Install The Wing Panels - GREAT PLANES Yak 54 36 ARF Instruction Manual

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10. Locate the aileron double rib that has a rectangular
mounting block at the LE. Using the position of the pushrods
as a guide, cut a slot 3/8" [9.5mm] long perpendicular to the
hinge line just behind the bevel of the LE of the aileron for
each control horn in the center of the mounting block. The
slot only needs to be wide enough to accommodate the
thickness of the control horn backplate tab on the control
horn (approximately 1/16" [1.6mm] thick). Do not cut all the
way through the ailerons! 3/16" to 1/4" [5mm to 6mm] deep
is sufficient.
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11. Trim the control horn backplate tabs to length so that
the control horns seat flat in the slots you made. Confirm
that the holes in the control horn are centered over the hinge
line. When satisfied, coat the backplate tabs with medium
CA and press them into the slots.
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12. Use the position of the control horn to adjust the
length of the pushrods as needed. Remove the servo arms
from the aileron servos. Connect the other adjustable
clevises on the aileron pushrods to the control horns and
reattach the servo arms. Fine tune the length of the
pushrods inside the clevises so that the ailerons are in the
neutral position when the servo arms are parallel to the
hinge line. Lock the clevises onto the pushrods by threading
a 2mm x 4mm screw into each clevis screw hole and tighten
carefully. The excess rod ends can be cut away.

INSTALL THE WING PANELS

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1. Use medium or thick CA to glue the anti-rotation
dowels into the wing root ribs. The dowels should protrude
beyond the wing root ribs by 5/16" [8mm]. If the dowels are
slightly loose inside the holes in the wings, try to glue the
dowels as perpendicular to the root ribs as possible.
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2. Before gluing, test fit both wing panels into the fuselage
to confirm a proper fit. The center spar extends into the
fuselage and interlocks with the spar of the other wing panel.
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