6.10 Flashcards
What are steel wires twisted into?
Strands
What are strands twisted into?
Cables
What direction are wires and strands twisted in?
The opposite to each other
If a cable is said to be 7x19 what does this mean?
The cable is made up of 7 strands of 19 wires each
What is a tensiometer?
A device used to measure the tension of cables
How are metal cable terminals attached to the end of cables?
They’re swayed on by plastic deformation of their hollow shanks
What are fairleads used for?
To guide control cables to prevent damage to aircraft structure
What is used when control cables pass through a pressure bulkhead?
Pressure seals
When are pulleys used on control cables?
When a change of direction is required
What are cable turnbuckles used for?
To make minor adjustments in cable length and tension
How can you identify which cable is a left hand thread on a turnbuckle?
It will have a groove or knurl around the end of the barrel
What is special about the teleflex control cable?
It can push and pull
What is a single entry unit in relation to an end fitting?
It’s when a teleflex cable finish’s in a unit that turns it into rotational movement
What is the minimum engagement for a single entry unit?
40°
What is a double entry unit?
When a teleflex cable needs too turn 90-180°
What does a anti-torsion tube do?
It stop teleflex cable rotating
What is a straight lead unit?
When the teleflex cable carries on its route but a gear wheel is needed for something
What is a junction box unit?
When two teleflex cables enter the same unit to run off the same gear wheel
What are swivel joints?
A unit that holds the end of a control cable but can freely rotate
Why are quick break units installed?
To be able remove components without disturbing the control
What makes the Bowden control cable different to the teleflex cables?
Bowden cables can only pull and are pushed back by springs
What are the four parts to a Bowden control cable?
- coiled wire
- cotton braiding
- waterproofing
- end caps
What is a Bowden junction box used for?
When you want to connect a single cable to two cables
If Bowden control cables are longer than 2ft how often should they be supported?
Every 12in
