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B. Preparing the Foam
B1. Sand the foam using #120 grit sand paper on a sanding
block. The foam should have a smooth texture after sanding is
completed. Be extremely careful not to distort the foam in any
way. Sand edges and curves very lightly. Enough pressure should
be applied to smooth out the foam, not to change its shape.
When sanding the leading edge’s airfoil, remove the sand paper
from the block and sand around the contour of the airfoil. Be care-
ful not to distort the airfoil. Doing so will make the wing ineffi-
cient.
Smooth out all other foam parts in the same manner.
C. Wing Assembly
C1. Line up the gear block pieces and the notched gear block
piece as shown in the image above. The layout should be three
gear block pieces, a notched gear block piece, three more gear
block pieces.
C2. Glue the pieces together to form one gear block with a
notch in the middle as shown in the image above. Use clamps to
keep the assembly together as the glue sets. Once the glue has set,
sand all edges flush for a smooth finish.
C3. Remove the foam center insert from the wing core.
Temporarily install the fuselage into the leading edge of the wing
core and lay the foam center along the side of the fuselage. Place
the foam center 3/4” from the trailing edge of the wing. DO NOT
GLUE THE FUSELAGE AT THIS TIME.
C4. With the fuselage in place and the foam center piece 3/4
of an inch from the trailing edge, make a mark along the back of
the fuselage onto the side of the foam center piece. The mark on
the foam center piece should be at the same angle as the fuselage
back plate.
C5. Extend your line all around the foam center. Using a
hobby saw or sharp hobby knife, cut along your line marks. Sand
the backing where the cut was made and check to make sure the
angle of the cut is the same as the angle of the fuselage back plate.
