GREAT PLANES BLT, Instruction Manual

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14. From the remaining 1/16” balsa STTRF02 laser-cut
sheet, cut two wing tip braces 5/16” x 6-1/8” (7.9mm x
155.5mm). Glue the wing tip brace on the inside of the W-1
wing tip rib. The wing tip brace should be centered on the
aft edge of the leading edge dowel, between the wing spars
and the trailing edge sheeting.
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15. Remove the wing from your building board and
carefully sand off any excess glue. From the remaining 1/32" x
3" x 15" (.8mm x 76.2mm x 381mm) balsa sheet, cut pieces to
make bottom center sheeting to fit between the leading edge
dowel and wing spar and from the wing spar to the trailing edge
sheet. Glue the sheets in place and sand carefully.
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16. Cut and sand the wing spars and trailing edge
sheeting flush with the wing tip rib.
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17. Now go back to step 2 and build the right wing panel.
Remember! Build it over the right wing plan.
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1. Draw a vertical centerline on the laser-cut 1/16" ply
dihedral brace .
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2. Using a hobby knife, carefully cut a 1/16" slot in rib
W1A, just behind the main spar on both wing panels. Trial
fit the dihedral brace in the slots.
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3. Trial fit the wing halves together. With one wing half flat
on your building board, block-up the wing tip of the other
wing half so that it is 4-1/2" (114.3mm) off of your building
board. Use a sanding bar to sand the center joint as
necessary until the wing halves fit together without any gap.
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4. When satisfied with the fit, apply medium CA to both
sides of half of the dihedral brace. Insert the dihedral brace
into one of the wing halves so that the brace is attached to
the two main spars. After the CA has cured, apply medium
CA to both sides of the other half of the dihedral brace and
the root rib. With one wing half flat on your building board
and the wing tip of the other wing half blocked up as before,
quickly slide the two wing halves together. Before the CA
cures, make sure the trailing edges are aligned.
NOTE : You may prefer to use 6-minute epoxy instead of
CA. This will allow more working time.
Join the Wing Panels
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