- #1
rajeshmarndi
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When an aircraft heading east/west accelerates, it shows false northerly direction, similary on deacceleration shows southerly.
I know the magnet in the aircraft, dip (not at the equator) bcoz it tries to align with the magnetic lines. To avoid this, the magnet needle is pivoted to a float around which is mounted a compass card in a fluid and an dip-compensating weight(this is where the cg is) just below the pivot. I'm not sure if i have explained the arrangement correctly.
Since the pivot and cg do not coincide, it shows tha above error on acceleration and deacceleration.
Lets take on east heading the aircraft accelerate, since it shows falsely northerly direction, the compass card rotate CW, so why does it rotate CW and not CCW?
also why does the compass card tilt forward, when it is floating in the fluid.
the picture of the compass tilting forward can be viewed at http://www.pilotsweb.com/navigate/art/accel.jpg
I know the magnet in the aircraft, dip (not at the equator) bcoz it tries to align with the magnetic lines. To avoid this, the magnet needle is pivoted to a float around which is mounted a compass card in a fluid and an dip-compensating weight(this is where the cg is) just below the pivot. I'm not sure if i have explained the arrangement correctly.
Since the pivot and cg do not coincide, it shows tha above error on acceleration and deacceleration.
Lets take on east heading the aircraft accelerate, since it shows falsely northerly direction, the compass card rotate CW, so why does it rotate CW and not CCW?
also why does the compass card tilt forward, when it is floating in the fluid.
the picture of the compass tilting forward can be viewed at http://www.pilotsweb.com/navigate/art/accel.jpg
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