GREAT PLANES matt chapman eagle 580, Instruction Manual

Page: 14 / 24

14
Install the Rudder Servo
Now is the time you need to decide on which rudder control
method you are going to use. Unless you are installing a very
heavy motor, we recommend that you use the pull-pull system
to keep the weight out of the tail. To help you decide you can
install the wing, cowl and canopy. Mark the CG location on
the wing (shown on page 17). Then, place the plane on a CG
stand and position the fl ight battery in the middle of the battery
tray. If the plane is slightly tail heavy, we recommend that the
rudder pull-pull system be installed. If the plane is nose heavy,
the rudder servo can be installed in the tail. There are extra
servo openings located in the tail for this purpose. We will
not go into detail on installing the servo in the tail. Follow the
same procedure used for installing the elevator servo.
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1. Install and then remove a servo mounting screw into
each of the holes in the rudder servo bay. Apply a drop of
thin CA into the holes to harden the threads. Once the glue
has hardened, install the servo into the servo opening using
the hardware included with your servo and two of the black
servo mounting plates. Center the servo. Then install a servo
arm as shown.
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2. Cut the pull-pull string in half. Put a small drop of thin
CA on one end of each piece of string. Allow the CA to cure
and trim off any frayed thread. Insert the end into the pull-
pull guide tubes in the fuselage. The string may be diffi cult to
guide through the exit. Once the string will not go any further
into the tube, the string will not come out of the exit; use the
point of a hobby knife to help pull the string through the exit.
Tape the string to the side of the fuselage to prevent it from
being pulled through while installing the rudder horns.
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3. Measure up 13/16" [21mm] from the bottom of the rudder
and make a mark. Measure in from the leading edge 5/16"
[8mm] and make a mark. Drill a 1/16" [1.6mm] hole through
the rudder, perpendicular to the centerline of the rudder.
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4. Insert the 2-56 threaded rudder control horn rod. Center
the rod in the rudder with two #2 fl at washers and 2-56 nuts
on each side. A drop of threadlocker on the threads will help
prevent the nuts from coming loose.
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5. Thread a nylon torque rod horn onto each end of the
control horn rod. Adjust the torque rod horn so that they are
both equal distance from the rudder.