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The rudder may also be called upon to counter-act the adverse yaw produced by the roll-control surfaces. If rudder is continuously applied in level flight the aircraft will yaw initially in the direction of the applied rudder – the primary effect of rudder. After a few seconds the aircraft will tend to bank in the direction of yaw.
The flight deck control has three positions: off, automatic ("armed"), and manual (rarely used). On landing approach "automatic" is selected and, on touchdown, a sensor called a weight-on-wheels switch signals the lift dumpers to be raised. The flight control spoilers are also raised as additional lift dumpers.
Collection of control yokes at Boeing Future of Flight Museum: 747, 707, B-29, Trimotor.The former two yokes are W-shaped, while the latter two are circular. The cockpit of Concorde, which has an M-shaped yoke mounted on a control column The cockpit of an Embraer ERJ with an M-shaped yoke "W"/"U" style yoke in a Cessna 152 light aircraft, mounted on a horizontal tube protruding from the ...
Diagram of a falling leaf maneuver. A falling leaf (also called a rudder stall or oscillation stall) is a maneuver in which an aircraft performs a wings-level stall (the airplane stops flying and starts falling) which begins to induce a spin.
Rolling slowly left will require moving the rudder slowly to the right, then back to center as the wings become level in inverted flight (where of course some elevator is needed), and then to the left as the roll continues and puts the right wing down, and finally back to center and the aircraft returns to straight and level flight.
Adverse yaw is a secondary effect of the inclination of the lift vectors on the wing due to its rolling velocity and of the application of the ailerons. [2]: 327 Some pilot training manuals focus mainly on the additional drag caused by the downward-deflected aileron [3] [4] and make only brief [5] or indirect [6] mentions of roll effects.
Essential flight control surfaces are attached here to control the direction of the departing air flow, and exert a controlling force on the aircraft. [2] Such control surfaces include ailerons on the wings for roll control, elevators on the tailplane controlling pitch , and the rudder on the fin controlling yaw .
Typical trim tabs on aileron, rudder and elevator. Trim tabs are small surfaces connected to the trailing edge of a larger control surface on a boat or aircraft, used to control the trim of the controls, i.e. to counteract hydro- or aerodynamic forces and stabilise the boat or aircraft in a particular desired attitude without the need for the operator to constantly apply a control force.