Assembly and Rigging Flashcards
What are three types of commonly used flight control systems?
Cable, push-pull and torque tube systems. Cable is most popular because deflections in the structure does not adversely affect its operation.
What is used in large metal aircraft to keep control cable tension within acceptable limits.
Temperature expansion in large aluminum aircraft affects tension in steel control cables. A cable tension regulator maintain a given cable tension. These units consist of a compression spring and a locking mechanism.
What is a fairlead?
A fairlead is a guide for straight cables through or between structural member of an aircraft. No more than a 3 degree deflection from a straight line.
Where does breakage of control cables occur most often?
Breakage of wire strands occurs most frequently in areas where the cable passes over pulleys and through fairleads.
Which flight control surfaces are considered the primary group?
Elevators, ailerons, and rudder.
Which flight controls are considered the secondary group?
Wing flaps, trim tabs, spring tabs, servo tabs, and antenna servo tabs.
Which flight controls are included in the auxiliary group?
Flaps, speed breaks, spoilers, slats, leading edge flaps and slots.
How do wing flaps affect landing speed and approach angle of an aircraft?
Flaps increase the camber of the wing and give more lift at slower speeds, decreasing the stall speed. This also allows for a steeper glide angle during approach.
What is a balance tab?
Auxiliary control designed to move the tab in the opposite direction of the primary control surface, assisting the pilot in moving the control surface.
What is a trim tab?
Auxiliary control at the trailing edge of the control surface positioned by the pilot to reduce workload in maintaining desired flight attitude.
What it the purpose of the collective pitch control in a helicopter?
Used to change the lift (pitch) of the main rotor blades.
What unit on a helicopter is used to compensate for torque created by the main rotor?
The tail rotor.
What control operates the helicopter tail rotor?
Anti-torque petals.
What are the three axis of an aircraft, and which control surfaces cause the aircraft to move about each axis?
Vertical, Longitudinal, and Lateral. Rudder moves aircraft about the Vertical (yaw), Ailerons about the Longitudinal (roll), and Elevators about the Lateral (pitch).
When installing an aircraft bolt, what precaution would you take regarding the position of the bolt?
Bolt head up or forward,
