Ch 18 - Control Flashcards

1
Q

Principle of Operation

A

Local camber changing devices

Usually located on extremities

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2
Q

Aileron

A

Rate control - bigger movement of controls = faster rot

Does not change direction

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3
Q

Rudder

A

Displacement control - displaces aircraft from original flight path

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4
Q

Elevator

A

Displacement control - changes direction of aircraft

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5
Q

Hinge Moments

A

The more aerodynamic force generated from surface = the more you feel it in the controls

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6
Q

Aerodynamic Balance: The Inset Hinge

A

The hinge is inset up to 25% along the control surface so the force required to move it decreases

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7
Q

Aerodynamic Balance: Horn Balance

A

A section on the surface forward of the hinge line

Air gets caught under the front bit assisting in deflecting the surface

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8
Q

Aerodynamic Balance: The Internal Balance

A

A small diaphragm between the surface and main surface which is surrounded by q + p

Aileron still wants to get back to original position

Flexible diaphragm (rubber) resists motion basically

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9
Q

Aerodynamic Balance: Balance Tab

A

Makes controls lighter

Deflects in opposite direction to the surface (which balances it out)

These are inefficient (drag) and you lose a bit of control effectiveness

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10
Q

Aerodynamic Balance: The Anti Balance Tab

A

Makes controls heavier

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11
Q

Aerodynamic Balance: The Servo-Tab

A

Makes the controls much lighter

Moves the tab first and then the controls

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12
Q

Aerodynamic Balance: Spring Tab

A

Acts like a servo - tab at high speed (both move, tab first)

Acts like a balance tab at slow speed

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