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CAT B- Mod 6 Materials and Hardware > 6.10 Control Cables > Flashcards

6.10 Control Cables Flashcards

1
Q

Where are control cables commonly used?

A

Smaller aircraft for flying and engine controls.

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2
Q

What is the benefit of control cables?

A

They have no play or loss of transmission and respond quickly.

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3
Q

What are some of the negatives of control cables?

A

Tensions adjusted regularly
Prone to wear
Tension varies with temp

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4
Q

How is a cable constructed?

A

Basic element is a strand made up of wires, strands make cables.

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5
Q

What happens when the strands and wires are wound in opposite directions?

A

The tendency to uncoil is reduced

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6
Q

What is a regular lay?

A

Opposite direction twist

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7
Q

What is lang lay?

A

When the strands are twisted around the core.

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8
Q

What is the minimum tensile strength of aircraft cables?

A

1200N/mm squared

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9
Q

How are cables designated?

A

By the number of strands

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10
Q

What are the four common types of steel cable used in aircraft?

A

Non-flex 1x7
Non-flex 1x19
Flex 7x7
Extra Flex 7x19

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11
Q

What is a 1x7 cable?

A

1 strand of seven wires

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12
Q

Where are flex cables used?

A

Straight runs or large pulleys

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13
Q

What is the most common type of cable used in aircraft?

A

Extra flex

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14
Q

What terminal fittings are available?

A

Threaded ends
Fork ends
Eye Ends
Single and double shank ends

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15
Q

What ends are used for connecting to turnbuckles and bell cranks?

A

Threaded end
Fork end
Eye end

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16
Q

What are ball terminals used for?

A

Attaching cable to quadrant

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17
Q

What are lock clad cables?

A

Swaging tubing to cable

18
Q

What was lock clad designed for?

A

Eliminating sag and wear

19
Q

What are turnbuckles for?

A

Minor adjustment

20
Q

Why are cable tension regulators used?

A

To account for temp changes

21
Q

What is a fairlead?

A

A type of grommet to protect cables when passing through structure.

22
Q

What are bell cranks and quadrants used for?

A

Used in push/pull systems for a change direction or change mechanical advantage.

23
Q

What are flexible control systems?

A

Push and pull systems

24
Q

What two types of flexible control systems are there?

A

Bowden
Teleflex

25
Q

What is a bowden cable?

A

Inner steel cable free to move in a outer housing typically heavy gauge steel wire

26
Q

What are bowden cables prone too?

A

Water freezing in the housing

27
Q

What is important to do with bowden cables after installation?

A

Readjust after first movements as they stretch.

28
Q

What are teleflex used for?

A

Operate components such as the engine, prop controls, trim controls and fuel valves.

29
Q

What are the three types of teleflex?

A

DS 23/2
DS 380
DS169330

30
Q

What is the minimum breaking load of DS23/2 teleflex?

A

204kg

31
Q

What is the minimum breaking load of DS380 cable?

A

454kg

32
Q

Where are DS 169330 teleflex used?

A

Hot areas

33
Q

In a single entry unit what is the minimum degrees of engagement between gear teeth and the cable?

A

40 degrees

34
Q

In a double entry unit where does the end of the cable go?

A

Spent travel tube

35
Q

What do junction box units allow?

A

Change of direction or control of two components.

36
Q

What is an anti torsion tube?

A

To stop the cable twisting.

37
Q

Where are swivel joints used?

A

Where rotary movement of the control lever at the receiving end does not exceed 90 degrees

38
Q

How is a cable attached to a sliding end fitting?

A

By means of a special collet or lock spring and plug

39
Q

How can the rotary motion of a torsion drive be converted to linear?

A

Trimming tab, a sprocket driven screw jack

40
Q

What is a quick break unit?

A

Used to facilitate removal of components without disturbing the control.

CAT B- Mod 6 Materials and Hardware (14 decks)

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