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CARF-Models Ltd.
Inner Flap: Drill a 3mm hole into
the root of the most inner flap at
the same distance from the axis of
rotation as the control horn is
mounted on the outer flap. This is
to mount an M3 ball link to the
root of the inner flap. As you can't
install a T-Nut from the inside, we
opted to use a short piece of
threaded rod, glued in with epoxy.
Behind the surface is a plywood
reinforcement. If you do not find a
plywood reinforcement when you
drill, just mill out the whole
surface in front of the flap spar and
insert a piece of scrap plywood.
Glue with resin.Here, however,
you indeed could use a 3mm T-Nut
from the inside, because the inside
is accessible. Mount an M3 ball
link, either with an M3 bolt, or
with an M3 secure nut on to the
threaded stud. Drill/mill an
elongated hole for the pushrod into
the spar.
Using 2 channels for the flaps, you
would use 2 y-harnesses and
combine each inner and outer flap
to one channel, and vice versa.
The middle flap moves by a sliding
plate interlocking into a slot. Mill a
long slot in the butting surfaces
and glue the phenolic plate into the
inner flap. Please make sure that
the angle of that plate follows the
curve of the trailing edge
somewhat, so that it will not bind
inside of the small, curved middle
flap. The slot in the middle flap
needs to be nice and tight around
the plate, so that the middle flap
does not "rattle" on the plate.
However, it really is enough to slot
the fiberglass surface. Any
additional reinforcement of that
slot is not necessary.
Instruction Manual F4U-1D Corsair
Inner flap: M3 bolt or all thread stud glued in.
Middle flap:
Slider glued into inner flap - middle flap slotted.
Allow flexing of flap hinges!
info@carf-models.com
Page 25
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