Top Flite TOPA0951 - Manual (Page 15)

15
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3. Enlarge the outer hole in one of the plastic
steering arms with a 3/32" [2.4mm] drill. Mount a
2-56 threaded ball link ball to the
outer hole in that
arm with a 2-56 lock nut.
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4. Assemble the tail gear assembly with the parts
illustrated in the photo. Use a drop of threadlocker
on the 3mm set screw in the collar and on the 3mm
socket-head cap screw (SHCS) in the steering arm.
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5. Position the tail gear assembly, then mark the
mounting holes in the tail gear mount onto the plywood
mounting plate. Remove the assembly and drill 1/16"
[1.6mm] holes through the plate at the marks.
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6. Mount the tail gear assembly with three #2 ×
3/8" [9.5mm] Phillips screws. Temporarily remove the
screws, add a drop or two of thin CA to each hole, allow
to harden, and then remount the assembly.
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7. Cut a 36" [910mm] pushrod to a length of 24"
[610mm]. Securely thread a nylon ball link about 12
full turns onto the pushrod and snap the ball link onto
the ball link ball on the rudder arm.
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8. Guide the pushrod through the screw-lock on
the tail gear arm and down through the rudder guide
tube in the fuselage. Mount the rudder steering arm to
the rudder torque rod, tightening it down with a 3mm
SHCS. Holding the rudder and tailwheel wire centered,
tighten the pushrod to the screw-lock connector on the
tail gear arm with a 4-40 × 1/8" [3.2mm] SHCS. Move
the pushrod back and forth to make sure everything
operates smoothly. Make any adjustments necessary.
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9. Temporarily fi t your rudder servo into the servo
tray with a servo arm, but don’t mount it with screws
yet. With the rudder servo arm centered, center the
rudder and mark the pushrod where it crosses the
holes in the servo arm.
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10. Disconnect the rudder steering arm from the
rudder torque rod. Make a sharp, 90-degree bend in
the rudder pushrod at the mark made in the previous
step. Fit a FasLink over the pushrod, and then cut the
pushrod 1/16" [1.6mm] from the connector.
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11. Remove the rudder from the vertical stabilizer.
Apply 30-minute epoxy in the torque rod hole in the
rudder and rejoin the rudder to the vertical stabilizer. Be
certain the rudder is positioned vertically so it moves
smoothly. Remove the T-pins from the rudder hinges
and add at least eight drops of thin CA to both sides
of both hinges to permanently hinge the rudder—be
certain to wait between drops for the hinge to absorb
the CA so it does not run into the hinge gap.