Hangar 9 Advance 40 Instruction Manual page 19

Stage 4—Installing the Tail
Note: The rudder and elevator will be in-line with the tail
surfaces when the length of the pushrod is adjusted
correctly and servos centered.
Step 5. Now we'll adjust the pushrod. Center the elevator and
rudder servo as we did in Stage 3 (repeat Step 1, Servo
Centering, page 14, just in case the servos got "bumped" during
any prior installations). Now shorten or lengthen the pushrod by
screwing the clevis until the rudder is even with the horizontal
stabilizer area ahead of it. Use the same procedure to adjust the
two elevator pushrods, making sure both elevator surfaces are
even with the horizontal stabilizer area ahead of them when the
clevis are attached. Each clevis will go into the second to the
outermost holes on the control horn for the rudder and the two
elevators. Make sure the rudder and elevator are parallel (in-line)
with the surface in front of them.
Rudder Pushrod Exiting the Fuselage
The rudder pushrod has a bend in it where it exits the fuselage.
Make sure the pushrod is oriented such that when the pushrod
exits the fuselage, it runs parallel with the fuselage. If you don't
do this, the pushrod will bend when exiting the fuselage.
Deflection of Rudder
After you've attached the rudder pushrod clevis to the servo and
control horn and you've centered your rudder servo, check the
"right" throw of the rudder. If it seems that the rudder is not
moving to the right, you will need to mechanically adjust the
wooden pushrod dowel (with the metal rods attached) inside the
fuselage so it doesn't hit the last interior former.
Adjusting the Clevis
Adjust the clevis so that it moves the wooden pushrod dowel
further to the front of the fuselage.
1) Screw "out" the clevis that connects to the rudder control horn
so you have approximately 3/4 of the rod's threads inside the
clevis.
2) Center your rudder servo like you did in Step One of Stage 3.
3) Screw "in" the clevis that attaches to the servo horn until the
rudder is "centered."
This should now allow for sufficient "right" throw of your rudder.
Servo End
Thread clevis "in" onto wire.
Rudder End
Thread clevis "out" onto wire.
CONTINUED
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