Wing Panel Assembly - advanced scale models Sukhoi SU-26M Assembly Instructions Manual

When gluing anything that has a smooth surface, it's important to lightly roughen the gluing surfaces with 220 grit sandpaper. This will
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allow the glue to stick better. Also, never glue directly to the covering material. Always remove the covering material from the gluing
surfaces prior to gluing the parts together.
When you plug servo extensions onto the servo leads, apply heat-shrink tubing or electrical tape over the plugs to prevent any chance
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of them pulling apart during assembly, or worse, during flight.
Apply threadlocking compound to any screws that thread into metal. This will ensure the screws don't vibrate loose during flight.
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Apply machine oil (3-In-One Oil) or petroleum jelly to the pivot point of the hinges to prevent epoxy from gluing the hinges solid.
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If any dried epoxy remains on the hinge pivot points after hinging the control surfaces, it can generally be removed by using the tip
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of your modeling knife to chip the dried epoxy off.
Before flying the aircraft for the first time, make sure to go through and double-check everything. Check that all the hinges are glued
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solidly, all bolts and screws are tight, the aircraft is balance, control throws are set correctly, etc.
It is imperative that the aileron hinge gaps be sealed. Failure to do this can lead to control surface flutter, which can cause your
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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.
Apply thin C/A into any pilot holes that you drill into wood. The thin C/A will soak into the surrounding wood, making the pilot hole and
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the area around it stronger.
Use a heat-sealing iron to adhere the covering material down where you cut it. This will prevent it from loosening up and wrinkling.
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It's important that both elevator halves track evenly together throughout the entire deflection range. If one elevator half moves more
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than the other, this will cause the aircraft to roll when it pitches up or down during flight.
It is very important that you understand throttle management. Basically, this means no full throttle dives. Full throttle dives should be
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avoided so as not to cause control surface flutter and/or airframe failure. When the nose of the aircraft drops, decrease the throttle,
just as in full-scale aerobatics.
STEp 1: hinGinG ThE AiLERonS
IMPORTANT The hinges are NOT glued into place from the factory, they are simply slid into place dry for shipping purposes. You
must glue them into place.
Nylon hinge points are used to hinge the control surfaces. These hinges should be glued in with epoxy.
For flutter-free control surfaces and crisp control response, it is imperative that the hinges be glued in properly. This is achieved by
having a tight hinge gap (less than 1mm [~1/32"] wide) and using plenty of epoxy. Poor hinge installation can lead to control surface
flutter which can result in a catastrophic failure of the airframe.

WinG pAnEL ASSEmBLY

q Remove the aileron and hinges from one wing panel.
q Apply a thin coat of machine oil or petroleum jelly to the pivot point of each of
the four hinges. Be careful not to get any on the gluing surfaces of the hinges.
IMPORTANT The machine oil or petroleum jelly will prevent epoxy from
gluing the hinges solid when they're installed.
q Apply a thin layer of 5 minute epoxy to one half of each hinge, then glue
the hinges into the aileron, making sure to wipe off any excess epoxy before
it sets up.
IMPORTANT Install the hinges so that the centre of each hinge (the pivot
point) is even with the point of the bevel in the leading edge of the aileron.
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