Great Planes Sportster Bipe 40 Kit - GPMA0510 User Manual
Page 16
27.
PREPARE SMALL CABANE BLOCKS
Clearance holes will have to be cut in the small
cabane blocks for cabane wire clearance. Place the blocks on
the cabane wire ends. The blocks should line up with the top
of
the fuselage. Clamp the blocks to the fuselage.Do not glue
the
blocks yet!
28.
ALIGN THE TOP WING TO THE FUSELAGE
Align the Fuselage Reference Line (top side of the
fuselage side) parallelto the work surface. The fuselage should
be right side up. Place the top wing onto the cabanes. Line up
the top wing to the work surface and the fuselage as shown in
the drawings. Distance A should equal distance A, B should
equal B and C should equal C. When the top wing is properly
aligned, mark the positions of the cabane brace blocks in the
fuselage. Use slow set epoxy and glue the blocks in place. Fill
in the areas around the wires in the blocks with epoxy. Glue on
the 1/16 x 112
x
1-112 plywood cabane brace caps. Recheck
the alignment before the glue sets up.
When the glue is dry, fill in the
slots
in the cabane wing holders
in the wing with silicone. Put car wax or similar material on the
cabane wires and place the wing back on the cabanes. Remove
the excess silicone that may ooze out
of
the slot. This silicone
that you added makes a good seat for the wires and cuts down
on vibration. After the wing is covered later, you will attach the
top wing to the cabanes with the aluminum plates and the #2
x
3/8 screws provided.Ttie plates should be flush with the wing
sheeting. Note-Make sure you do not disturb the wing align-
ment when you apply the silicone to the cabane slots. The wires
should still touch the bottom of the slots in the holders; the
silicone fills in around the sides of the wires in the slot.
29.
0
PREPARETHE BALSA HOOD SIDE PIECES
The 1/4x 1-3/8x 17-1
I2 balsa hood side pieces need
to be twisted slightly
to
fit the front of the fuselage.
To
make it
easy to twist the balsa as required, "paint" some ammonia on
both pieces of the balsa sheets. Place one end in a vise and
twist the other end somewhat more than is required. Hold or
clamp this end until the wood dries (about 15 minutes). Note
that the twist inthe right piece is oppositethat of the left piece.
30.
GLUE ON THE HOOD SIDE PIECES
Sand the bottoms of the hood side pieces
so
they
will mate squarely with the fuselage sides. Notch out the side
pieces for cabane wire clearance. You can fill in these notched
holes later. Glue the side pieces from the front of former 3A/3B
to beyond former 1A in the following manner.To preventatwisted
fuselage, glue both pieces at the same time, a little at a time,
starting at former 3A/3B. Also make sure the hood side pieces
extend outside former 3A/3B and the fuse sides slightly
so
they
can be sanded to contour later.
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