Dynon Avionics EFIS-D100 Installation Guide - Manual (Page 54)

Autopilot Installation and Configuration
 DOWN▼ > (SENSITIVITY value is highlighted)
 Press DEC - and INC + to adjust SENSITIVITY to preferred initial setting for the aircraft.
Step 3c – Set Roll Servo Turn Rate Limit: The ROLL SERVO > TRN RT LMT parameter
specifies the desired average turn rate for AP-commanded turns. For example, a setting of 3.0°/S
will ideally complete a 90° turn in 30 seconds. Due to flight dynamics and the time it takes the
Autopilot to initiate a turn, there may be points during a turn where the target Turn Rate Limit is
slightly exceeded. Turn Rate Limit is specified in °/s (average degrees of turn per second).
Minimum: 0.5°/s, maximum: 3°/s, default: 1.5°/s.
On the EFIS, perform the following (continuing from SENSITIVITY):
 DOWN▼ > (TRN RT LMT value is highlighted)
 Press DEC - and INC + to adjust TRN RT LMT to preferred initial setting for the aircraft.
Firmware version 5.3 introduces an alternate set of control algorithms which may
improve roll performance in some aircraft. To try this mode simply set TRN RT LMT to
0. The autopilot will more directly control bank angle instead of targeting a specific turn
rate. The maximum bank angle that the autopilot allows continues is still limited by the
BANK LIMIT parameter. In this mode, set the BANK ANGLE LIMIT to the maximum
value you want the autopilot to use in a turn (see below).
Step 3d – Set Roll Servo Bank Limit: The BANK LIMIT parameter specifies a maximum bank
angle which the AP will not exceed during turns. Setting an appropriate Bank Limit protects
against overbank conditions. If the BANK LIMIT setting is reached during a turn, the AP limits
the bank to that value and then reduces it as needed to complete the turn.
If BANK LIMIT is reached, the Turn Rate Limit (set previously) is ignored until the aircraft
returns to within 5º of level in the roll axis.
To choose an appropriate BANK LIMIT, calculate the bank angle that results from your desired
turn rate limit and cruising airspeed; then set the BANK LIMIT to at least 5° above this value. If
this bank angle value is a number that you are not comfortable with, decrease the target TRN RT
LMT (set above). Minimum: 05°; maximum; 45°, default: 35°.
On the EFIS, perform the following (continuing from TRN RT LMT):
 DOWN▼ >(BANK LIMIT value is highlighted)
 Press DEC - and INC + to adjust BANK LIMIT to preferred initial setting for the aircraft.
 BACK > EXIT
STEP 4 – PITCH SERVO INITIAL SETUP
We recommend that you perform the following on the
ground at zero airspeed.
Step 4a – Set Pitch Servo Torque: The PITCH
SERVO > TORQUE parameter specifies how much
torque the pitch servo will exert before slipping.
Servo slip is indicated by a yellow background on the
slipping axis in the AP status indicator. Torque must
be set high enough to prevent any slip due to air
6-18 EFIS-D100 Installation Guide