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value for the program mix is 100%, meaning that the slaved channel will mix completely with
the master channel. For our example of mixing the two aileron servos, this would be correct.
To turn on the mixer, use SW-3 in the lower position for Programmable Mix circuit 1 as the
default.
In the event that both aileron servos moved the same direction, (both moved upward at the
same time, for example), it is possible to reverse the Slave channel by using a negative
percentage. In this case, your Optic 6 can be changed to –100% value, which means the
Channel 6 servo will move in opposite direction of travel to channel 1. You have completed a
programmable mix. Programmable Mixing circuit No. 2 works the same way, and it uses SW-
1 in the down position to activate as the default.
(Please see Switch Select to change the switch
used to activate your programmable mixes.)
Exit the Programmable Mixing option by
depressing both of the UP and DOWN Edit keys at one time.
AILERON DIFFERENTIAL
Aileron Differential is the term used to describe the uneven (or different) movement of the
ailerons in relation to the amount of motion moving upwards and moving downwards. On
aircraft with under-cambered wings or high-aspect ratio wings like a glider, the ailerons are
more effective when the amount of movement upwards is significantly more than the
movement downwards. When an aileron control surface moves downward on a wing, the
amount of lift it creates will increase, causing the wing to rise upward in the roll axis.
However, the amount of movement downward can quickly turn from lift to drag, meaning the
aileron no longer lifts the wing upward into the roll, but pulls the wing back instead, similar to
the wing being stopped in flight. Obviously this is not good, and you want to prevent this from
occurring in order to keep the aircraft flying smoothly. However, the amount of movement
upward by an aileron does not cause this drag effect near as quickly. So, it makes sense that to
keep the aircraft smooth in flight during turns, you should limit the amount of down motion by
the aileron, and so you need aileron differential.
On your Optic 6, you can activate the Aileron Differential function by entering into the Menu
Functions program by depressing both the EDIT keys at once.
Note that this function can only
be used when two servos and two separate channels are used to control the Ailerons.
( Please
see the Program Mix section for details on using two servos for Ailerons).
Use the UP and
DOW scroll keys to locate the ADIF function. To activate the ADIF, press the CLEAR key
once. The LCD screen will change from “ADIF Inh” to the new display of “ADIF On”. The
default value in this function is 100%, meaning that both directions of travel by the aileron
servos are at their maximum control throws as set by the EPA. Move the cursor to the
adjustment screen by depressing the right > cursor key once. You should now see the two
channels affected by the aileron differential function, which by default would channels 1 and 5.
The Master indicating cursor should be over channel 1 with the Slave indicating cursor under
Channel 1. This means your adjustment will be made to channel 1 at this time. To the right,
the L/U indicator should be showing, meaning that the direction of movement being changed is
LEFT/UP. By moving the aileron stick to the right, the L/U indicator will change to R/D,