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Taboo GT - Building Guide
16. Apply a liberal amount of epoxy mixture to both sides of the joint. Fill the cavities between the spars and at the rear hard point. Optional: use foam plugs to close the wire channels. Alternatively you can later carve the epoxy from inside of the channels when making an exit hole for the wires. Avoid having too much epoxy around the channel openings in the latter case.
17. Fold the panels back to close the joint. Quickly remove the epoxy that oozed out of the joint. It is much easier to clean it before it hardens, although it is possible to do it after it is completely cured.
18. Place the wing tips on two tables or chairs. The weight of the wing itself is sufficient to apply enough pressure at the joint. Let the epoxy cure well - 1-2 hours or even overnight.
19. Prepare reinforcement fiberglass strips. The width should be about 25mm. The strip must fit between the ailerons completely. If it does not you will have to trim the extra material after the strip is applied and the glue is set.
20. Rough up the surface around the joint. Sand it with 150 grit sandpaper on both sides of the wing. This will guaranatee a good bond of the fiberglass to the wing skin.
21. Spray the fiberglass strip with 3M77. Carefully place it over the joint. You may have to use pencil marks on the fiberglass strip and the joint line to make sure the the strip is exactly at the center of the wing.
22. Either wrap one continuous piece of fiberglass around the leading edge, or (easier) use two pieces and overlap them at the leading edge (gives extra strength near the leading edge for the attachment pins).
23. Use fresh thin foam safe CA or laminating epoxy to wet out the fiberglass strip.
24. Let the glue cure completely. Make sure there is no voids or bubbles at the joint line. Trim the excess fiberglass at the trailing edge after the glue sets.
25. This is where you will regret forgetting to mark the position of the wire channels. Use X-acto knife or a toothed brass tube to cut an exit hole for the wires.
26. Carve out the foam under the hole (and epoxy from the wire channels if you did not plug them).
27. Prepare the front attachment rods by sharpening one end and rounding the other. Cut the front bulkhead from the suppliled plywood blank. Drill the holes using a 1/8" drill bit. This will make the holes slightly undersized. The notches on the sides are for the pushrods. If you plan to use an antenna on the tailboom, make one notch wider to have some extra space for the second tube that will be used for routing the antenna. If you plan to install your antenna in the wing, make both notches the same size.
28. Install the bulkhead into the fuselage temporarily. Sand down the outside of the bulkhead until it fits. Do not leave it oversized such that you have to spread out the fuselage sides, the top piece may not fit if you do so. Put the wing into the saddle and make sure everything fits.
29. Mark the loction of the holes for the attachment rods on the leading edge. Make sure they are symmetrical relative to the joint line.
30. "Drill" the holes for the carbon rods using X-acto knife. Insert the rods at a small downward angle (the forward ends must be slightly down), twisting the rods when inserting them through the foam.

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