Aircraft Magnetism Flashcards
The 4 factors that will affect the nature of permanent magnetism induced during aircraft construction is?
- Aircraft magnetic heading during construction
- Magnetic Latitude or angle of dip at the factory
- The amount of magnetic material in the aircraft
- The amount of vibration during construction
An aircraft have a blue pole in the nose, horizontal long iron in the longitudinal axis, heading 090 degrees. Deviation will be?
Easterly
An aircraft have a blue pole in the nose, horizontal long iron in the longitudinal axis, heading 180 degrees. Deviation will be?
Zero
An aircraft have a blue pole in the nose, horizontal long iron in the longitudinal axis, heading 270 degrees. Deviation will be?
Westerly
An aircraft have a red pole in the nose, horizontal long iron in the longitudinal axis, heading 090 degrees. Deviation will be?
Westerly
An aircraft have a red pole in the nose, horizontal long iron in the longitudinal axis, heading 180 degrees. Deviation will be?
Zero
An aircraft have a red pole in the nose, horizontal long iron in the longitudinal axis, heading 270 degrees. Deviation will be?
Easterly
An aircraft have a blue pole on the right side, horizontal hard iron in the lateral axis, heading 090 deviation will be?
Zero deviation.
An aircraft have a blue pole on the right side, horizontal hard iron in the lateral axis, heading 180 deviation will be?
Maximum westerly
An aircraft have a blue pole on the right side, horizontal hard iron in the lateral axis, heading 360 deviation will be?
Maximum easterly
If Q = + 5, then deviation on 045 degrees = ?
+ 5 cos(045) = + 3.54
If P = + 5, then deviation on 045 degrees = ?
+ 5 sin(045) = + 3.53
The magnetic coefficient that is constant throughout all headings is called?
Coefficient A
The magnetic coefficient that is affected by aircraft magnetism?
Coefficient B and C
Coefficient B = ?
Deviation on east - deviation on west / 2
If the coefficient B deviation have been found, does on adjust it magnetically using the micro-adjustor on the compass?
No
Coefficient B relates to?
Parameter P
Coefficient C relates to?
Parameter C
Coefficient C = ?
Deviation north - deviation south / 2
Magnetic heading =
089
270
Compass heading =
086
273
Calculate coefficient B
Deviation on east - Deviation on west / 2
+3 -3 / 2 (Make the second deviation value expression same as the first) =
+3 +3 / 2 =
6 /2 =
Coefficient B of +3
Magnetic heading =
001
180
Compass heading =
004
175
Calculate coefficient C
Deviation on North - Deviation on South / 2
- 3 +5 / 2 =
- 3 -5 (Make the second deviation value expression same as the first) / 2 =
- 8 /2 =
Coefficient C of - 4
When conducting a compass swing, what must be done to the coefficient value before it’s applied to the compass heading?
The coefficient value must be reversed.
Magnetism during aircraft construction tend to align?
Itself with the magnetic meridian
A positive parameter sign is used to indicate?
When deviation causes the compass needle to move in a clockwise direction, and its north seeking end to dip.
An aircraft obtains hard iron magnetism during construction while in an easterly heading, the blue pole will be where?
The blue pole will be on the right wing, facing the magnetic South, and the red pole on the left wing facing magnetic North.
Compass deviation is when?
The compass North differs from the Magnetic North
