalage angle, where the wing has a lower incidence angle than the horizontal stabilizer, will create a negative pitching moment and decrease the lift generated by the wing.

In aircraft design, the decalage angle must be carefully considered to ensure safe and efficient flight. The decalage angle can be adjusted through changes in the angle of attack of the wing or the horizontal stabilizer, or through the use of control surfaces, such as flaps or trim tabs.

A positive decalage angle is often used in aircraft design to enhance the stability of the aircraft, while a negative decalage angle is used to provide more control over the aircraft's pitch. The optimal decalage angle will depend on the desired flight characteristics, the weight of the aircraft, and the airspeed, and must be carefully managed to ensure safe and efficient flight.

 

 

Posted February 4, 2023

About Airplanes & Rockets 

Kirt Blattenberger, Webmaster - Airplanes and RocketsKirt Blattenberger

Carpe Diem! (Seize the Day!)

Even during the busiest times of my life I have endeavored to maintain some form of model building activity. This site has been created to help me chronicle my journey through a lifelong involvement in model aviation, which all began in Mayo, MD ...

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