Installing Flaps And Servos - Carf-Models MiG-15 Construction Manual

5. Installing Flaps and Servos

Working Steps:
- cut flap servo hatch and mount servo
- install control horn and linkage
- install inner scale surface into the flap
You need:
- cutter (X-Acto Knife), sand paper
- CA Glue, Epoxy glue
- your wings
- 2 control horns large, 2 all thread M3, 4 clevises, 4 nuts M3,
- 2 servos, 2 milled servo mounts, balsa reinforcement parts
- 2 vacuum formed flap insides
Y
our MiG-15's flaps are
already precut and hinged with
a special nylon elastic hinge.
The flaps are stiff already, but
will need some more rib and
spar structure, especially to
mount the scale inner surface
plates. This gives a
sophisticated scale impression
on the plane on the ground,
when the flaps are down.
Start with cutting the servo
hatch. Locate the hatch in the
center of the flap, and see the
photos. Use panel lines as
cutting line. The wing skin cuts
easily with a cutter only.
Tip for the Pro's:
The elastic hinge is a very
common way to hinge any
control surface, which has only
throw to one side or the throw
to the other side is at least not
too much. Contest pattern
planes, TOC-Planes, also
gliders and F5-E composite
wings have this kind of hinging.
It is one of the most reliable
methods to hinge any control
surface.
Some important notes on the
"Elastic Hinge" in General:
The hinge is set up as a layer
of special "Perlon" cloth, which
does not soak up resin during
the laminating process. This
cloth is embedded in 2 layers
of fiberglass, so that the skin
around the hinge is hard. To
make the hinge flexible, both
glass layers must be cut or
broken, to achieve flexibility in
exact the hinge point.
Done right, this kind of hinge
is unbreakable, and it will take
many thousands of deflections
with no wear and tear. You
should keep CA-Glue away
from it, though.