6.10 Control Cables Flashcards
Where are control cables commonly used?
Smaller aircraft for flying and engine controls.
What is the benefit of control cables?
They have no play or loss of transmission and respond quickly.
What are some of the negatives of control cables?
Tensions adjusted regularly
Prone to wear
Tension varies with temp
How is a cable constructed?
Basic element is a strand made up of wires, strands make cables.
What happens when the strands and wires are wound in opposite directions?
The tendency to uncoil is reduced
What is a regular lay?
Opposite direction twist
What is lang lay?
When the strands are twisted around the core.
What is the minimum tensile strength of aircraft cables?
1200N/mm squared
How are cables designated?
By the number of strands
What are the four common types of steel cable used in aircraft?
Non-flex 1x7
Non-flex 1x19
Flex 7x7
Extra Flex 7x19
What is a 1x7 cable?
1 strand of seven wires
Where are flex cables used?
Straight runs or large pulleys
What is the most common type of cable used in aircraft?
Extra flex
What terminal fittings are available?
Threaded ends
Fork ends
Eye Ends
Single and double shank ends
What ends are used for connecting to turnbuckles and bell cranks?
Threaded end
Fork end
Eye end
What are ball terminals used for?
Attaching cable to quadrant
What are lock clad cables?
Swaging tubing to cable
What was lock clad designed for?
Eliminating sag and wear
What are turnbuckles for?
Minor adjustment
Why are cable tension regulators used?
To account for temp changes
What is a fairlead?
A type of grommet to protect cables when passing through structure.
What are bell cranks and quadrants used for?
Used in push/pull systems for a change direction or change mechanical advantage.
What are flexible control systems?
Push and pull systems
What two types of flexible control systems are there?
Bowden
Teleflex
