(–) keys until they do go the right direction.
Then press the
CURSOR
key again, and the
percent indicator will flash. Now you may
input the percentage of mixing. Start out with
10-20% and increase it until the corners in
your loops are square enough.
31. Programmable mixers: now take
advantage of your system’s custom
programming capabilities. You may use
programmable mixers (
PMXI
or
PMX2
, p. 35)
to get rid of unwanted tendencies (for
example, pitching up during knife-edge flight.
For pitching during knife-edge, you want to
apply up or down elevator when you are using
full rudder to sustain knife-edge. Thus, the
master channel is rudder, and the slave is
elevator.
To program this mixing, first get to the
PMXI
window. Press the
CURSOR
key once, then
press the (+) to activate it (a flashing
ON
or
OFF
will appear, depending on the position of
the Elev D/R switch, which turns mixer #1 on
and off).
Next, press the
CURSOR
key once, then press
the
DATA INPUT
key until the little arrow is
over the numeral 4, indicating CH4 (rudder) is
the master channel. Press the
CURSOR
key
once, then press the
DATA INPUT
key until the
little arrow is under the numeral 2, indicating
CH2 (elevator) is the slave channel.
Now, you’ll define the mixing direction. If
your model pitches up with knife edge, you’ll
want to input down elevator for rudder going
both directions. Move the rudder stick to one
side and see which way the elevator moves; if
incorrect, press the
CURSOR
key once, then
press the
DATA INPUT
keys until it moves
down. Repeat this by moving the rudder stick
to the other side. You’ll end up with a plus
sign for one rudder direction, and minus for
the other direction.
Finally you may input the amount of elevator
mixing on both sides by pressing the
CURSOR
key, then the (+) or (–) keys until a
small amount of mixing has been assigned.
Repeat this by moving the rudder stick to the
other side and verifying that the numbers
match for both directions.
Be sure you understand how to use the Elev
D/R to switch to turn the mixer on and off,
since you won’t want this mixing on during
normal flight, only during knife-edge. Later,
after you fly the model you may fine tune the
amount of elevator travel so that the pitching
tendency is eliminated.
The sky’s the limit — you’ll enjoy using your
T6XAs/XHs system!
Pattern Aircraft Flight Trimming Chart
The following chart may be used to systematically set up and trim a model for straight flight and
aerobatic maneuvers. Please note that for best results, trimming should be done in near-calm
conditions. Before you decide to make a change, be sure to try the test several times before
making adjustments. If any changes are made, go back through the previous steps and verify
that they are not also affected. If they are, make further adjustments as necessary.
To test for …
Test Procedure
Observations
Adjustments
1. Control
neutrals
Fly the model straight and
level
Use the transmitter trims for hands-off
straight & level flight.
Change electronic subtrims or
adjust clevises to center
transmitter trims.
– 23 –
Summary of Contents for 6XA
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