Owner manual

❏❏9. Bevel the front of the flap to match the angle

of the plywood flap ribs.

❏❏10. Drill a 1/16" [1.6mm] hole through the

punchmark in the die-cut 1/16" [1.6mm] plywood flap

control horn. Fit but do not glue the horn into the

flap next to the flap rib where shown on the plan for

the flap you are working on. Mark, then cut the 1/2" x

1" x 24" [13 x 25 x 610mm] balsa flap leading edge

into two pieces at the horn.

❏❏11. Position the shorter piece of flap leading

edge on the flap next to the horn. Note how the flap

leading edge is positioned so that the top aligns with

the top of the flap and the excess extends below the

bottom of the flap. Use a ballpoint pen to mark the

outline of the horn onto the end of the leading edge.

❏❏12. Cut a 1/16" [1.6mm] deep groove in the

leading edge piece between the lines marked noting

the horn.

❏❏13. With the flap horn still in position, permanently

glue the longer section of flap leading edge to the flap,

but do not get any glue on the horn as it will need to be

removed. Remove the flap horn, then use a couple

drops of thick or medium CA to tack glue the shorter

section of leading edge to the flap.

❏❏14. Shape the top and bottom of the flap

leading edge to match the flap, but do not round the

leading edge until instructed to do so.

❏❏15. Sand the ends of the flap leading edge even

with the flap ribs on both ends of the flap. Glue one

of the die-cut 1/8" [3.2mm] plywood flap ends to the

end of the flap and the longer, permanent section of

flap leading edge. Glue another flap end to the other

end of the flap, but not to the short section of flap

leading edge that is tack glued to the flap.

❏❏16. Shape the flap leading edge to match the

flap ends.

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