Trio Avionics Pro Pilot - Manual (Page 52)

Trio Pro Pilot Manual 3.8
52
NOTE: As a safeguard, the servo direction cannot be set while airborne. When airspeed or GPS
groundspeed is present, the NORM and REV messages do not appear and this function is
disabled
.
If the aileron center number is near the extremes, it might be necessary to check the mechanical
servo linkage. With the ailerons centered the number should be near somewhere near 7500.
Selecting Airspeed or Vertical Speed for PCS
The AS (airspeed)/VS (vertical speed) select screen allows setting of the mode of the PCS steering
function.
When the PCS mode is activated (by pressing and holding the servo disconnect switch for greater than 5
seconds while the servos are active) the autopilot could be placed into one of three different modes.
 If the selection is to VS and the vertical rate is in excess of 200 feet per minute, either up or
down, then the autopilot will capture the current vertical rate.
 If the selection is to AS, and the vertical rate is in excess of 200 feet per minute, either up or
down, and the then the autopilot will capture and maintain the current indicated airspeed. *This
is useful for maintaining a constant airspeed for engine cooling in a prolonged high power climb
condition.
 If the vertical rate is less than 200 feet per minute in either selection, then the ALTITUDE HOLD
mode will become active.
To set the AS or VS selection, perform the following steps:
1. Enter the CONFIGURATION SETTINGS menus as
detailed previously and select the AS/VS SELECT
menu.
2. Press and release the H MODE button. The arrow
will be placed at the AS(VS) field
3. Rotate, or press the encoder to change the selection
4. Press and release the H MODE button.
The AS/VS SELECT procedure is complete and the encoder can now be used to select another menu
screen
.
Setting Maximum Turn Rate
A “standard rate turn” of 3 degrees per second may result in a comfortable bank angle at 130 knots, but
as speed increases the bank angle must be increased to achieve the standard rate of turn.
In faster aircraft this steeper bank may be uncomfortable to some pilots and, indeed, may exceed the
capability of an altitude hold system to maintain altitude properly in the turn. To remedy this, the Pro
Pilot has a means whereby the users can adjust the maximum rate of turn to their personal satisfaction.
When shipped, the Pro Pilot is defaulted to an “automatic” mode where the actual turn rate is
automatically adjusted based on groundspeed (as measured by your GPS) to limit the bank angle to
approximately 15 to 20 degrees. For aircraft cruising at groundspeeds of 140 knots or greater the
automatic mode will decrease the allowable turn rate to keep the aircraft bank angle at a comfortable
maximum of approximately 15 degrees. Slower speeds will allow a standard rate turn of 3 degrees per
second.