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Carefully slide the wing tip panel and the wing center-section panel
together with the wing joiner temporarily installed (without using glue).
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IMPORTANT
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While sliding the two wing panels together, carefully
guide the aileron servo lead pull-string from the hole in the wing
center-section panel into the matching hole in the wing tip panel.
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IMPORTANT
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When the wing joiner is installed, it should not fit tightly into the wing panels. It should actually be slightly
loose. This will ensure that when you glue the wing joiner into place that epoxy can get into the joints between the wing joiner
and the wing joiner boxes. If the wing joiner fits too tightly, the epoxy will be pushed out of the joints when you slide the wing
joiner into the wing panels, leaving no glue to secure it into place.
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While holding the wing tip panel and the wing center-section panel together firmly, make sure that both wing panels are lined up
at both the leading and the trailing edges, then look carefully at the glue joint: the wing panels should fit together tightly with few or
no gaps in the joint.
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IMPORTANT
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The proper amount of dihedral is built into the root rib of the wing tip panel. It's important that the two wing
panels fit together firmly to ensure that the amount of dihedral is correct.
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If the wing panels do not fit together properly, remove the wing joiner and use 220 grit sandpaper with a sanding block to
lightly sand the edges and tips of the wing joiner, until you are satisfied with the fit. Typically, the fit of these parts is very good,
although, to achieve a perfect fit, you may need to sand the root end of one or both of the wing panels, in addition to lightly sanding
the edges and tips of the wing joiner.
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When satisfied with the fit, remove the wing tip panel from the wing center-section panel.
STEP 2: INSTALLING THE WING TIP PANEL
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Apply a long strip of masking tape to the top and bottom edges of the
root rib on both the wing panels.
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The masking tape will prevent excess epoxy from getting onto the
parts when you join them. This will make cleanup of the glue joint
much easier.
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Mix a generous amount of 30 minute epoxy. Working with the wing tip panel for now, apply a thin layer of epoxy inside the wing
joiner box and to only half of the wing joiner. Make sure to cover the top and bottom, as well as the sides, and use enough epoxy to
fill any gaps.
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WARNING
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Use only 30 or 45 minute epoxy to install the wing joiner and to join the wing panels together.
Do not use 5
minute epoxy. It is not strong enough.
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Slide the wing joiner into the wing tip panel up to its centerline. Quickly remove any excess epoxy, using a paper towel and
rubbing alcohol, and allow the epoxy to set up before proceeding.
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After the epoxy has set up, test-fit the wing tip panel and the wing center-section panel together again to double-check that they
still fit together properly. Check the leading and trailing edges, too. It's important that they be even with each other.
Continued On Next Page
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