HITEC OPTIC 6 - ADIF - Aileron Differential

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A
ir
p
lane Model Function Descri
p
tions
5. If the left ( CH6 ) flaperon moves correctly wi
t
h aileron stick,
go
to the next step. Otherwise, change the its travel direction
by
pressing the Cursor Right key (the little arrow moves
under
the 6 ), press the Active/Inhibit (Clear) key (sets 0%),
then
press the Data -Decrease key until you reach -100%.
as 0% down, and the ailerons will move up only.
This
is preferred over reducing the up travel, which reduces
the
roll rate.
9. You must repeat this procedure for the left flaperon also.
Press
the Cursor Right key one time, so the little arrow
moves
under the 6 indicating the left ( CH6 ) flaperon. Move
the
stick to the Right and as before, press the Data
-Decrease key until you get to 50-75%.
6. Now you'll input the amount of flap response on the flaperons.
The
flap motion is commanded by the Right Lever on the right
side
of the case (near your right-hand index finger), and both
flaperons should move the same direction when you move the
lever. Press the Cursor Right key one time, so the little arrow
moves
over the 6 indicating flaps are now the master channel.
Note the arrow under the 6 as well, indicating left ( CH6 )
flaperon. Now you may adjust the amount of left flaperon
travel with the Data +Increase and
-Decrease keys. Press Active/Inhibit (Clear) key if you wish
to
reset to 0%). You may need to choose negative values to
get
the control to travel the correct direction.
7. Now you'll input the amount of flap lever response on the right
( CH1 ) flaperon by pressing the Cursor Right key once. Now
the little arrow moves under the 1, and you may adjust the
amount of right flaperon travel with the Data +Increase and -
Decrease
keys.
A
DIF
-
A
ileron D
i
f
ferentia
l
Before we explain why we use differential, please note that this
function
drives two aileron servos out of channels 1 and 5. So if
you
have a five-channel receiver, use the ADIF function to
set up your model.
A
ilerons are used to roll or bank the aircraft's wing, but making a
roll
or turn has a price. A wing that generates lift also generates
a drag component called induced drag, meaning that drag is
induced as a byproduct of the lifting wing. This means that the
wing that is lifting more is also dragging more, and the resulting
drag difference causes the fuselage of the model to yaw away
from the desired turn direction, exactly the wrong thing to have
happen. This causes even more drag, which can really hurt an
aircraft's performance. There are two ways to reduce the yaw of
the
fuselage, differential ( ADIF ) and rudder coupling ( A->R ).
Both should be used together.
A
ileron differential causes the ailerons to automatically move
wi
t
h more UP than DOWN motion, which helps to reduce
induced
drag. It helps, along with rudder-coupling, to make the
fuselage
point straight into the oncoming air stream (this is also
called
"coordinating the turn").
The amount of differential is highly dependent on the model
configuration.
A good starting point is for the down aileron to
move
50% to 75% as much as the up-moving aileron.
8. You may wish to set aileron differential. Aileron differential
means
that each aileron has more travel in the 'up' direction
than
the 'down' direction. Normally the down travel is
reduced
to about half of the up travel, especially on slower-
flying
models. Press the Cursor Right key two times, so the
little
arrows move over and under the 1 indicating aileron
stick
is again the master channel. The arrow under the 1
indicates the right ( CH1 ) flaperon. Move the stick to the LEFT
Coordinated turn
fuse lines up with turn direction
(
don't chan
g
e an
y
thin
g
!
)
Nose Points outside Circle
increase coupling and/or
differential
and press the Data -Decrease key until you get to 50-75%.
If
you need even more differential, you can choose as low
Airplane Model Function Descriptions - Page 31
Nose Points inside circle
Too much coupling or differential.
Reduce one or both.