Step 3: Installing The Aileron Servos - advanced scale models Sukhoi SU-26M Assembly Instructions Manual

q Repeat the previous procedures to hinge the aileron to the second wing panel. After the epoxy fully cures, pivot both ailerons up and
down several times to free up the hinges and ensure smooth movement throughout the deflection range.
STEp 2: SEALinG ThE AiLERon hinGE GApS
IMPORTANT It is imperative that the aileron hinge gaps be sealed. Failure to do this can lead to control surface flutter, which can
cause your aircraft to crash. Sealing the hinge gaps will also provide crisper control response and allow the aircraft to track straighter
and fly truer, making trimming much easier and more precise.

STEp 3: inSTALLinG ThE AiLERon SERVoS

q After the epoxy sets up, apply a thin layer of 5 minute epoxy to the exposed
half of each hinge, then hinge the aileron to the wing panel, making sure to
wipe away any excess epoxy before it cures.
IMPORTANT Push the aileron firmly into place to ensure that the hinge
gap is as tight as possible. The hinge gap should be less than 1mm (~1/32").
q Two different lengths of covering material are provided to seal the hinge
gaps. The two longer lengths are used to seal the aileron hinge gaps and the
two shorter lengths are used to seal the elevator hinge gaps.
q Fold one length of longer covering material in half lengthwise so that there
is a sharp crease down the middle of the covering material.
IMPORTANT Only the bottom of the hinge gap needs to be sealed. It is
not necessary to seal both the bottom and the top.
q Remove the protective backing from the covering material. With the aileron
fully deflected in the "UP" position, place the length of covering material over the
hinge line (on the bottom), making sure that the crease is pushed completely
down into the hinge line.
q With the aileron fully deflected in the "UP" position, use a heat-sealing
iron to adhere the covering material to both the trailing edge of the wing and
to the leading edge bevel of the aileron.
q Trim the excess covering material flush with both surfaces, then pivot the
aileron up and down several times to check for free movement throughout the
deflection range, then repeat the previous procedures to seal the aileron hinge
gap on the second wing panel.
q Plug one 300mm (12") servo extension onto one aileron servo lead.
q To prevent the plugs from pulling apart during assembly, or worse, during
flight, secure the plugs together, using a short piece of 10mm (3/8") diameter
heat-shrink tubing (not included). Use a heat gun to shrink the tubing.
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