HITEC OPTIC 6 - Servo EPA (End Point Adjustment); Dual Rates and Exponential Functions

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Sim
p
le Transmitter Setu
p
- Electric
A
ir
p
lane,
5
-Channel Receiver
(
ACGL Menu
)
16. If the throttle stick operates the speed control the wrong
direction,
move over to Channel 3 by pressing the C ursor
Right key. Now the 3 should be flashing in the display.
Activate
the opposite direction for the throttle servo by
pressing
the Active/Inhibit (Clear) key. Verify the throttle
stick
makes the motor turn on and off in the correct direction.
17. If you are using Switch SW-1 for throttle on-off, check that
won't run out of subtrim authority. Remove all the arms
that
are in the way or interfere with your pushrods.
Servo
Pushrod
the switch operates the motor in the direction you would like.
The
UP position should be used for motor ON, and DOWN
for
motor OFF. If it does not, reverse CH3 using the REV
menu
as described above.
18. Now we'll set the direction of the rudder servo, if used.
When
you move the left-hand stick towards the CENTER
of
the transmitter (to the right), the trailing edge, or rear of
the
rudder should move to the right. Check to make sure!
RIGHT
LEFT RIGHT
LEFT
Front View
If the rudder moves the wrong direction, move over to
Channel
4 by pressing the Cursor Right key. Now the '4'
should
be flashing in the display. Activate the opposite
direction
for the rudder servo by pressing the Active/
Inhibit (Clear) key. Move the left-hand stick left-and-right
again
and verify the rudder moves the correct direction.
19. Now set the CH5 aileron servo direction (otherwise skip
this
and the next step). This is channel 5 , and the ' 5 '
should
be flashing for this command. When you move the
right-hand
stick to the right, the aileron on the left wing
should
move downwards. Check that the CH5 aileron
moves
the correct way! If it does not, activate the opposite
direction
using the above procedures. Move the right-hand
stick
again and verify the CH5 aileron moves the proper
directions.
20. Before we set the servo neutrals, we need to be sure that
all the trims are centered. Press both Edit keys to get to the
main
menu, where voltage and time are displayed. Press
the
Up arrow until the word TRIM appears. By moving each
of
the four trim levers around, you can see their positions,
and
move them back to zero for the next step.
21. Once you have centered all the trims, unscrew the screws
holding
the servo arms onto the elevator, ailerons, and
rudder
(we'll set the throttle travel later). You will want to
place
the servo arms on the output shaft so they are near
neutral
- that is, about 90 ° to the servo case sides or, if
the servo is mounted sideways, 90 ° to the pushrod
(sideways mounting is not recommended). This way you
90
Adjust the clevises on each servo pushrod to get the
position
of each control to be as close as you can to neutral
(lined up with the adjacent portion of wing or tail).
Setting Subtrims. Now we'll adjust all the subtrims to
electronically
set the desired neutral locations. To do so,
go
back to the programming menu by pressing both Edit
keys, then press the Up or Down arrow key repeatedly until
STRM appears.
22. Set the subtrims for CH1 and CH5 ailerons, elevator, and
rudder
following the instructions given in steps 25 - 32 in
the
aerobatic setup instructions. Remember your second
aileron
servo is plugged into CH5.
23. Servo EPA (End Point Adjustment). Set up the servo
travels
for each channel following the instructions given in
steps
33 - 43 in the aerobatic setup instructions.
24. Dual Rates and Exponential Functions. You can use the
exponential
function to make the aileron and elevator
responses
less sensitive around neutral, so that your racer
reacts
smoothly for mild control inputs, but reacts strongly
when
you command a lot of stick. You can adjust the
amount
in flight by flipping switches. Exponential functions
make
the response slower around center and larger away
from
center. You may also use dual rate to adjust the total
travels,
but keep them linear.
Set up dual rates following the procedures given in steps
48 - 53 of the aerobatic aircraft setup instructions. NOTE:
if you set any of the dual rates to 0%, you will have ZERO
CONTROL and LOSE CONTROL OF YOUR AIRCRAFT when the
switch is in that position. DON'T DO IT!
25. Airbrake setup using CAMB . You can get airbrakes by
flipping
a switch to raise both flaperons and add elevator to
maintain
trim. This configuration increases the drag, making
the
landing approach steeper to help make safe landings in
small
fields.
With CAMB on, it is possible to lose some aileron
effectiveness.
Be sure to test the landing settings at altitude
before
trying it on a landing approach. You should spend
some
time fine-adjusting the elevator travel so that there is
no
trim change when CAMB is on.
Sim
p
le Transmitter Setu
p
-
Electric
A
ir
p
lane,
5
-
Channel Receive
r
(
ACGL Menu
)
-
Pa
g
e 24