o
Set Aileron D/R Switch to 1.
o
Turn on the transmitter.
o
Make sure all of your trims are at 0.
o
Set your collective (left stick) to center. It should be in the same position as the right stick.
o
Disconnect your motor from the Electronic Speed Control (ESC) and plug a fully charged
battery pack into the ESC. Leave the helicopter stationary until the Gyro initiates.
o
Begin putting the servo arms on each of the servos, lining the arm up as close to center as
possible.
See Figure A, B and C above for arm orientation
. It is not necessary to hook up
the linkage at this time. Do not worry if they do not line up exactly. We will make
adjustments later by using subtrim. If you find a control horn is very far off from center try a
different control horn.
o
Now we can check servo direction.
§
Move your right stick (cyclic) to the right. Channel 2 servo arm should move down
and Channel 6 servo arm should move up.
§
If this is not the case you will need to reverse one or both of the servos
depending on what reaction occurred.
§
Move the right stick (cyclic) forward. The Channel 3 servo arm should move up
while the Channel 6 and 2 servo arms move down. The opposite applies when the
right stick is pulled back.
§
If this is not the case you will need reverse the Channel 3 servo.
§
Move the left stick (rudder) to the left. The Ch. 4 servo arm should move towards the
tail of the heli.
§
If this is not the case then you will need to reverse this servo.
§
Move the left stick (throttle) up and down. Ch 2, 3 and 6 should move together in
direction relation to the stick movement.
o
If any servo reversing was necessary, you may have to check for servo arm alignment
again to make sure they are as close to center as possible.
o
We will now adjust the subtrim to center any servo arms that need centering.
§
Turn the transmitter on if it is not already on.
§
Make sure both sticks are in the center position.
§
Push scroll and Increase at the same time to enter Function Mode.
§
Press scroll until you reach the SB-TRIM Menu.
§
Use the channel key to select each channel that needs adjusting.
§
Use the increase and decrease buttons to center the servo arms.
§
If subtim value required to center the servo is more than +/- 20 to 30 you
should locate a servo arm that will line up closer to center than the current
arm being used.
§
To save the information press scroll and increase at the same time or turn off the
transmitter
o
After adjusting the subtrims and with both sticks at center, you can now hook up your
linkage rods. Linkage rods set to the length specified in the manual will be very close.
Choose the same hole in each servo arm that will result in the arm and control rod being
perpendicular as shown on Figure A, B and C above, represented by the red lines.
#3 Linkage adjustment , control alignment and pitch
•
Now its time to adjust the linkage on the head assembly. In order to correctly set up your new Trex
you will need a pitch guage. This tool is used to measure the pitch angle of the main rotor blades in
relation to the flybar. The Align Pitch Guage (figure D) works very well and is specifically for smaller
electric helis. If you do not have a pitch guage you should not continue until you do or have some
other manner of determining the pitch.
Figure D
o
Turn on the transmitter.