7.13 Flashcards
What is an advantage of cable lines over other mechanical actuators?
Predominantly weight saving.
Cables used in aircraft normally consists of individual cable wires with minimum tensile strength of what?
1200 N/mm (and breaking elongation of 2-7%)
What do the numbers mean in a 7x19 cable?
7 strands, 19 wires.
What size do the wooden drums need be which cables are supplied on?
40 times the diameter of the individual cable itself.
How many times the cable diameter should lengths of cable be coiled into radii of?
Less than 50 times. (And diameter of less than 150mm)
What are the permitted limits for broken wires for class 7x19 cable?
6 broken wires in same one inch (worn to 50% or more of their diameter) with not more than 3 broken wires for each strand.
What are the permitted limits for broken wires for class 7x7 cable?
3 in the same inch (worn to 50% or more of their diameter), no more than 2 for each strand.
How many broken wires are allowed for lengths of cables which go through fairleads and pressure seals or touch pulleys?
No more than 3.
If a wire is worn to more than 60% of its diameter what it is called?
A broken wire.
For a pulley with diameter less than 80mm, what must the wobble not be more than?
0.25mm
For a pulley with diameter of 80mm or more, what must the wobble not be more than?
Not more than 0.30mm
On a cable swaging roller, what is the designation for the rolling disc with 2 PINS?
LOWER
On a cable swaging roller, what is the designation for the rolling disc with 2 HOLES?
UPPER
What are rolled on balls and terminals checked for sufficient tensile strength with?
Cable Terminal Pull Tester
How long should the full test load on a Cable Terminal Pull Tester be applied for?
5 seconds.
