relative airflow

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• relative airflow — The air in a region where the pressure, temperature, and relative velocity are unaffected by the passage of aircraft through it. Also known as free stream flow …   Aviation dictionary

• airflow — A flow or stream of air. An airflow may take place in a wind tunnel, in the induction system of an engine, etc. It is relative airflow that goes past the wing or other parts of a moving craft. The rate of airflow is measured by mass or volume per …   Aviation dictionary

• relative wind — i. The velocity and direction of the wind with reference to the body over which it is flowing. Also the relative airflow against an airfoil. In aircraft, it is normally the same as the TAS (true air speed) but seldom aligned with the longitudinal …   Aviation dictionary

• Relative wind — in aeronautics= In aeronautics, the relative wind is the direction of airflow over the airfoil, i.e. in vector terms it is the vector sum of the ambient air past the aircraft: Most usefully, it is the direction of the air over the aircraft s… …   Wikipedia

• relative wind — noun : the motion of the air relative to a body in it usually determined so as to exclude disturbance at the surfaces of the body * * * /wind/ the velocity or direction of airflow with respect to the body it surrounds, esp. an airfoil. [1915 20] …   Useful english dictionary

• airflow — noun Date: circa 1911 a flow of air; especially the motion of air (as around parts of an airplane in flight) relative to the surface of a body immersed in it …   New Collegiate Dictionary

• relative wind — /wind/ the velocity or direction of airflow with respect to the body it surrounds, esp. an airfoil. [1915 20] * * * …   Universalium

• Dissymmetry of lift — in rotorcraft aerodynamics refers to an uneven amount of lift on opposite sides of the rotor disc. It is a phenomenon that affects single rotor helicopters in lateral flight, whether the direction of flight be forwards, sideways or in reverse.… …   Wikipedia

• Slip (aerodynamic) — A slip is an aerodynamic state where an aircraft is moving sideways as well as forward relative to the oncoming airflow. In other words, for a conventional aircraft, the nose will not be pointing directly into the relative wind . Flying in a slip …   Wikipedia

• Ground effect in aircraft — Aircraft may be affected by a number of ground effects, aerodynamic effects due to a flying body s proximity to the ground.One of the most important of these effects is the Wing In Ground effect, which refers to the reduction in drag experienced… …   Wikipedia

• Darrieus wind turbine — Fig. 1: A Darrieus wind turbine once used to generate electricity on the Magdalen Islands The Darrieus wind turbine is a type of vertical axis wind turbine (VAWT) used to generate electricity from the energy carried in the wind. The turbine… …   Wikipedia