GREAT PLANES Rapture 40 Instruction Manual page 20

6. Use a ballpoint pen and a straightedge to draw a
vertical line on the front of the firewall connecting the
punchmarks in the middle. Drill 5/32" [4mm] holes through
the remaining four punchmarks. Press four 6-32 blind nuts
partway into the holes on the back of the firewall. Add a few
drops of medium CA to the blind nuts where they will contact
the firewall, then tap the blind nuts the rest of the way in with
a hammer. Wipe away excess CA. If using the O.S.
.40 or .46 FX, drill the 3/16" [4.8mm] hole in the back of the
firewall for the throttle pushrod tube the rest of the way
through. If using a different engine do not drill the hole (the
hole for the throttle pushrod will be drilled later).
7. Pin the aft fuselage top upside-down to the building
board over its location on the plan. You'll know it's upside-
down when the front aligns with the plan.
8. Glue the die-cut plywood formers F2 through F6 to the
aft fuselage top. Do your best to get the formers vertical, but
if they aren't perfect the notches in the fuselage sides will
square 'em up anyway.
® MAX
9. Join, but do not glue the right and left fuselage sides
to the fuselage top and formers. Use some of the leftover
balsa sticks cut from the ends of the wing to hold the
fuselage sides to the fuselage top.
10. Use thin and medium CA to glue the fuselage sides
to the fuselage top and formers aft of F2. Do not glue the
fuselage sides to the fuselage top forward of F2. Making
sure all glue joints are tight and fit well is the way to a true
and square fuselage.
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