WATT AGE Super Impress II EP ARF Instructions For Final Assembly - page 21
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❑ Slide the threaded end of the pushrod wire into the preinstalled
nylon pushrod tube in the fuselage, then attach the servo horn to the
servo, making sure that the servo horn is centered and points toward
the side of the fuselage.
STEP 3: INSTALLING THE ELEVATOR CONTROL HORN AND CLEVIS
❑ Position one nylon control horn onto the bottom, left side of the
elevator. When aligned properly, the centerline of the control horn
should be 5/8" out from the side of the fuselage (at the hinge line) and
the clevis attachment holes should be lined up over the hinge line. The
front of the control horn should be angled slightly toward the fuselage
side, too, so that it lines up better with the pushrod wire.
❑ When satisfied with the alignment, mark the locations of the two
mounting holes, then drill 5/64" diameter pilot holes through the
elevator for the control horn mounting screws.
PRO TIP
Continued On Next Page
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Before installing the control horn in the next procedure, drip several drops of thin C/A into the pilot holes and allow
the C/A to fully cure. The C/A will harden the surrounding wood, making the mounting area stronger.
❑ Install the control horn and backplate, using two M2 x 12mm machine screws, being careful not to overtighten them.
❑ Double-check that both the servo horn and the elevator are still centered. If the elevator is not centered, adjust the clevis until
it is. Move the elevator up and down several times to ensure that the linkage assembly does not bind. It should operate smoothly
in both directions.
❑ Carefully thread one nylon clevis onto the pushrod wire and snap
the clevis into the outermost hole in the control horn.
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Hold the pushrod wire with a pair of pliers to prevent it from turning
or twisting when threading on the clevis.
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✦IMPORTANT✦
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✦ You may need to bend the pushrod wire slightly
after it exits the fuselage side, so that it lines up perfectly with the
control horn.
STEP 4: INSTALLING THE RUDDER PUSHROD, CONTROL HORN AND CLEVIS
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The rudder pushrod assembly is installed using the same techniques that you used to install the elevator pushrod assembly.
❑ Cut away and remove all but one arm from a "4-point" servo horn. Enlarge the hole that is 1/4" out from the center of the servo horn,
then install the Z-Bend in the end of the 16-3/8" long threaded pushrod wire into the hole.
❑ Plug the rudder servo (left-side servo) into your receiver, then plug your ESC into the receiver and your flight battery into the
ESC. Turn on your radio system and center the servo, using the rudder trim lever on your transmitter.
❑ Install and tighten the servo horn retaining screw, to hold the servo horn securely to the servo.