Trio Avionics EZ Pilot - v 2.3 - Manual (Page 36)

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FINE CRS QLT= 1
FINE TRK QLT= 2
FINE CRS QLTX 3
FINE TRK QLT=
2
FINE TRK QLT= 3
FINE CRS QLTX 3
degrees of the desired course. It has no effect outside of 5 degrees of the selected
course heading.
2. FINE TRK QLT: Fine track quality. This adjustment controls how sensitive the
system is to commands when in the Track (TRK) mode, and within .07 miles of the
track centerline. It has no effect outside of .07 miles.
3. PULL IN: Pull In controls system response when the aircraft is outside of the .07
miles crosstrack error or showing greater than 5 degrees of error to the selected
course.
These settings should normally have to be set up only once, during your first test flight.
To adjust the settings it is necessary to enter the “Calibration Menu” as follows:
Press the “DISPLAY” button and hold it in for 6 seconds. After six seconds the flight time
and /or calibration screens will be displayed. If the flight time screen is displayed,
momentarily press the DISPLAY button until the below screen is on the display
If you wish to change the gains you can gain
access to them by using the following
procedure:
To change the gain of the FINE CRS QLT,
you must press the MODE switch once.
This will replace the equal sign (=) with a
triangle or “arrow” that indicates that the gain
number can be changed by using the L-R switch. You can increment the number,
increasing the gain, by momentarily pressing the L-R switch to the right. Pressing the
button to the left will decrement the gain value. When adjusting the gain number it is best
to increment or decrement by a count of 1 and then observe the aircraft response.
To change the gain of the FINE TRK QLT,
press the MODE switch again. This will
advance the arrow to the next line and
allows use of the L-R switch to adjust the
Fine Course Quality gain.
It is important to note that, while viewing the calibration screens, you cannot change from
the “Track” mode to the “Course” mode or visa versa. This is because the MODE switch
is devoted to gain adjustment while in the calibration screens. Therefore it is necessary
to select the MODE you wish the autopilot to fly (Track or Course) before entering the
calibration function.
For instance, assume that you are flying in the CRS mode (in smooth air) and you find
that the aircraft “wanders” a few degrees to the left and right. You may wish to enter the
calibration screens to adjust the FINE CRS QLT gain to lessen the deviations. Additional
gain may improve the performance, but be aware that too much gain may also cause
oscillations. You should adjust it to find the “sweet spot” for your aircraft where it holds
the course best. Use the following procedure.
CRS MODE GAIN SETTING
1. Verify the in-flight SERVO POS per the manual procedures
2. Select the CRS mode and allow the airplane to stabilize on the selected
groundtrack (TRK) for a few minutes
3. Select the CALIBRATION screens (press and hold the DISPLAY button until