User's Manual

Table of Contents - Page 20 Table of Contents - Page 21
ELVN (Elevon mix)
Setting up a V-Tail
1) Activate the program by pushing down both DATA buttons
simultaneously-the screen will change from "Inh" to a % value.
2) With your model turned on, check your servo travel
directions-both rudder and elevator channels-to be sure they
are correct. Go to the S REV screen if necessary to make the
correction.
3) For a basic V-tail setup, you can leave all the values at 100%
so that the tails will move together as an elevator, but not
independently as rudders.
4) If you wish to add rudder control to help coordinate the turns,
proceed this way: CURSOR over until MAS 4 is blinking than
change the value as necessary (you may have to go into
negative values) to make the master servo on channel
4 move appropriately (see the illustration AT DIRECTION).
Now CURSOR over to SLV 4 and change the value of the
slave servo on channel 2 as necessary.
Setting up a rudder-to-aileron mix
1) In the A-R screen, activate the function by pressing both
DATA buttons at once. The "Inh" symbol disappears and is
replaced with a percentage value (100% is the default).
2) Hold the right-hand joystick to the left, and use the - DATA
button to reduce the value to a reasonable mix to begin with,
say 25%.
3) You're not done yet, though-we have the same issue with
the stick we encountered in the end point adjustment (EPA)
screen.
If you move the aileron joystick to the right, the value goes
back to the default 100% setting. Hold the stick to the right
and reduce the value to 25% here as well.
4) Now watch the rudder move as you move the joystick right
and left-as the right wing's aileron moves up, the rudder
should swing about one-quarter of its travel to the right-and
to the left with left-hand stick travel.
The optimum value of the mix can only be determined by flying
the model: If the nose of the airplane yaws to the right when
you bank left, there is too little coupling-increase the rudder
travel value. If it veers to the left (with the bank) there is too
much
This program allows you to set a certain amount of
elevator-to-flap mixing so that the flaps (or flaperons if you've
activated this mix) move downward slightly when you pull back
on the elevator stick. This is a favorite mix for pylon racing and
3-D aerobatics as a downward flap movement combined with
up-elevator movement enables the plane to snap-turn more
quickly.
E-F (Elevator-Flap mix)
A-R (Aileron-Rudder mix)
This pre-programmed aileron-rudder mix allows you to slave a
certain amount of rudder movement with the movement of the
ailerons to gain automatically coordinated turns. In addition to
aileron differential, this mix reduces the yawing of the fuselage
when the ailerons bank the wing.
This mix is especially useful for making the turns of slower-flying
scale models appear more realistic.
UP elevator
DOWN flap or flaperon
P MIX (Programmable Mix)
Setting up flaperons
1) Activate the program by pushing both DATA buttons-the
"Inh" symbol changes to the default 100% value. With your
model turned on, test the ailerons by moving the joystick to
the right and to the left: To the right, the right-hand aileron
should go up while the left-hand aileron goes down.
If this isn't happening, go to the S REV screen and reverse
the offending aileron.
2) Now check the travel volume: If the servos are stalling at
their maximum throw, turn down the value in the EPA screen
(or move the pushrod further up on the aileron horn to
physically reduce the throw).
Create aileron differential
Now let's create some aileron differential so that the ailerons
move about twice as much upward than downward.
Notice that the "MAS" (master) symbol is blinking along with
channel 1 and the % sign. This means that we can change the
travel value of the right-hand aileron (the master servo).
Also notice that L/U is showing, meaning the value will change
only for left-stick throw.
1) Reduce the downward movement to 50% by pushing down
the left-hand DATA button. Now move the stick to the right
and you will see R/D appear along with the default 100%
throw value.
2) To create similar differential on the left hand servo
(the slave) push down the right-hand CURSOR button
once-now the "1" and the "SLV" symbols will be blinking.
This time leave the L/U stick position at 100%, then move
the stick to the right to light up R/D and decrease the
downward travel value to 50% with the left-hand -DATA
button.
Now we have differential-each aileron should be moving
downward about half the amount it moves upward.
You will likely have to adjust these values once you fly the
plane and observe the yaw of the fuselage as you roll the
aircraft:
This is another built-in mixing program available in the Optic
Sport that mixes the rudder and elevator servos for controlling
V-tailed aircraft. Similar to elevon programming, the two
surfaces can move up and down together (for elevator control)
or opposite (for rudder control in this case).
Note: When you select V.TAL, the ELVN program is rendered
unavailable.
V TAL (V-Tail)
[Insert V-Tail illustration]
Nose Points outside Circle
increase coupling and/or
differential
Coordinated turn
fuse lines up with turn direction
(don't change anything!)
Nose Points inside circle
Too much coupling or differential.
Reduce one or both.
CH2 CH4
CH2 CH4
Up Elevator Right Rudder (view from rear)