Great Planes Giant Big Stik ARF - GPMA1224 - Manual (Page 10)

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1. Make four pushrod assemblies from the hardware
shown in the photo. Turn the pushrods into the clevis
approximately twenty full turns.
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2. Connect a solder-on clevis into the outer hole of one
of the aileron servo arms. (Do not cut off the unused servo
arms until instructed to do so when setting up the radio
later.) Hold one of the control horn/pushrod assemblies to
the wing with the horn resting on the aileron (as shown in
the sketch) and the pushrod up to the clevis.
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3. Use a fine-point felt-tip pen to mark the pushrod where
it should be cut for soldering onto the clevis.
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4. Cut the pushrod at the mark. Take the clevis off the
horn, then refer to the “Expert Tip” that follows about
soldering and solder the clevis onto the end of the pushrod.
This is what a properly soldered clevis looks like–shiny
solder with good flow, no blobs, flux removed.
1. Use denatured alcohol or other solvent to thoroughly
clean the pushrod. Roughen the end of the pushrod with
coarse sandpaper where it is to be soldered.
2. Apply a few drops of soldering flux to the end of the
pushrod, then use a soldering iron or a torch to heat it.
“Tin” the heated area with silver solder (GPMR8070) by
applying the solder to the end. The heat of the pushrod
should melt the solder–not the flame of the torch or
soldering iron–thus allowing the solder to flow. The end of
the wire should be coated with solder all the way around.
3. Place the clevis on the end of the pushrod. Add another
drop of flux, then heat and add solder. The same as
before, the heat of the parts being soldered should melt
the solder, thus allowing it to flow. Allow the joint to
naturally cool without disturbing. Avoid excess blobs, but
make certain the joint is thoroughly soldered. The solder
should be shiny, not rough. If necessary, reheat the joint
and allow to cool.
4. Immediately after the solder has solidified, but while it
is still hot, use a cloth to quickly wipe off the flux before it
hardens. Important: After the joint cools, coat with oil to
prevent rust. Note: Do not use the acid flux that comes
with silver solder for electrical soldering.
HOW TO SOLDER
If you’re not building your Giant Big Stik ARF with
flaps hook up the servos this way.
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