AIRCRAFT STRUCTURAL ASSEMBLY AND RIGGING Flashcards
This refer to the longitudinal (fore and aft) structural members of a semi
monocoque fuselage are called __________.
longerons and stringers.
The vertical flight of a helicopter is controlled by _____________.
collective pitch changes.
The acute angle formed by the chord line of a wing and the relative
wind is known as the _____________.
angle of attack.
A helicopter in forward flight, cruise configuration, changes direction
by______.
tilting the main rotor disk in the desired direction.
Main rotor blades that do not cone by the same amount during rotation are said
to be out of ____________.
track.
Movement about the longitudinal axis (roll) in a helicopter is effected by
movement of the__________.
cyclic pitch control.
Movement about the lateral axis (pitch) in a helicopter is effected by movement
of the _________.
cyclic pitch control.
An airplane which has good longitudinal stability should have a minimum
tendency to__________.
pitch.
An airplane is controlled directionally about its vertical axis by the…
Rudder.
The elevators of a conventional airplane are used to provide rotation about the.
lateral axis.
The chord of a wing is measured from________.
leading edge to trailing edge.
When the lift of an airfoil increases, the drag will_____.
also increase.
What physical factors are involved in the aspect ratio of airplane wings?
Span and chord.
Improper rigging of the elevator trim tab system will affect the balance of the
airplane about its____________.
lateral axis.
The purpose of wing slats is to ____________.
reduce stalling speed.
When inspecting a control cable turnbuckle for proper installation, determine that
_______.
the safety wire ends are wrapped a minimum of four turns around the
terminal end shanks.
The purpose of the vertical fin is to provide ________.
directional stability.
What is the smallest size cable that may be used in aircraft primary control
systems?
1/8 inch.
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________________ .
inspecting for broken wires.
With which system is differential control associated?
Aileron.
Stability about the axis which runs parallel to the line of flight is referred to as
lateral stability.
The purpose of spring tabs or servo tabs is to _____________.
assist the pilot in moving the control surfaces.
Excessive wear on both of the sides of a control cable pulley groove is
evidence of _____________
pulley misalignment.
After repairing or recovering a rudder, the surface should be rebalanced
_________.
to manufacturer’s specifications.
Where would you find precise information to perform a symmetry alignment
check for a particular aircraft?
Aircraft service or maintenance manual.
