Airframe Assembly And Rigging

Front 1

Why is it especially important that the leading edge of a wing and the upper surface of the forward half of the wing be kept free of dents, and any dirt or contamination?

Back 1

Because this would impact the air flowing over this portion of the wing which must be smooth to produce the maximum amount of lift.

Front 2

What is meant by the angle of attack of an airplane wing?

Back 2

It is the accute angle between the wing chord line and the relative wind or airstream.

Front 3

What is meant by the angle of incidence of an airplane wing?

Back 3

It is the accute angle between the wing chord line and the longitudinal axis of the aircraft

Front 4

What are the four basic forces that act on an aircraft in flight?

Back 4

Lift vs gravity, and thrust vs drag

Front 5

What is meant by parasitic drag on an airplane?

Back 5

The friction of the air flowing over the aircraft surfaces.

Front 6

What causes parasitic drag on airplanes?

Back 6

The friction generated as the air flows over the aircraft surfaces in flight.

Front 7

Name the three axes of an airplane and the control that rotates the airplane about each of its three axes?

Back 7

Ailerons control roll or forward or backward movement about the longitudinal axis. The ailerons are attached to the outboard trailing edge of each wing and move in the opposite direction from each other.

Elevator is a control surface which typically controls up or down movements as the pilot moves the control column (or stick) backward or foreward. Its the primary means of controlling Pitch—the rotation of an airplane about its lateral or horizontal axis.

Rudder is a control surface which is typically controlled by pedals rather than at the stick. It is the primary means of controlling yaw—the rotation of an airplane about its vertical axis left or right movement.

Front 8

Does the lift that is produced by the horizontal tail surfaces of an airplane act upward or downward in normal flight?

Back 8

Downward

Front 9

What is the function of a lateral dihedral in the wings of an airplane?

Back 9

It gives the aircraft longitudinal or roll stability.

Front 10

What is the purpose of a stall strip on an airplane wing?

Back 10

They cause the roots of the wing to stall early at a higher angle of attack before the trailing edge ahead of the ailerons

Front 11

What is the function of a servo tab on an aircraft control surface?

Back 11

It produces aerodynamic forces on a control surface where it's installed and aids the pilot in moving the control surface, such as an elevator servo tab will allow the pilot increase the control feel, and helps prevent over-controlling the aircraft's pitch

Front 12

Why do most high performance aircraft use slotted flaps?

Back 12

Because they can be deflected to a greater angle than any other type of flaps, and allows air to flow through from the bottom thereby increasing the airflow over the surface before it breaks away.

Front 13

What is the purpose of a movable slat in the leading edge of some airplane wings?

Back 13

It helps to delay the stall by creating additional lift once deployed as the aircraft wing approaches a higher angle of attack at lower speeds of takeoff and landing.

Front 14

What causes dissymmetry of lift produced by the rotor of a helicopter?

Back 14

The difference between the forward traveling rotor blade and the rearward traveling rotor blade on the helicopter as it moves forward.

Front 15

Why do single-rotor helicopters use an auxiliary rotor and their tail?

Back 15

To counteract the torque produced by the main rotor.

Front 16

Why is it important that the leading edge of a Supersonic airplane wing be kept free from dents and damage?

Back 16

Because any dents or damage on the leading edge will form a normal shockwave that slows the air immediately behind it to subsonic velocity.

Front 17

What is the purpose of a vortex generators on the wing of a high-speed airplane?

Back 17

It pulls down the high-energy air to the surface of the wing and prevents the shock induced separation from occurring.

Front 18

Why is it important that the blades of a helicopter rotor system be in track?

Back 18

This could lead to vertical vibration if out of track

Front 19

Why is it important that any repairs to the control surfaces of an airplane not change the original condition of balance about the hinge line?

Back 19

It could cause the control surface to flutter under certain flight conditions.

Front 20

In what FAA publication could you find the correct control surface movement for a particular airplane?

Back 20

The types certificate data sheet of the airplane.