Trio Avionics EZ Pilot - v 2.3 - Manual (Page 37)

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PULL IN = 8
screens are displayed)
4. Use the MODE button to select the FINE CRS QLT parameter
5. Increase this number one count
6. Exit the calibration screens (press and hold DISPLAY until the normal nav screen
returns
7. Observe tracking performance. If the oscillation increases return to step 3 and
lower the FINE CRS QLT setting by two counts (original count minus one)
8. Repeat steps 3 to 7 until best tracking is obtained. Normally the EZ Pilot will hold
the groundtrack within +/- 1 degree in smooth air
You should then adjust the FINE TRK QLT for best performance while in the Track
mode. To do this you must first exit the calibrations screens, back to the normal autopilot
functions. Here you should place the autopilot in the Track (TRK) mode and allow the
aircraft to stabilize on the track that you have selected on your GPS flight plan. Once the
aircraft is stabilized, press the DISPLAY switch and hold it for 6 seconds to enter the
calibration screens, where you can adjust the FINE TRK QLT. You should increment
and decrement the number by one digit at a time and observe the effect on aircraft
tracking. Use the following procedure:
TRK MODE GAIN SETTING
1. Select the TRK mode an fly to a waypoint about 50 miles or greater distance
2. Allow the airplane to stabilize on the track centerline. Normal smooth air
performance is 0.0+/- 0.03 miles either side of track, and typically you will see
0.00 to 0.01 most of the time
3. Select the CALIBRATION screens (press and hold the DISPLAY button until
screens are displayed)
4. Use the MODE button to select the FINE TRK QLT parameter
5. Increase this number one count
6. Exit the calibration screens (press and hold DISPLAY until the normal nav screen
returns
7. Observe tracking performance. If variation around track centerline increases
return to step 3 and lower the FINE TRK QLT setting by two counts (original
count minus one)
8. Repeat steps 3 to 7 until best tracking is obtained
Pressing the MODE switch again will bring up the next calibration screen.
Here again, pressing the MODE switch will
replace the equal (=) sign with an arrow and
allow the value to be changed using the L-R
switch.
To exit the calibrations screens, simply press the display switch and hold it for 6 seconds.
This will bring you back to the normal autopilot display.
The PULL IN gain may be adjusted if you feel the aircraft is not responding appropriately
when you request large course changes. As an example, assume that you are in the
course mode and you use the L-R switch to program a 90 degree course change.
Initially, the aircraft will establish a constant turn rate which will decrease as it
approaches the correct course. If you feel that the “pull in” after the turn shallows is too
slow, you might wish to increase the PULL IN gain. If it is overshooting the new course,
you may wish to lower the PULL IN gain.