11
❏
10. Insert the rudder pushrod, from the front, through
the fi ve pushrod guides. The z-bend should be next to the
rudder servo arm.
❏
11. Remove the servo arm from the rudder servo and
insert the z-bend in the servo arm so that it is on the outside
of the arm, away from the fuselage. Re-install the servo arm
screw in the servo.
❏
12. Slide the black heat shrink tubing over the aft end
of the rudder pushrod. Insert the z-bend wire into the hole
in the rudder control horn from the bottom. Slide the other
end of the z-bend wire into the heat shrink and install the
rudder control horn in the rudder. Note: The rudder hinge
tape may be covering the front of the rudder control horn slot.
Use a sharp hobby knife to trim the tape from the slot.
❏
13. Use foam safe CA to glue the rudder control horn to
the rudder.
❏
14. Adjust the length of the pushrod so that when the
rudder servo is centered the rudder is centered. Secure
the z-bend wire to the rudder pushrod by shrinking the heat
shrink tubing using a soldering iron. Be careful when using
the soldering iron close to the foam. The foam will melt if it is
touched with the hot soldering iron.
❏
15. Re-check that the rudder servo is centered and the
rudder is in the neutral position. Apply a drop of thin CA to
the end of the heat shrink to further secure the z-bend to
the pushrod.
❏
16. Operate the rudder and elevator checking that the
pushrods do not bind in the pushrod guides. Adjust the
position of the pushrod guides so that the pushrods are
straight and the guides are 90° to the fuselage. Glue the
pushrod guides to the fuselage with foam safe CA.
❏
17. Locate the anti-differential arm. Place the anti-
differential arm on the underside of the servo arm. If you
are using Futaba servo arms, the holes in the servo arm
and the holes in the anti-differential arm will align. If you are
using another brand of servo arm, you will need to use a #60
[1mm] drill bit to drill a pilot hole through the servo arm that
will align the servo arm with the anti-differential arm.
❏
18. Attach the anti-differential arm to the servo arm using
two 3/64" [1.2mm] self tapping screws.
