Chapter 11 - Aircraft Magnetism

Question 1

What is Aircraft magnetism and how is it acquired? How is it caused?

Answer 1

magnetic field possessed by an aircraft.

acquired through the manufacturing process and use.

caused by the ferrous metals and electrical fields in the aircraft.

Question 2

What causes deviation?

Answer 2

• Mechanical faults
• Influence of the aircraft’s magnetic field.

Question 3

What is deviation?

Answer 3

angular difference between magnetic and compass headings.

Question 4

How is aircraft magnetism classified?

Answer 4

how readily it’s materials become magnetised and how they retain the magnetism:

• Permanent (HARD) Magnetism: permanent nature and not affected by heading or latitude.
• Electromagnetism (SOFT): temporary nature and affected by the Earth’s magnetism and the aircraft heading.

Question 5

Is permanent magnetism affected by heading or latitude when the aircraft is flying?

Answer 5

No

Question 6

Is electromagnetism affected by the aircrafts heading and latitude?

Answer 6

Yes - temporary nature

Question 7

What is a compass swing?

Answer 7

procedure, carried out to determine the amount by which the compass readings are affected by magnetism.

enables determination of the deviations, calculation of the respective coefficients, and compensation for deviations.

Question 8

What is the purpose of the compass swing?

Answer 8

• Determine deviations on certain headings;
• To correct / remove as much deviation as possible;
• To record the residual deviation which is left after the compass has been adjusted.

Question 9

The purpose of compass swinging is to determine the deviation of a magnetic compass on..?

Answer 9

ANY HEADING