Open up the slot in the flap with a small cutter
and Dremel tool for the control horn. Be very
careful not to cut through the control surface
as you enlarge the slot.
Optional: paint the control horn to match your
color scheme.
Drill the control arm for the ball end bolt. Start
with smaller wire size drills and find the one
that is just large enough for the bolt without
allowing play.
Tape around the slot with low grip masking
tape and fill the slot with Aeropoxy.
Rough up the gluing surface of the control horn
and insert into the slot. Make a nice fillet
around the horn, and then remove tape. Allow
to dry thoroughly.
Repeat for other wing and flap.
Prepare and install linkages.
Run flap servo extensions to receiver location.
Test fit wing to fuselage. Make sure the
inboard root edge of the flap clears the
fuselage in all positions. The part most likely
to rub will be the inboard root edge of the flap
as you move the control surface to its extents.
Tighten wing attach bolts and check for any
play.
FB Su-27
Page 12
