TRIM:COM (Flight Modes)
D/R:SW (Flight Modes)
A9
The TRIM:COM parameter can be toggled back and
forth between COM and FM by pressing the Selector
when COM or FM is highlighted. If left in the COM
mode, the digital trims for Elevator, Ailerons, and Rudder
are Common or shared by the 3 Flight Modes. If FM
is selected, the XP9303 keeps track of the digital trims
independently for each Flight Mode, which means the
pilot can re-trim the aircraft using the digital trims
for each Flight Mode. This is a very useful feature if
switching between Flight Modes causes the aircraft’s trim
to change, such as when flaps are deployed by one of
the Flight Modes causing a slight roll. In this case, the
pilot can simply use the Aileron digital trim to trim the
Ailerons, eliminating the roll tendency when that Flight
Mode is selected. Selecting other Flight Modes brings in
a corresponding set of trims, ensuring the aircraft stays
in trim as the pilot changes between the 3 Flight Modes
during flight.
1. If Flight Modes are only going to be used to switch
between 3 sets of Dual Rates/Exponential settings,
then leave the TRIM parameter set to COM. If other
functions are to be controlled by Flight Modes which
may have a tendency to cause the aircraft trim to
change, then select FM for the TRIM parameter. The
example below shows FM selected, meaning that each
Flight Mode has its own set of trims. The setting can
be changed at any time by returning to this display.
Note: When trims are set to FM, be especially
careful during the first flight of an aircraft to
remember that the aircraft will need to be trimmed
using the digital trims for Aileron, Elevator and
Rudder for each Flight Mode selected during flight.
If the aircraft is badly out of trim, it will probably be
badly out of trim for each Flight Mode selected. If the
out-of-trim condition is very severe, it might be wise
to land after trimming the first Flight Mode and then
note the trim settings. Switch to the other 2 Flight
Modes and match the trims to these settings before
flying again.
2. The D/R:SW parameter may be toggled between SW
and FM by pressing the Selector when SW or FM
is highlighted. If left in the SW mode, then the 3 Dual
Rate switches will be used to select Dual Rates and
Exponential settings for Elevator, Ailerons, and Rudder
and there will only be 2 sets of Dual Rates/Expo
settings for each control. If FM is selected, the Flight
Mode switch will be used to select Dual Rates/Expo
settings for all three controls at once (Elev, Aile, Rudd
- D/R settings ganged together on the Flight Mode
switch) and there will be 3 sets of D/R/Expo values
available for each control.
3. If individual D/R switches (3 switches) to control only
2 sets of rates and curves for Elevator, Ailerons and
Rudder are desired, set this parameter to SW. If 3
sets of rates and curves that are selectable by a single
Flight Mode switch are desired, then set this parameter
to FM. This setting may be changed at any time by
returning to this display.
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