Wing Assembly - Seagull Models Extra 300S Assembly Manual

EXTRA 300S

WING ASSEMBLY

NOTE: We highly recommend using 30
minute epoxy as it is stronger and
provides more working time, allowing
the builder to properly align the parts.
Using fast cure epoxy when joining
the wing halves could result in the
glue drying before the wing halves
are aligned properly which may result
in failure of the wing centre section
during flight.
! 1.
Locate the plywood wing dihedral
brace. Using a ruler, locate its centre
and draw a vertical line .
! 2. Test fit the dihedral brace into each
wing half. The brace should slide in
easily up to the centreline that you
drew. If not, use 220 grit sandpaper
with a sanding block and sand down
the edges and ends of the brace until
it fits properly.
! 3. Remove the brace when satisfied
with its fit in each wing half. Coat both
sides of one half of the dihedral brace
with 30 minute epoxy. Next, pour
some epoxy into the dihedral box in
one wing panel. Make sure you cover
4
Centre line.
Instruction Manual
the top and bottom as well as the sides of the
dihedral brace. Use enough epoxy to fill any
gaps.
! 4. Insert the dihedral brace into the dihe-
dral box up to the centreline. With
paper towels and rubbing alcohol,
wipe off any excess epoxy that may
have squeezed out of the joint. Next
pour some epoxy into the dihedral
box in the other wing panel. Apply
epoxy to the exposed portion the brace
and to the wing root of both wings.
Carefully slide the two wing halves together
and firmly press them together, allowing the
excess epoxy to run out. There should not be
any gap in the wing halves. Use rubbing
alcohol and a paper tower to clean up any
excess epoxy.
Apply masking tape at the wing join to hold the
wing halves together securely. Allow the epoxy
to cure before installing the aileron servos.
Epoxy