Mountain Models C-180, Builder Manual, Page: 12 / 17

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! Rock the plywood center spar to the left so that the left side is touching the plans. Either weigh it
down or just hold it there. Glue the rest of the 1/8” spar to the center spar.
! Glue another set of split ribs in the next location to the left of center. Glue the rib with the slit in
the middle to the outer edge of the center spar.
!
Glue the remaining left side ribs into place.
! Cut and glue the 1/8” square top spar to the center spar and ribs.
! Starting where the center spar ends, glue the 4 spar webbings between the top and bottom spar on
the back of the spar.
! Glue the 3/16” square balsa leading edge in place.
! Glue the two 1/8” stringers to the ribs.
! Let the left side dry. Remove from the plans and relocate over the right wing plans. Rock the
wing to the right by shimming up the left side, keeping it square and build the right wing as above.
! Once the wing is dry remove it from the plans. Glue the other trailing edge to the top of the ribs
and glue the 1/16” trailing edge strengthening sticks between the top and bottom trailing edge.
! Position the ½” x 1 ¼” wing strut attachment point balsa plate to the bottom of the wing as shown
in the plans.