Construction Manual
www.oldschoolmodels.com
Page 11
Step 74 - Stab Assembly (S1, S2 & S3)
Locate both S1s, both S2s, and
four S3s from BP3.
These are glued as shown to form
one S1, one S2, as well as two S3
pieces.
Step 75 - Stab Assembly (framing)
Cut a length of 1/4” x 1/2”
balsa to form the trailing
edge of the stab. Also cut
the two smaller strips that
form the leading edge.
Pin the trailing edge down
first, then glue the S1, S2
and S3 assemblies in place.
Next glue on the leading edge pieces.
Finally, from 1/8” x 1/4” balsa stick, cut, fit and glue in the internal
bracing.
Step 76 - Stab Assembly (gussets)
Locate SG1s, SG2s, SG3s and SG4s
from BP6. Refer to the plans as to
which goes where, then glue them in
position.
Make sure everything is securely
glued, then remove from the waxed
paper.
Prepare your work area
Now tape the vertical fin plan and a fresh piece of waxed paper on
your building board.
Step 77 - Fin Assembly (RD2 & RD3)
Locate two RD2s and RD3s from BP3.
These are glued as shown to form one
RD2 and one RD3.
Step 78 - Fin Assembly (framing)
Cut a length of 1/4” x 1/2” balsa to
form the trailing edge of the fin, and
another for leading edge.
Pin the trailing edge down first, then
glue the RD2 and RD3 assemblies in
place.
Next glue on the leading edge.
Finally, from 1/8” x 1/4” balsa stick, cut, fit and glue in the internal
bracing.
Step 79 - Fin Assembly (gussets)
Locate RG1, RG2, RG3 and RG4 from
BP1. Refer to the plans as to which goes
where, then glue them in position.
Before you remove the finished fin,
make a mark on the leading edge
where RD1 will be attached.
Make sure everything is securely glued,
then remove from the waxed paper.
Step 80 - Fuselage Assembly (elevator & rudder)
Locate both RUDs from BP7 and
four E1 from BP3. These are
glued together as shown here,
making two elevator halves and
one rudder. Make sure all is
properly aligned before the glue
cures.
Step 81 - Fuselage Assembly (wing alignment)
To align the wing properly on the
fuselage, place the wing in position, by
pushing the forward
wing retainer into
the slot the center of
R3/R4 (lightly sand if
necessary for a smooth
fit).
Then allow the wing to rest
in the wing saddle. The wing is
perfectly aligned when the distance
from the left wing tip to the rear of the
fuselage is the same the distance when
measured from the right wing tip.
Step 82 - Fuselage Assembly (drill wing bolt holes)
With the wing aligned, drill two 3/16” holes for the wing bolts,
using the pre-cut holes in H1 as a guide. Carefully drill down
through the wing into the H5/H6 assembly in the fuselage.
Use caution to make sure the wing does not move until both holes
are drilled.
When drilling, take your time and make sure the drill is held so the
bit is perpendicular with the wing’s sheeting. This will make it so
the wing bolt goes in at an angle, but the screw’s head will be flat
on the wing surface. Remove the drill, remove the wing and clean
up around the new holes you drilled.
Run a 1/4x20 tap through the H5/H6 pieces so that the wing
bolts will thread into this block. A few drops of thin CA will help
strengthen and secure the threads you’ve cut.
But, if you prefer, you can also use 1/4x20 t-nuts (not included).
Step 83 - Fuselage Assembly (enlarge bolt holes in wing)
Enlarge the bolt holes in the
wing from 3/16” to 17/64”,
allowing the wing bolt to pass
through easily.
Step 84 - Sanding (airframe)
Now is the time to get quite familiar with the sanding tools of your
choice. Take the time to preform a good sanding, rounding the
wing’s leading edge and blending it into the wingtips. Go over the
entire wing, making sure the sheeting is smooth and the trailing
edges are blended into the cap strips, continuing the curvature of
the wing.
Smooth out the edges of the fuselage. Because of the 1/4” framing
installed around the fuselage’s perimeter, you can be a little more
aggressive in rounding the corners.
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