TruTrak ADI Pilot II - Manual (Page 21)

TruTrak Flight Systems ADI Pilot I & II Autopilot Installation Manual
December 2009 19 8300-012 Rev B
Definitions
Note: Not all settings appear in every autopilot.
ACTIVITY (Setting range 0 – 24) The velocity at which the servo moves the control surface.
The higher the number the more movement you will see in the control surface.
With a standard servo (DSB-X, DSP-X) you should start at 0 then work your way
up in flight to set the level for your aircraft. The High Torque Servo (DSB-HB,
DSB-HC) has a different gear ratio, so an Activity setting of 12 will be equal to
about 0. With too low a setting the aircraft will hunt slowly and appear to be lazy.
With too high a setting the aircraft will hunt rapidly, and appear nervous and jittery.
TORQUE
(Setting range 0-12) The holding force that the servo has on the control surface.
This setting should not be too low; the reason is that the servo will not be able to
fly the aircraft in turbulence. The lower the setting the easier it is to override the
servo if you need to. It is recommended that the torque be set in moderate
turbulence, so that one can be certain that the level is not set too low.
BAUD RATE
(Setting Range 600-9600) This is the communication speed that must match your
GPS serial output setting. Most handhelds are 4800 and most panel mounts are
9600.
STATIC LAG
(Setting Range 0-2) This setting is used to compensate for lag in the aircraft static
system. This setting is usually not adjusted. This value is used to remove very
slow hunting, of more than 15 to 30 feet, in altitude hold when adjusting the
activity setting does not solve the problem. This is NOT the setting to adjust if
there is slight nose bobble in still air; the setting for that situation is HALF STEP.
We recommend factory assistance before adjusting this value.
MICROACTIVITY (Setting Range 0-32) This is used to remove the significant lost motion in the
control system, usually a cable control system. Most aircraft do not need this
changed from 0. An example of when one might need to adjust microactivity is: If
flying in still air, there is a very slight wing rock that can not be solved by adjusting
the ACTIVITY setting.
HALF-STEP?
(Setting Range N or Y) This setting will cause the servo to take smaller steps, but
will also reduce the torque available. Normally this setting is “N”, if the aircraft
nose moves up and down very slightly in VERY calm air, and it can be verified that
the servo is only moving one step for each “bobble” of the nose, then select “Y”.
Only very light aircraft that are extremely pitch sensitive will need to adjust this
setting.