Construction Manual
www.oldschoolmodels.com
Page 5
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Step 13 - Wing Assembly (SPACER)
Locate SPACERs from LP1. These
are just as the name implies -
simply spacers and should NOT
be glued into the airframe at any
point.
Notice that the pre-cut rectangular
spars holes in R3, both R2’s and R1
are wider than the spars that are in
them. This is to allow for the dihedral braces that will be attached
later on. But you need to make sure the spacing is correct when
gluing the spars in place, hence the use of the SPACERs.
Use one SPACER piece as a substitute for the front dihedral brace
first, by sliding it into the holes on the R1, R2 and R3 ribs. This
should push the spar towards the rear of the pre-cut slots. Then
do the same with the other SPACER for the rear spar holes - again
pushing the spar towards the rear of the cutouts in each rib.
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Step 14 - Wing Assembly (R3)
With the SPACERs in place, carefully align rib R3 and the outermost
R2 rib, then tack them in place to the spars (best to tack glue on the
back side of the spars). Make sure that the SPACERS are not glued
to spars or any of the ribs as they will be VERY hard to remove.
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Step 15 - Wing Assembly (WH3)
Locate one of the WH3s from LP1.
It’s outer tabs fit into the pre-cut
slots on the back of the R2 ribs as
shown here. Glue it to the outer
R2 rib first, then properly align the
inner R2 rib. Once aligned, glue
that R2 rib in place by tacking it in
place to the back of the spars, and
then glue the WH3 to it as well.
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Step 16 - Wing Assembly (WH1, WH2, WH4)
Locate WH1, WH2, and WH4 from LP1. Note that
WH1, WH2 and WH4 have a small circle engraved
on one side. This designates the side that should
face R1 because it has a small angle pre-cut into
it. Glue each WH1, WH2 and WH4
to R2 making sure their tabs are
completely inserted into the holes
on the innermost R2 rib.
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Step 17 - Wing Assembly (R1)
Locate DH-JIG from LP1. This is used to help
align R1 in this step. WH1, WH2, and WH3
already have this angle cut into them, but
you can also use this DH-JIG to further aid
the R1 alignment. Slide each of the tabs from
those WH pieces into the pre-cut holes of R1,
making sure they are completely inserted. When properly aligned
you should be able to double-check it with the DH-JIG.
After everything is aligned, tack glue R1 to the back of the spars,
then also glue R1 to WH1, WH2 and WH3.
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Step 18 - Wing Assembly (SPACER)
With the ribs all in place, carefully remove the SPACER pieces and
then glue ribs R3, R2 and R1 to the spars. Make sure you do NOT
have any extra glue fouling the holes where the dihedral braces
will slide into.
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Step 19 - Wing Assembly (R1A)
Locate two of the R1A pieces from
LP1. These are glued into the center
rectangular cutout in WH4 and WH3 as
shown here, pointing towards the trailing
edge of the wing. Make sure they are
firmly seated as the glue cures.
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Step 20 - Wing Assembly (trailing edge)
Locate one 1/4” square length of balsa
strip. This will be the trailing edge of
the wing. Measure and trim it to length,
leaving about an extra 1/4” or so. Then
carefully slide it on to the back of each
of the ribs and it should be held in place
between the two “fingers/fangs/points”
on the back of each rib. Working from one side to the other, glue
the trailing edge to each of the ribs, making sure that the alignment
of each rib is still spot on.
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Step 21 - Wing Assembly (leading edge)
Locate one length of 1/2” square
balsa strip. This is the leading edge
of the wing. Measure and trim it to
length, again, leaving about a 1/4”
extra. Working from one end to
the other, glue the leading edge in
place to each of the ribs, making
sure it is firmly seated into the pre-cut, angled slot of each rib.
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Step 22 - Wing Assembly (trailing edge sanding)
You'll now need to very lightly sand the
trailing edge. Refer to this diagram to
show what I'm on about. The trailing
edge needs just a little sanded off the
rear edge it so it will continue the airfoil
shape. Do this for the top and bottom
surface of the trailing edge.
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Step 23 - Wing Assembly (CS1, CS5)
Locate one CS1 from BP15 and one CS5
from LP7. CS5 fits into the pre-cut notch
of CS1 as shown here. Before gluing
it place, lightly sand the edges of CS5
where it will contact CS1, so you’ll have
a good fit. When happy with the fit, carefully apply glue to the
two contacting edges of CS5 and attach it to CS1. Apply a bit of
downward pressure along the seams to make sure the joint is flat
along the edges as the glue cures.
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Step 24 - Wing Assembly (CS1, CS2, CS3)
Take CS1 from the previous step, and locate one CS2 from BP15
and one CS3 from BP16. After trimming, these will all be glued
together to form the top sheeting of the wing’s center section.
Place the CS1 assembly in place on the rear section of the wing,
then place the CS2 on the front edge, simulating how it will wrap
around the leading edge rib curve (temporarily tape in place if that
Sand this lip to
match airfoil
