BE2c
36
7/8”
Page
4
Copyright©
2007
‐
11
M.K.
Bengtson
All
Rights
Reserved
Rev
07/11
lower
wing
ailerons
also
have
the
balsa
control
horn
mount
labelled
‘3’;
this
is
flush
with
the
lower
surface
of
the
aileron.
Parts
W3
and
W4
need
shaping
to
suit,
W3
being
tapered
to
suit
and
W4
trimmed
to
the
wing
cord
(thickness)
before
being
fitted.
Sheet
the
root
wing
panel
(upper
surface
only)
with
1/32”
balsa
as
indicated
on
the
plan.
Epoxy
in
the
1/8”
dowels
leaving
1/8”
protruding
which
will
locate
in
the
holes
provided
in
the
fuse
sides.
Four
strong
wings
Aileron
Servo
hatch
/
mounting
If
you
are
not
using
the
under
camber
option,
glue
the
¼”
x
¼”
servo
rails
in
position
between
the
ribs
over
the
plans.
If
you
want
the
ply
cover
recessed,
put
some
1/32”
packing
between
the
plan
and
the
rail
as
you
position
it.
(Don’t
glue
in
the
packing!)
Also
if
you
are
recessing
the
cover,
add
another
piece
of
1/8”
balsa
to
the
front
servo
rail
flush
with
the
wing
ribs,
to
‘finish
the
box’
and
attach
the
covering
material
to.
Servo
hatch,
under
camber
and
recessed
.
If
you
are
using
under
camber,
wait
till
the
lower
wings
are
completely
dry.
Mark
the
positions
of
the
servo
rails
on
the
wing
ribs
from
the
plans
then
lift
the
wings.
Test
the
rails
in
the
marked
positions
flush
with
the
sanded
lower
surface
of
the
wing
ribs
by
using
the
ply
hatch
to
check.
To
recess,
push
in
the
hatch
so
it’s
flush
with
the
ribs.
Tack
the
rails
in
place,
check
with
the
ply
hatch
all
is
nice
and
flush,
remove
hatch
and
secure
the
rails.
Also
if
you
are
recessing
the
cover,
add
another
piece
of
1/8”
balsa
to
the
front
servo
rail
flush
with
the
wing
ribs,
to
‘finish
the
box’
and
attach
the
covering
material
to.
The
servo
is
attached
to
the
hatch
by
gluing
it
directly
or
screwing
it
to
blocks
glued
to
the
hatch.
Here
blocks
are
glued
to
the
hatch
to
position
the
servo
and
silicon
will
be
used
to
glue
in
the
servo
so
that
it
could
be
recycled.
Some
builders
wrap
the
servo
in
tape
then
glue
the
taped
servo
in
place.
Later
cutting
the
tape
will
release
the
servo.
Joining
the
upper
wings
Assemble
the
centre
section
of
the
upper
wing,
joining
the
3
ribs
to
the
ply
trailing
edge
pieces
and
a
section
of
prepared
leading
edge.
Install
a
piece
of
1/8”
x
¼”
spar
material
to
the
back
of
the
spaces
in
the
ribs.
Prepare
1”
x
6”
blocks
which
will
go
under
the
wing
tips
as
they
are
assembled,
to
establish
the
dihedral
angle
of
the
wings.
Trail
fit
the
four
ply
dihedral
braces
to
the
upper
wings.
A
small
file
will
help
relieving
the
slots
in
the
wing
ribs
if
they
are
too
tight.
The
braces
may
need
trimming
so
they
meet
at
the
centre
line
without
interference,
check
this
over
the
plan.
When
the
fit
is
good,
epoxy
them
in
place.
Locate
the
wings
over
their
position
on
the
plan
with
the
1”
blocks
under
the
tips,
apply
epoxy
to
the
assembled
centre
section
ribs
and
‘spar’
and
slide
it
down
between
the
wing
ribs
slotting
the
ply
dihedral
braces
into
position.
Check
that
the
centre
section
is
sitting
flat
on
the
work
surface,
the
wing
tip
dihedral
blocks
are
in
correct
position
and
that
the
wings
at
that
point
are
sitting
flat
on
the
blocks.
Check
you
have
a
nice
straight
line
along
the
leading
edge.
Upper
wing
centre
section.
