WATT AGE P-47 Thunderbolt EP ARF Assembly Instruction Manual - page 19
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❑ Position one nylon control horn onto the bottom of one elevator half,
then mark the locations of the mounting holes. When aligned properly,
the centerline of the control horn should be 7/8" out from the inside
edge of the elevator half (at the hinge line) and the clevis attachment
holes should be lined up over the hinge line. The base of the control
horn should be angled slightly toward the fuselage side, too, so that it
lines up better with the pushrod wire.
❑ Drill 5/64" diameter pilot holes through the elevator half for the control horn mounting screws.
❑ 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 balsa, making the mounting area stronger.
❑ Install the control horn and backplate, using two M2 x 14mm machine screws, being careful not to overtighten them.
❑ Use a piece of masking tape, taped between the elevator half and the stabilizer, to hold the elevator half centered.
❑ 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 installing the clevis.
❑ Repeat the previous procedures to align and install the second nylon
control horn and clevis assembly onto the other elevator half.
STEP 3: INSTALLING THE ADJUSTABLE PUSHROD CONNECTOR ASSEMBLY
❑ Enlarge the hole in a servo arm that is 3/8" out from the center of the
servo arm, using a 5/64" diameter drill bit. Install the adjustable servo
connector into the enlarged hole, using the two flat washers and hex nut
to hold it in place.
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✦IMPORTANT✦
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✦ Don't tighten the hex nut completely. You don't want
the nut loose, but you do want the connector to rotate without binding.
❑ Apply a drop of thin C/A to the hex nut to prevent it from loosening during flight. Do not omit this procedure.
❑ Connect your radio system and plug the elevator servo (right-side servo) into the receiver. Center the servo by double-checking
that the elevator trim lever on your transmitter is centered.
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