aerodynamic damping

aerodynamic damping

aerodynamic dampingclick for a larger image
The damping in roll effect—the difference in angle of attacks of the two wings and consequent lift differential tends to restore the aircraft into wings level altitude.
aerodynamic dampingclick for a larger image
Whenever in-flight maneuvers result in rotation of an aircraft about or near its center of gravity, a restoring moment is created by the changed relative airflow. This restoring moment opposes the control demands, and it arrests maneuvers as and when the control demands cease. The effectiveness of the restoring moment (known as aerodynamic damping) is dependent on the dynamic pressure (i.e., indicated air speed). As altitude increases, true air speed increases for the given equivalent air speed, resulting in decreased aerodynamic forces. Thus, at higher altitudes the pilot must apply greater opposite control movements to arrest rotation.
References in periodicals archive ?
Reduced aerodynamic damping does not necessarily represent a flutter problem, because the inherent damping of sailplane structure was neglected at current stage of investigation and the aerodynamic models used in analyses were not validated.
Reduction of aerodynamic damping of the fuselage was observed in V-g diagrams in the speed range of 100-150 km/h when the rudder is free (pilot's feet are off the rudder pedals).
Some of the explanations are rather in-depth--spider webs not throwing insects back off after they hit the web because of hysteresis and aerodynamic damping, for instance.
With the model, we found, unexpectedly, that aerodynamic damping has a tremendous effect on capturing prey On the scale of insects, air resistance plays a large role.
A team of McDonnell Douglas flight test engineers and their design-and-technology counterparts monitored the structural aerodynamic damping (SAD) tests from the Douglas Aircraft Co.
Aerodynamic damping of wind turbines is essential for minimizing vibrations (while turbine operations), which can lead to structural failures.
During the flight, the first C-17 opened its cargo door and ramp in flight for the second time and continued structural aerodynamic damping investigations.
Other flight test milestones accomplished by T-1 to date include structural aerodynamic damping investigations at various altitudes and airspeeds with light, medium and heavy fuel loads; flying qualities evaluations with different flap settings, and airstarts using JP-4 and JP-8 fuel.
The flight today lasted two hours, and included aerodynamic damping investigations and airstarts using JP-4 fuel.
The flight test aircraft is currently undergoing structural aerodynamic damping investigations, and the flight envelope has been expanded to 340 knots airspeed and 35,000 feet altitude.