User's Manual

Table of Contents - Page 18 Table of Contents - Page 19
ELVN (Elevon mix)
ELVN (Elevon mix)
front view
If you are setting up a tail-less delta or flying wing aircraft, you
can use this program to activate the pre-programmed elevon
mix that mixes the output on the CH 1 aileron and CH 2 elevator
servo channels. (As you will notice in the servo connection
chart, you plug one aileron servo in the receiver's channel 1 slot
and the other aileron servo into channel 2-the slot that usually
feeds the elevator.) This is necessary because on these wing
types the ailerons must double as elevators.
Note: When you activate ELVN, note that flaperon and V-tail
mixing are rendered unavailable by the radio.
2) Now set the amount (and direction if necessary as noted a
bove) of each servo-both as ailerons and as elevators.
Because flying wings are extraordinarily pitch sensitive
(because the elevator control surface is so close to the
airframe's center of gravity), you generally need the elevator
travel to be much less than that of the ailerons.
We create this type of differential in the next step.
3) For now, leave the "MAS 1" percentage value at the default
100% (unless your servo is stalling) and then CURSOR over
to the "SLV 1" where you will also leave the default value at
100%. Push the CURSOR button again to light up "MAS 2"
and reduce the value to +40%; CURSOR over to "SLV 2"
and reduce that value to +40% as well.
If one of the servo's travel directions isn't correct in the
elevator function, simply make this servo's travel volume a
negative -40%.
4) When you fly the model, if you find that this 40% reduction
isn't enough to take out "pitchiness", land and further reduce
the travel volume. To tone down the roll response, you can
reduce the endpoints of the aileron travel or set up dual-rates
on channel one as described in the setup of Model-1 above.
[Insert graphic of aileron differential and flaperons function]
This function activates another aileron servo (on channel 6
when in the ACRO menu) so that both ailerons can be slaved
together to create a flaperon. This allows both ailerons to move
together as flaperons for camber control or independently as
usual for roll control. In this menu you can also set individual
travel values-upward and downward-for each aileron to create
aileron differential. Being able to move an aileron less in one
direction (usually downwards) helps reduce yaw in turns
(and therefore unnecessary drag.)
FLPN (Flaperon)
Setting up elevons
1) Activate the elevon function by pressing both DATA buttons
when you are in the ELVN screen. Now check your model to
see what happens when you move the right-hand joystick
side-to-side-the ailerons should go up and down appropriately.
Move the joystick forward and back to see if the ailerons both
respond correctly as elevators. If necessary, go to the S REV
screen to reverse an offending servo.
IMPORTANT NOTE: It is possible due to the particular
configuration of your servos that servo reverse won't fix the
problem-you may get the ailerons working properly but not the
elevator response on both servos.
Don't worry: You can fix this problem in the elevon programming
by changing one of the servo travel volumes to a negative value.
CH1 CH2
Aileron Operation
Elevator Operation
P MIX (Programmable Mix)
In this screen you can activate the ability of the Optic 6 Sport to
create a custom-made, programmable mix of any two servo
channels in which one servo is electronically "slaved" to another.
This is a relatively advanced function.
The program also provides a way to change the value of the
response of the slave servo to that of the master.
For example you could slave the elevator servo to the throttle
channel so that when you increase the throttle, a slight
downward movement of the elevator kicks in to automatically
compensate for any up-pitching due to the increased thrust.
Another typical mix might be to mix rudder with the throttle to
reduce yawing. The Optic Sport's mixing program also offers an
advanced function (call TRM P MIX) that, when activated,
allows both servos to be trimmed by the same master servo
trim button on the radio case-a useful option when, for example,
you are using two servos to control a split elevator.
We will show you how to set up these examples below.
Set up a throttle-to-rudder mix
When you apply throttle to a powerful motor, the resultant
torque from the spinning propeller often tends to make the
plane yaw to one side (usually to the left).
This not only interferes with precision aerobatic maneuvers,
but it makes it difficult to keep the model aligned with the
runway during a full-power takeoff. To reduce the "pilot load"
of having to correct the yaw with your left thumb on the rudder
stick, you can use the P-Mix program function to automatically
mix a proportional amount of rudder with an increase of throttle.
Now let's set it up:
shows "CH" with "MAS" blinking beneath. If, instead,
a percentage value is blinking use the right-hand CURSOR
button to scroll over until you get this "CH" and "MAS"
configuration. One of the servo channel numbers will also be
showing-the default is "1".
2) To make the throttle the master channel, push a DATA
button to light up "3". Now push the right-hand CURSOR once
more: "SLV" will light up with a number. Use a DATA button to
change this number to "4". Now the rudder channel is slaved
to the throttle channel.
3) Push the CURSOR button again: MAS 3 and a percentage
value will be blinking. Use the DATA buttons to set the value
of rudder travel to throttle travel-change to a negative value to
move the rudder in the opposite direction if necessary.
You won't likely need more than 15% to counteract the torque,
but only flight-testing will tell for sure.
1) Enter the Main Function menu and scroll down to the P MIX
screen with the EDIT buttons. Activate the function by pressing
both DATA buttons-"Inh" will turn off and the default screen
P-Mix trim:
Set up a double-servo elevator with coordinated trim function
The Optic 6 Sport offers an unusually sophisticated nuance
with its P-MIX function: the ability to trim two servos
simultaneously. This is especially useful if you are using two
elevator servos (one to each half of the elevator). In flight,
if the elevator needs to be trimmed, you can make the
adjustment with the trim button next to the right-hand joystick
on the case instead of having to enter the model setup
programming in order to trim the servos independently.
Lets set this example up:
1) Enter the P MIX screen and select the master and slave
servos (2 and 5 on this radio for split elevators) and then select
the travel value (most likely 100% unless your servo pushrods
are not set up exactly the same way).
2) Now use the Right CURSOR button to move to the P MIX
screen where "TRM" is blinking. The default setting is
"OFF"-turn it to "ON" by pressing the CLEAR button.
3) Exit the menu and you now have a split elevator with trim
function.