Dynon Avionics EFIS-D10A Installation Guide - Manual (Page 60)

Autopilot Installation and Configuration
6-20 EFIS-D10A Installation Guide
 Pitch Gain: Use only after sensitivity is set as well as it can be. Increase gradually if
airplane does not settle on altitude. The default setting is 20.
 Altitude Gain (ALT GAIN): Use only after sensitivity and all of the above settings are set
as well as they can be. Increase gradually if airplane levels off too soon. Reduce
gradually if airplane overshoots altitudes after climbs and descents. The default setting is
6.
 Pull Rate: Use only after sensitivity and all of the above settings are set as well as they
can be. Controls the rate the AP will push or pull when changing vertical speed. The
default setting is 10.
 VSI Gain: Use only after sensitivity and all of the above settings are set as well as they
can be. Increase gradually if overshooting altitude after climbs or descents, decrease if
rounding out too early. The default setting is 15.
 G Error Gain (G ERR GAIN): Use only after sensitivity and all of the above settings are
set as well as they can be. Increase gradually if vertical speed changes are not smoothed
enough; Decrease if ride is too harsh. G Error Gain adjustments affect the most
noticeable changes while the aircraft is in turbulence. The default setting is 10.
 G Error Limit (G ERR LIM): Use only after sensitivity and all of the above settings are
set as well as they can be. Controls the max additional G the autopilot will push or pull to
control vertical speed (up to the G limiter). G Error Limit adjustments affect the most
noticeable changes while the aircraft is in turbulence. The default setting is 25.
Step 4c – Set Airspeed Minimum: The PITCH SERVO > AIRSP MIN parameter must be set to
at least (and defaults to) 30% above V
S1
, which should be set to the specifications of your
aircraft in the EFIS > SETUP > IASCLR menu. The AP cannot be engaged at airspeeds below
Airspeed Minimum, with the exception of 0 knots, allowing for ground testing. When flying at
airspeeds lower than AIRSP MIN, the AP status indicator displays “SPD” for both axes, and
cannot be engaged.
When the AP is engaged and aircraft airspeed drops below the minimum, the AP enters an
airspeed hold mode, sacrificing altitude hold performance to maintain the minimum airspeed.
When the aircraft’s altitude drops below the target ALT bug and the AP cannot pitch the aircraft
up without dropping below the minimum airspeed, the EFIS presents the prompt:
MIN AIRSPEED – ADD POWER
Airspeed Minimum is specified in knots, kilometers/hr, or miles/hr, depending on the units
chosen in the EFIS > SETUP > UNITS > IAS menu. Minimum/default: 30% above V
S1
.
To set the AIRSP MIN, perform the following (continuing from Pitch Servo Sensitivity):
 DOWN▼ > (AIRSP MIN: value is highlighted)
 Press DEC - and INC + to adjust APRSP MIN to preferred initial setting for the aircraft.
Step 4d – Set Pitch Servo Airspeed Maximum: The PITCH SERVO > AIRSP MAX
parameter cannot be set to a value above 95% of V
NE
, which should be set to the specifications
of your aircraft in the EFIS > SETUP > IASCLR menu. The AP cannot be engaged at airspeeds
above Airspeed Maximum. When flying at airspeeds above AIRSP MAX, the AP status
indicator displays “SPD” for both axes, and cannot be engaged.