Dynon Avionics EFIS-D10A Installation Guide - Manual (Page 69)

Autopilot Installation and Configuration
During an AP-commanded climb, observe the AP status indicator as you did in step 9e; if
excessive slipping is observed (indicated by a yellow highlight around the ALT status), then
Repeat s
not disp
of
is an
increase the pitch servo’s TORQUE parameter. Repeat this verification in a descent.
the AP-commanded climbs/descents and torque adjustments until the ALT indicator doe
lay a slip indication.
Continue performing AP-commanded climbs and descents, and observe the overall behavior
the aircraft. If the aircraft oscillates in holds or overshoots as it reaches target altitude, that
indication that the Pitch Servo SENSITIVITY needs to be increased. If, upon reaching the target
altitude the stick “twitches” excessively, that is an indication that the Roll Servo SENSITIVITY
needs to be decreased.
You should be able to find a SENSITIVITY value that is acceptable for altitude hol
climbs, and descents in smooth air. You may, however, find that in periods of extended
turbulence, a lower SENSITIVITY value must be set.
Step 9h – Verify AIRS
ds,
P MIN/MAX, and VSPD MAX settings during altitude changes
tions given the setting for the VSPD MAX parameter. For example, when VSPD MAX is
e climb
ft
Pitch S
er
K
the
yellow UP
in
ght). This
l
During an AP-commanded climb, verify that the time to complete the climb matches your
expecta
set to 500 ft/min, a 500-foot climb should take about 1 minute. If this is not the case, th
rate may be limited by the AIRSP MIN parameter, and the ADD POWER message is displayed.
Likewise, during an AP-commanded descent, verify that the time to complete the descent
matches your expectations given the setting for the VSPD MAX parameter. If it does not, the
descent rate may be limited by the AIRSP MAX parameter, and the DECREASE POWER
message is displayed.
If necessary, adjust the AIRSP MIN, AIRSP MAX, and VSPD MAX parameters as described
above.
At this point, all the parameters in the AP > PITCH SERVO menu are properly tuned.
Step 9i – Execute several AP-controlled changes of altitude and observe the overall aircra
performance.
There may be some interaction between Pitch Servo Torque and
Repeat the above steps as necessary to achieve acceptably smooth ov
altitude holds and changes.
Step 9j – Observe and verify trim indications during altitude holds and changes
ervo Sensitivity settings.
all AP response during
Find an area with a lot of clearance above and below the aircraft’s altitude. With the AP
disengaged, put the aircraft into neutral trim. Engage the AP in ALT mode (and HDG or TR
mode if desired) and allow the AP to maintain altitude (and heading, if engaged). Trim
aircraft nose down; the AP will maintain the target altitude, despite
the nose down trim. Continue trimming nose down just until a
▲ indicator displays (and stays on) next to the AP status
dicator at the lower left of the EFIS screen (shown at ri
indicator displays when the AP senses too much nose down trim. Trim the aircraft nose up unti
the indicator disappears. Disengage the AP to observe the state of the aircraft’s trim.
EFIS-D10A Installation Guide 6-29