Heli-Max HMXM1015 - Manual (Page 3)

3
Installing the HM4050 in Your Helicopter
Rudder Servo Preparation
WARNING: In this step it is best to unplug the motor or move the motor pinion gear away from
the main gear or you might risk injury.
We are going to concentrate on a 400/450 size helicopter but the
same basic principles apply for other sizes.
1
Install the ball connector on the servo arm. We
have found a ball link spacing of 8mm to 10mm
from center of the servo output shaft to the center
of the pushrod ball link to be a good overall length
for most 400-450 size helicopters.
2
With the servo installed in the mount, plug the
rudder servo into channel 4 of your receiver.
Turn the radio system on and plug the main
power battery into the motor controller.
3
Adjust the trim switch (located under the rudder
stick) to the centered or zeroed position. Also, if
you have a computer radio, enter the radio’s sub
trim menu and make sure channel 4 is zeroed.