Construction Manual
www.oldschoolmodels.com
Page 13
German
Sunday Fighter
Heinschmitt
Step 91 - Fuselage Assembly (fin/stab)
Now locate the vertical fin
and stab you constructed
earlier. Take a few moments
to round off a smooth radius,
on each edge of both pieces,
except for their trailing
edges.
Test fit the fin into the stab,
making sure it is firmly and
completely pushed into the pre-cut slot in the center of the stab.
Sand as necessary to get a good, slop-free fit.
Step 92 - Fuselage Assembly (fin/stab)
Remove the tape
from the rear of the
fuselage, and trial fit
the stab on to the rear
of the fuselage.
With it pushed into
position as shown
in this photo, place
the fuselage on your
building board and make sure that the stab is level with the building
surface. Lightly sand the fuselage as necessary to level the stab.
Step 93 - Fuselage Assembly (fin/stab)
Remove the stab and cut two
lengths of 1/4” square balsa scrap
roughly 3-3/8” long.
These are glued in as stab
supports, inside the fuselage sides
and flush with the top edges.
Step 94 - Fuselage Assembly (fin/stab)
Now it’s time to attach
the fin and stab to the
fuselage. First glue the
vertical fin to the stab and
make sure that the fin is
90° to stab’s surface.
Then glue this assembly
to the fuselage. Make sure
that the stab is properly
positioned, pushed up-against F8 and the long trailing edge of the
vertical fin is between the fuselage sides.
When properly positioned, the vertical fin should also be centered
on the top, center stringer installed a few steps back.
Step 95 - Fuselage Assembly (fin/stab fillets)
Using two pieces of 1/4” x 1/2”
scrap balsa, form two fillets
that will go on each side of the
vertical fin as shown here.
While these will provide a bit of
stability to the vertical fin, they
also allow the turtledeck to flow
into the fuselage in a way that’s more pleasing to the eye.
It’ll take a bit of time to cut, trim and sand these so they continue
the turtledeck’s vertical and horizontal tapers into a point.
When you’ve made matching left and right fillets, glue them in
place.
Step 96 - Fuselage Assembly (elevator/rudder pushrods)
Before the bottom of the fuselage is sheeted, now is a good time
to plan the route of the rudder and elevator pushrods through the
rear of the fuselage.
We chose to use DuBro’s flexible pushrod system in our prototypes,
but use what works for you. If using a flexible pushrod system,
you’ll need to secure the outer tubing in a few spots to keep it from
flexing. We’ve included several pre-cut holes in the rear formers to
help “snake” and support those outer sleeves.
Step 97 - Fuselage Assembly (TW1/TW2)
Locate TW1 from LP1 and TW2 from
LP2. These are glued together as
shown here, centered and aligned on
this single edge.
Then this assembly is attached to
the bottom of the fuselage as shown. You
might need to trim a little of the trailing
edge of the vertical fin to obtain a good
fit. Glue in place when satisfied with the fit.
Step 98 - Fuselage Assembly (F6 support)
Using a length of scrap 1/8” square
balsa, cut a length that will span
across the bottom of F6, running
between the fuselage sides. Glue
this in position.
Step 99 - Fuselage Assembly (top sheeting)
Using pieces of 1/16”
sheeting, it’s now time to
sheet the bottom of the
fuselage. It will take two
pieces to do this.
Measure and cut two
pieces, slightly oversized
to form the sheeting of the
fuselage top, between F3
and TD3 as shown here.
In order to get the balsa
to easily bend, we recommend using Windex® glass cleaner to
loosen up the grain. We found it best to do one half a time and
using a hair dryer or covering heat-gun to help “set” the balsa’s
bend. Once dry, the you can glue it in position.
Do the same for the other side.
Step 100 - Fuselage Assembly (fuse hatch framing)
Locate some scrap 1/8” square balsa, both H1’s from LP2 and LP4,
and a couple pieces of waxed paper.
Cut two pieces of waxed paper to fit against the front and rear
formers of the hatch area and press the H1’s in position.
Measure and cut the 1/8” square balsa to form the stringers that
Align here
British version
shown.
British version
shown.
British version
shown.
