Page 6
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Construction Manual
A bevel will need to be sanded,
similar to what is shown in this
photo. Doing this will allow this
assembly will rest flush against
WH4, already installed in the wing.
Sand a little at a time until you
have a perfect fit, then glue the W3
assembly in position.
Step 24 - Wing Assembly (install servo hatch mounts)
Remove the wing from the
building board and flip it
over. The two R4 ribs have
pre-cut slots. Measure and
cut the left-over 3/16” x
3/8” basswood to make
two servo hatch mounts.
When satisfied, glue them
in position, making sure to
press them all the way into
the slots. They should
not be flush with the outer rib surface.
Also cut a length of leftover cap-strip to span the R4 ribs. It will fit in
the notch just behind the rear hatch mount. Glue in place.
Step 25 - Wing Assembly (cut lower sub-spar)
Measure and cut a 3/16”square
balsa strip to create the lower
sub-spar. Press it into position
and glue to all the ribs.
Step 26 - Wing Assembly (remove tabs)
Remove all of the tabs from the bottom of each rib. Each cut
should follow the curvature of the rib. Doing this will allow the rear
cap strips to be installed correctly.
Step 27 - Wing Assembly
(sheeting)
Locate one of the WSC pieces from BP6.
It will be used as the rear portion of the
bottom sheeting. You’ll see a hole precut into this piece and when
properly positioned, it will
line up with the hole precut
into WH4 (already installed in
the wing).
Using the same techniques
as you did on the top half,
create the length of sheeting
by measuring and gluing a
couple of additional pieces
to the edge of WSC.
When the glue has cured, trim, then glue the sheeting in place on
the wing. This time, start at the trailing edge, making sure that the
WSC hole lines up with WH4’s hole. Glue a little at a time, pressing
the sheeting firmly against the ribs and wait for the glue to cure
before gluing the next section of sheeting - slowly working your
way forward to the leading edge.
Step 28 - Wing Assembly (lower cap strips)
Just as you did for the top of the wing, cap strips will now be
attached to the bottom of the wing using several of the 1/16th x
1/4” x 36” balsa strips. Also cut and glue a cap to the horizontal
balsa strip glued behind the servo mount in step 24.
Step 29 - Wing Assembly
(cut holes for servo wires)
On the plans you'll see a callout
suggesting a spot where a hole needs
to be cut in the top sheeting. This
hole allows the aileron servo wires to
pass through the sheeting and exit
the wing. Make these roughly 1/2 to
3/4 inch in diameter.
Step 30 - Wing Assembly (sanding)
Remove the wing from the board and now it’s time to sand. Make
sure to round the leading edge, remove any extra glue that may
have dripped, taper the trailing edge, and also sand the root rib to
remove any extra length from the spars and sheeting.
Step 31 - Wing Assembly (wing
dowel)
Locate the 6” length of 1/4” dowel. Cut a
2-1/2” length and round the end as shown
in the photo. Place glue on the lower part
of the dowel and insert it into the cutout
you made in the leading edge of the wing. Push the dowel through
WH1 and WH2, leaving approximately 1/2” of the dowel exposed.
Step 32 - Wing Assembly (left wing construction)
Set the right (starboard) wing half aside and begin work on the left
(port) wing half. Tape the left wing plan and fresh wax paper on
your board. Then follow steps 1 through 34 to complete the left
wing half. Once finished, then move on to step 36 to complete the
wing assembly.
Note that when building the left half that many of the parts
will need to be glued to the opposite side (the sheer webs, for
instance). Always refer to the plans to make sure you’re gluing the
parts together in the correct way.
Step 33 - Wing Assembly (DH1/DH2 install)
Be sure to have some paper towels and rubbing alcohol handy
to clean up any drips and/
or fingerprints that might
occur during this step.
Start with left wing panel.
Locate two balsa DH2’s
from BP3 and DH1 from
LP3. Note that these pieces
only fit properly one way.
Similar to the WB1’s from earlier, the DH2’s have a small circle
engraved in them, and this circle should be positioned to the top
and center of the wing.
These three pieces form a “sandwich” of sorts with DH1 fitting
between the DH2’s, then sliding into the dihedral box in one of
the wing halves. Test fit the parts into the slot as shown here. The
brace should snugly slide into each wing exactly half way. Carefully
sand as needed.
Remove
tab.
Cut to extend
rib’s curve.
