Page 16
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Construction Manual
German
Sunday Fighter
Heinschmitt
Step 118 - Fuselage Assembly (center cabanes)
Lastly, each cabane will need a small
taper filed/sanded in the outer surface.
The outer surface is CB2 - the one
WITHOUT the rectangular cutouts.
Just above the mounting holes, sand
a bevel as shown here on each side.
The bevel should start at the top of the
mounting hole and gradually get a little
deeper towards the top of the cabane assembly. It only needs
to be partly through the top layer of plywood, so take care that
you don’t take off too much. These bevels will give the proper
clearance for the top wing’s mounting lugs.
Step 119 - Fuselage Assembly (outer struts)
Locate all CB3’s and CB4’s from LP5. These are used to make the 4
outer struts. Two matching pieces are laminated together to form
each outer strut. Tape, weight or clamp these pieces together so
they’ll stay perfectly aligned while the glue cures.
Note that there is a difference in the curvature on the ends of CB3
compared to CB4. The rounder profile are the forward struts and
the more-squared profile, the aft struts.
Step 120 - 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 each
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, continuing the curvature of the wing.
Smooth out the edges of the fuselage and the struts, but don’t go
too far.
For the control surfaces (elevator and rudder), sand bevels into the
leading edges and round their trailing edges.
Step 121 - Fuselage Assembly (wing alignment)
To align the lower wing properly on the
fuselage, place the lower
wing in position, by
pushing forward wing
retainer into the slot cut
into F3/F4. 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 122 - 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 each WH2 as a guide. Carefully push the
bit down through WH2 before drilling. Once the bit is resting on
the surface of the un-drilled WH1, then carefully drill through the
wing and through all of the WH4/WH5’s installed 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. Then run a 1/4x20 tap through the WH4/WH5
assembly so that the wing bolts will thread into this block. If you
don’t have access to a 1/4x20 tap, you can also use a 1/4x20 steel
screw.
A few drops of thin CA will help strengthen and secure the threads
you’ve cut after they’ve been tapped.
If you prefer, you can also use 1/4x20 t-nuts instead of threading
into the wood (not included). To use these you will first have to
enlarge the holes you just drilled to 1/4”.
Step 123 - Fuselage Assembly (center cabanes)
Now it’s time to glue the center
cabanes to the fuselage. They
are designed to only fit one way
so you can’t mix them up. Test
fit them to the fuselage first,
making sure they fit over the
fuselage’s extended tabs and
seat firmly against the fuselage.
When satisfied with their fit,
remove them and glue them to
the fuselage with a bit of epoxy.
Clamp into position until the glue cures.
Step 124 - Main gear assembly (prep)
It’s time to assemble the main landing gear. You’ll find the front and
rear pieces included in the kit.
Place the included nylon landing gear straps in position - 2 for the
front, 2 for the rear. These straps are mounted to front and rear of
LG5.
Position the gear strut wires similarly to how we show in the
following photo, then mark and drill 1/16” holes where the straps
should mount, then attach them using the supplied 2-56x3/4” self
tapping screws.
Step 125 - Main
Gear Assembly
(soldering)
With the gear pieces
mounted, rotate the
rear wire so it is roughly
perpendicular to the
fuselage. Then rotate
the front wire so the
angled ends meet the rear wire. Both pieces of wire need to be
lightly sanded and cleaned where the wires touch, both on the left
and right side.
After cleaning, carefully and tightly wrap this joint with wire as
shown here using. We used 26 gauge wire, but other thicknesses
can be used.
Starting on one side, lightly brush on a bit of flux over the entire
wire-wrap, then use a small torch (or a soldering iron) to securely
older the wire wrap in position, securing the front and rear landing
gear wires into a solid, one piece unit.
When finished, do the same to the other side of the gear and you
should have something like this when finished.
A1
A1
