AIRCRAFT STRUCTURAL ASSEMBLY AND RIGGING

Question 1

This refer to the longitudinal (fore and aft) structural members of a semi
monocoque fuselage are called __________.

Answer 1

longerons and stringers.

Question 2

The vertical flight of a helicopter is controlled by _____________.

Answer 2

collective pitch changes.

Question 3

The acute angle formed by the chord line of a wing and the relative
wind is known as the _____________.

Answer 3

angle of attack.

Question 4

A helicopter in forward flight, cruise configuration, changes direction
by______.

Answer 4

tilting the main rotor disk in the desired direction.

Question 5

Main rotor blades that do not cone by the same amount during rotation are said
to be out of ____________.

Answer 5

track.

Question 6

Movement about the longitudinal axis (roll) in a helicopter is effected by
movement of the__________.

Answer 6

cyclic pitch control.

Question 7

Movement about the lateral axis (pitch) in a helicopter is effected by movement
of the _________.

Answer 7

cyclic pitch control.

Question 8

An airplane which has good longitudinal stability should have a minimum
tendency to__________.

Answer 8

pitch.

Question 9

An airplane is controlled directionally about its vertical axis by the…

Answer 9

Rudder.

Question 10

The elevators of a conventional airplane are used to provide rotation about the.

Answer 10

lateral axis.

Question 11

The chord of a wing is measured from________.

Answer 11

leading edge to trailing edge.

Question 12

When the lift of an airfoil increases, the drag will_____.

Answer 12

also increase.

Question 13

What physical factors are involved in the aspect ratio of airplane wings?

Answer 13

Span and chord.

Question 14

Improper rigging of the elevator trim tab system will affect the balance of the
airplane about its____________.

Answer 14

lateral axis.

Question 15

The purpose of wing slats is to ____________.

Answer 15

reduce stalling speed.

Question 16

When inspecting a control cable turnbuckle for proper installation, determine that
_______.

Answer 16

the safety wire ends are wrapped a minimum of four turns around the
terminal end shanks.

Question 17

The purpose of the vertical fin is to provide ________.

Answer 17

directional stability.

Question 18

What is the smallest size cable that may be used in aircraft primary control
systems?

Answer 18

1/8 inch.

Question 19

Placing a piece of cloth around a stainless steel control cable and running it
back and forth over the length of the cable is generally a satisfactory method
of________________ .

Answer 19

inspecting for broken wires.

Question 20

With which system is differential control associated?

Answer 20

Aileron.

Question 21

Stability about the axis which runs parallel to the line of flight is referred to as

Answer 21

lateral stability.

Question 22

The purpose of spring tabs or servo tabs is to _____________.

Answer 22

assist the pilot in moving the control surfaces.

Question 23

Excessive wear on both of the sides of a control cable pulley groove is
evidence of _____________

Answer 23

pulley misalignment.

Question 24

After repairing or recovering a rudder, the surface should be rebalanced
_________.

Answer 24

to manufacturer’s specifications.

Question 25

Where would you find precise information to perform a symmetry alignment
check for a particular aircraft?

Answer 25

Aircraft service or maintenance manual.