Trio Avionics Pro Pilot - Manual (Page 60)

Trio Pro Pilot Manual 3.8
60
Vertical Trim Motor Speed / Direction
If the option vertical trim has been purchased the Vertical Trim Speed and Direction menu screen shown
below will be visible. This option allows setting both the trim motor speed and the direction of rotation of
the user supplied trim motor.
This screen allows adjustment of the trim motor speed depending on the speed of the aircraft. Typically,
pilots prefer a faster trim movement at the lower airspeed range and slower trim movement at a higher
airspeed. The trim speed and direction menu selection allow customizing the trim speed to your
particular aircraft.
The screen acronyms and their meaning is as follows:
TL
= Speed of trim movement at or below the Low Airspeed Setting
TH = Speed of the trim movement at or above the High Airspeed Setting
D = Trim direction setting (“N”, normal, “R”, reverse)
LAS = Low Airspeed Setting (range 40 to 240 kts)
HAS = High Airspeed Setting (range 40 to 240 kts)
The following limitations must be observed to prevent abnormal trim operation:
1.) If the TL setting is set below “4” the Trio Pro trim function is disabled.
2.) TL setting must be equal or greater than the TH setting
3.) LAS setting must be less than the HAS setting.
4.) Depending upon how the trim motor is wired and mechanically linked, the proper direction of
rotation of the trim servo must be assured.
To set the speed of the trim movement and direction, perform the following steps:
1. Enter the CONFIGURATION SETTINGS menus as detailed previously and select the trim
menu shown
2. Press and release the H MODE button. The arrow
will be placed at the TL speed setting field.
 Adjust trim movement for low speed flight. A lower number will allow for a slower response
(speed of trim movement) to trim errors or pilot input. A higher number will allow a faster
response to pitch trim errors or pilot input.
3. Press and release the H MODE button. The arrow will be placed at the TH speed setting field.
 Adjust trim movement for high speed flight. A lower number will allow for a slower response
(speed of trim movement) to trim errors or pilot input. A higher number will allow a faster
response to pitch trim errors or pilot input.
4. Press and release the H MODE button. The arrow will be placed at the Trim Direction (D)
setting field.
 Toggle the trim motor direction normal (N) or reverse (R) by momentarily pressing the
ENCODER button.
 Turning
the ENCODER while on this display field will cause movement of the trim motor in
the selected direction for verification of proper movement. Rotating the encoder clockwise
should induce “up” trim and counter-clockwise should induce “down” trim.
NOTE: The trim direction selection is locked if the aircraft is in a flight condition to prevent reversing this
setting in flight. Ensure this setting is accomplished on the ground prior to flight.