11.9 Flight Controls Flashcards
Three main axes of an aircraft
Lateral axis
Longitudinal axis
Vertical axis
Motions around the axes of an aircraft
Pitch
Roll
Yaw
Motion around the lateral axis
Pitch = nose up, nose down
Motion around the longitudinal axis
Roll = wing up, Wong down
Motion around the vertical axis
Yaw = nose left, nose right
Flight controls divided into two groups
Primary flight controls
Secondary flight controls
The primary flight controls
Ailerons
Roll spoilers
Elevators
Rudder
Ailerons consist of
Two ailerons and two sets of roll spoilers used for roll control
Cables must be inspected for
Broken wires
Worn areas
Corrosion
Broken wire on surface in the cable can be detected by
Rubbing a cloth back and forth along the cable
Forces that 1-cable transmission transmits
Pull forces
Most cable transmission systems used in aircrafts
2-cable transmissions
2-cable transmissions use what to transmit force
Quadrants
2 cable transmissions transmit what movement to the cables
Push and pull movements
Three main types of quadrant
Normal quadrants
Single quadrants
Tension regulators
The metal of a cable usually is
Steel
Cable tension regulator ensures
that the Tension in a cable system is kept constant at different temperatures
Cable tension regulator consists of
- Two quadrant halves, mounted on a common axle
- Spring loaded cross head, mounted on a guide
- Pull rods
On warm aircraft what does the cable tension regulator do
Compensates for the increased cable tension
On cold aircraft what does the tension regulator do
Compensates for the reduced cable tension
Cable pulleys are used to
Change the direction of the cable run
Pressure seals are used to maintain
Air tight seal around a cable that passes through a hole in a pressure bulkhead
Fairleads are used to
Guide and support a cable along its routing
Fairleads allow a maximum cable directions change of
3 degrees
Each cable has an
End fitting or terminal
End fittings are fastened to the cables using a
Swaging machine
Turnbuckle is used to
Connect two externally threaded barrel ends
Turnbuckles are locked in position with
Safety clips
Most mechanical transmission use a combination of
Rods and cable systems
Rods are used to transmit
Forces to and from the cable system
Adjustable rod and non-adjustable rod have
Threaded end fittings
Non-adjustable rods have a
Heat shrinkable sleeve
- prevents adjustment of the end fitting
Adjustable rods have
- Inner and outer lock washers
- A lock nut
- Inspection hole to check for minimum screw penetration
Chains are used to
Transmit forces to and from a cable system
Main component of a chain installation
- The chain
- The wheel
- The protection guards
Torque shafts are used to
Transmit torque for linear movements
Torque tubes are used to
Transmit torque for rotary movements
Torque tube system consists of
Several torque ties connected by couplings
Torque tube couplings compensate for
Axial movement and change of alignment
