THUNDER TIGER Titan Raptor 50 Size 3D Heli Assembly & Maintenance Manual page 32

Radio and Control Linkage Setup For Raptor 50
4.Tail Rotor Control and Gyro Setup
The radio setup for using a heading hold gyro and a non-heading hold gyro will be different. But the
mechanical setup will be the same.
Heading Hold Gyro Setup: Set the tail rotor mixing or revolution mixing values to zero for every throttle
mode in the transmitter. Leave the tail rotor control stick in the center and move the tail rotor trim on
the transmitter to the center. Attach the servo arm so the arm is straight up. Mount the steel ball 10
to 12 mm from the center of the servo arm. Attach the tail rotor pushrod rod. The pushrod will require
a small 15 degree bent to give a smooth run. See the 3-D setup drawing. Adjust the pushrod rod
ball links so the tail rotor blade angle is approximately 15 degree. Check the tail rotor control direction
so a right tail rotor command should increase the tail rotor blade pitch angle. A left command reduces
the angle. Leave the tail rotor control channel ATV at 100%. Use the hand and rotate the gyro to the
left should cause the servo to provide a right tail rotor command (increases the tail rotor blade pitch
angle). Rotate the gyro to the right should cause the servo to provide a left tail rotor command (reduces
the tail rotor blade pitch angle). If the gyro is providing the wrong feedback, then the gyro needs to
be mounted upside down or some gyro has a reverse switch on the gyro box. Never use any tail rotor
revolution mixing when using a heading hold gyro, that causes the gyro to drift. Never use any tail
rotor trim when using a heading hold gyro, that causes the gyro to drift.
Non-Heading Hold Gyro Setup: Leave the throttle stick and tail rotor control stick in the center and
move the tail rotor trim on the transmitter to the center. Attach the servo arm so the arm is straight
up. Mount the steel ball 10 to 12 mm from the center of the servo arm. Attach the tail rotor pushrod
rod. The pushrod will require a small 15 degree bent to give a smooth run. See the 3-D setup drawing.
Adjust the pushrod rod ball links so the tail rotor blade angle is approximately 15 degree. Check the
tail rotor control direction so a right tail rotor command should increase the tail rotor blade pitch angle.
A left command reduces the angle. Leave the tail rotor control channel ATV at 100%. Use the hand
and rotate the gyro to the left should cause the servo to provide a right tail rotor command (increases
the tail rotor blade pitch angle). Rotate the gyro to the right should cause the servo to provide a left
tail rotor command (reduces the tail rotor blade pitch angle). If the gyro is providing the wrong feedback,
then the gyro needs to be mounted upside down or some gyro has a reverse switch on the gyro box.
Go to the tail rotor revolution mix function in the transmitter. Put in a numerical value of +25 for the
high end revolution mixing and -30 for the low end revolution mixing. Move the throttle stick to the
high position and you should see the tail rotor servo moves and "increases" the tail rotor blade angle
from 15 degrees to about 25 degrees. Move the throttle stick to the low position and you should see
the tail rotor servo moves and "decreases" the tail rotor blade angle from 15 degrees to 0 degrees.
This is to compensate for the change in torque on the helicopter fuselage when collective pitch is
changed. A heading hold gyro does not need tail rotor revolution mixing because it automatically senses
heading change and feed in command to lock on the helicopter "heading." A non-heading hold gyro
can only stabilizes the "rate" that the helicopters nose is rotating.
For 3-D flying with a non-heading hold gyro, it will be necessary to put in a V-shaped tail rotor mixing
curve. Try +15 for the high end revolution mixing and +15 for the low end revolution mixing.
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