Fin
In aerospace engineering, a fin is a surface that is typically attached to the tail of an aircraft or rocket and is used to provide stability and control during flight. Fins can be either fixed or movable, and they work by creating aerodynamic forces that help to keep the vehicle on course and prevent it from rolling or yawing. Fixed fins are typically used for smaller vehicles or those that do not require a high degree of maneuverability, while movable fins are used for larger vehicles or those that need to be able to make rapid changes in direction. Fins can also be used to control the vehicle's speed and altitude, by adjusting the angle of attack or by creating drag. In addition to their practical applications, fins can also be used for aesthetic purposes, to give a vehicle a sleek and streamlined appearance.
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