the plans, then start punching out the spar parts. Lay a 60"
straight edge/ruler on your workbench as a guide to assemble the
main spar straight; then tape spar to ruler.
inner pieces and use as a guide to properly align the spar &
doubler and then epoxy in doubler in place but only on one side.
(as shown above) and let epoxy cure.
While the spar/doubler
cures prepare the bellcrank mount.
balsa B.C. cores to one ply B.C. doubler. Leave a 1/8" space
between the balsa core pieces. Use the B.C. pivot shaft for proper
spacing. Once done, add the 2nd plywood B.C. doubler and remove
B.C. pivot shaft. let cure. Do not install BC mount at this time.
* The leading edge is constructed by first joining two pieces of
the laser cut 1/16"x 3/8" balsa center cores.
main spar is now ready
Join the two pieces of 7/16" x 1/4" balsa and then glue to the top
and bottom, on both sides of the wing sand to shape as shown on
L.E. center cores, mark parts center and tip
ends before removing from sheet .
Start assembly of the L.E. center cores by using the straight edge
that was used to assemble the main spar and repeat the same
With the center core marked and ready and without removing it from
the straight edge add the first piece of 1/4" x 7/16" balsa on to
the top of the center core. Be sure you leave the small notches
exposed and also make certain to leave it attached to the ruler so
this remains straight or the L.E. will not be straight and true
and will surely cause a warp.