10
JOIN THE WING PANELS
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1.
Test fit
the die-cut 1/8" ply leading and trailing edge
joiners and the four 1/16" x 1/4" x 6-1/2" ply main spar joiners
in the wing.
Test fit
the die-cut plywood servo tray between
the R1 ribs. Use a metal straightedge to make sure the spars,
leading edge and trailing edge are aligned and straight. When
everything fits well, glue the servo tray to
both
R1 ribs, then
remove the joiner pieces in preparation for gluing.
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2. Be sure the wing is right-side up and flat on the
workbench, then use 30-minute epoxy to glue the leading
and trailing edge joiners in position. Next, install the top and
bottom main spar joiners, also using 30-minute epoxy.
Double check that there is no twisting or bowing and that
everything is straight before the epoxy cures.
★★★★
Pro Tip:
Clothespins or spring-clips can be used to
clamp the pieces together and phone books or magazines
can be used to hold the wing flat.
ADD WING SHEETING
Be sure the wing is pinned flat on your work surface from the
spar to the trailing edge before you begin sheeting.
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1. Glue a 1/16" x 1-1/8" x 24" trailing edge sheet to the top
of both wing panels.
R-1 CAP STRIPS
SHEAR WEBS
LE SHEET
2-3/8"
24"
6"
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2. Trim the four 1/16" x 3" x 30" balsa leading edge sheets
to 24".
Save the leftover 6" pieces for use later during construction.
Cut the 3" x 24" pieces down to 2-1/2" x 24". Save the 1/2" x
24" sticks to make the R1 capstrips.
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3. Align a leading edge sheet with a wing tip, then hold
it tightly against the leading edge while using thin CA to glue
it to the sub leading edge.
(See photo at step 5.)
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4. Carefully lift up the leading edge sheet, away from the
ribs. Working quickly, apply a bead of medium or thick CA to
each rib, then roll the sheet into contact. Hold the sheet until
the CA cures. Wick some thin CA between the sheet and the
spar to secure the aft edge of the sheet to the spar.
