An aileron control surface is provided with an inset hinge
To provide an aerodynamic balance So that the leading edge of the up going aileron protrudes into the airflow to prevent adverse yaw
To prevent control flutter.
When an aileron is deflected down its Profile drag increases, induce drag decreases Profile drag increases, induce drag increases Profile drag decreases, induced drag increases.
The aerodynamic restoring force on a control surface Depends only on the air density Is affected only by control angle and independent of speed Increases as speed increases
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A control surface mass balance is a weight Acting forward of the hinge line to prevent control surface flutter Acting on the hinge line allowing easier control movement Acting forward of the hinge line allowing easier control movement.
A frise type aileron is one The upward movement is greater than the downward movement The leading edge protrudes above the wing when the aileron is lowered The leading edge protrudes below the wing when the aileron is lowered.
In a differential aileron system
The leading edge of the up going aileron projects beneath the wing preventing adverse yaw The aileron moves further up than down The aileron moves further down than up.
An aileron control would be aerodynamically balanced by Setting the hinge back into the control surface Attaching a weight to the control surface forward of the hinge Making the up aileron move through a greater angle than the down aileron.
The drag resulting in trimming by a variable incidence tailplane will be Greater than that from an elevator with a trim tab Less than that from an elevator with a trim tab The same a from an elevator with a trim tab
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On an aircraft fitted with spoilers a roll to the right is effected by Extending the left spoiler and keeping the right one retracted Extending both spoilers Extending the right spoiler and keeping the left one retracted.
A horn balance is A rod projecting forward from a control surface with a weight at the end A projection of the outer edge of a control surface forward of the hinge line An extension of the entire leading edge of the control surface forward of the hinge line.
Some aircraft are fitted with fixed trim tabs Theses are set by the manufacturer and must not be altered These may be adjusted only on the ground These may be adjusted in-flight by the pilot.
Downward movement of an elevator trim tab will Overcome a tendency for an aircraft to fly nose heavy Overcome a tendency for an aircraft to fly tail heavy Make the aircraft nose-heavy.
A trim tab will Provide control feel when flying at low speed Assist the pilot in moving the controls near the limit of the range of movement
only Relieve loads on the pilot’s primary control
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The purpose of the spring tab is to Provide feel feedback in a control system Provide a constant spring tension to a trim system
Provide a reduction in the pilot’s effort to move the controls against high air loads
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A balance tab is an auxiliary surface fitted to a main control surface Operated independently by the pilot to remove excessive loads from the controls Operating automatically to provide feel to the controls Operating automatically to assist the pilot in moving the controls
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An aircraft keeps yawing to the left you would trim it by
Moving the adjustable trim tab to the right Adjusting the rudder bar to keep the left rudder pedal forward Moving the fix-trimming tab on the rudder over to the left.
The drag resulting from trimming with a variable incidence tail plane will be
Less than that from an elevator with a trim tab Greater than that from an elevator with a trim tab The same as from an elevator with a trim tab
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Anti-balance tabs Move in the same direction as trim tabs and opposite to the control surface Move in the direction of the control surface, and opposite to the direction of the trim tabs Move in the same direction as the controls and the trim tabs.
On a servo tab operated elevator system, if the pilot control column is pitched forward
The servo tabs will move down The servo tabs will not move until the elevator begins to move The servo tabs will move up.
If the pilot pushes the pitch control forward, the balance tab on the elevator will Remain in the neutral position Move up Move down.
The purpose of a primary stop on an elevator control system is to Restrict the range of the movement of the control column Restrict the range of movement of the elevator Maintain cable tension.
Turnbuckles are fitted in a control cable to
Permit ease of installation of the cable Adjust the range of movement of the control surface Allow cable tension to be adjusted
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In a servo operated aileron control system, turning the cockpit roll control to the right in flight will cause the servo tab on the left aileron To move up and the left aileron to move down To move down and the left aileron to move down To move down and the left aileron to move up
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Incorrect range of movement of a control surface would be caused by
Incorrectly tensioned turnbuckles Incorrect cables fitted Incorrect set stops
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The purpose of a dropped aileron is To compensate for up float in flight To correct for adverse aileron yaw To increase control feel.
The check for safety on a turnbuckle is To check that the inspection hole is blocked by the thread To check that the locking wire is correctly in position To check that the inspection hole is not blocked by the thread.
When the primary stops fitted to a control run have been contacted The secondary stops have been overridden The secondary stops just be in the contact A clearance exists at the secondary stops.
A duplicate inspection of flying control is essential in certain circumstances Only for aircraft with cable operated controls Only for aircraft with servo-assisted flying controls For all aircraft.
A duplicate inspection of the flying control by a pilot or by a flight engineer must cover the checking of several different aspects of the appropriate flying control system. Amongst these are checks to verify The operations of the controls in flight produces the intended effect on the flight path of the aircraft That full movement is in accordance with the figures stated in the Certificate of Airworthiness That full, free and correct movement of control surfaces relative to the movement of their control is obtained
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If a minor adjustment is made to an aircraft while it is away from the maintenance base The pilot may carry out both parts of a duplicate inspection The pilot may carry out the second part of a duplicate inspection The pilot may carry out the first part of a duplicate inspection.
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