Venturi tube. A specially shaped tube attached to the outside of an aircraft to produce suction to allow proper operation of gyro instruments.
VENTURI TUBE - A small, hourglass-shaped metal tube, usually set laterally on a fuselage in the slipstream to create suction for gyroscopic panel instruments. Now outdated by more sophisticated means.
Venturi Tube: A tube made with a gradually reduced cross-section about its centre which speeds up fluid flow through the tube at that point and so produces suction.
A practical application of Bernoulli's Principle is the venturi tube. The venturi tube has an air inlet that narrows to a throat (constricted point) and an outlet section that increases in diameter toward the rear.
A practical application of Bernoulli's Theorem is the Venturi Tube. A Venturi tube consists of a tube which narrows to a throat (reduced diameter). The airflow at the throat is increased while the pressure is decreased.
 See also: Velocity, Cross, Plane, Direct, Vertical axis
  
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