Pfalz
DIIIa
41”
Page
3
Copyright©
2005
‐
11
M.K.
Bengtson
All
Rights
Reserved
Rev
07/11
Aileron
Servo
FUSELAGE
CONSTRUCTION
The
fuselage
is
build
using
1/16”
balsa
sheeted
former
and
keel
construction.
The
lower
wing
is
built
in
one
piece
and
glued
to
the
fuselage.
The
fuselage
and
lower
wing
have
undercarriage
attachment
points.
Begin
by
assembling
the
top
and
bottom
keels
on
the
plan.
Assemble
the
right
and
left
side
keels.
The
right
side
keel
is
shorter
than
the
left
side
keel.
The
shorter
keel
provides
for
right
thrust.
The
down
thrust
is
also
built
in
due
to
the
length
difference
in
the
top
and
bottom
keels.
Fuselage
Construction
Detail
Build
the
left
fuselage
side
frame
over
the
plan
including
the
side
keel.
Add
the
front
former
F1
and
the
last
former
F11
then
the
longer
side
keel.
Using
the
side
keel
as
a
stabilizer,
the
other
formers
are
added.
Note:
the
main
fuselage
side
formers
are
labeled
on
the
bottom.
They
should
be
placed
so
that
the
label
is
readable
i.e.
not
upside
down.
Fuselage
Construction
Detail
The
frame
is
removed
from
the
building
board.
Glue
the
F1
and
F11
former
carefully
and
add
the
shorter
side
keel.
The
remaining
formers
are
glued
to
the
frame
using
the
left
side
as
a
guide.
Formers
F12
are
placed
on
both
sides
of
the
keel
to
form
a
slot
for
the
horizontal
stabilizer
so
take
care
in
gluing
these
in
place
or
the
horizontal
stabilizer
will
be
misaligned.
Attach
F0
to
serve
as
a
base
for
the
1/16”
ply
motor
mount.
Be
careful
to
ensure
that
right
and
down
thrust
is
present
at
this
time.
It
may
be
required
to
ream
out
F0
a
bit
to
allow
clearance
for
the
motor
housing
so
dry
fit
the
motor
at
this
point.
There
are
markings
of
the
formers
that
show
the
locations
of
the
cabane
and
landing
gear
attachment
cross
members.
Made
from
1/4”
square
bass
or
spruce,
these
should
be
attached
at
this
time.
It
may
be
preferable
to
pre
drill
1/16”
holes
in
the
ends
before
attaching
the
cross
pieces
to
the
frame.
Alternate
structures
may
be
fabricated
from
3/32”x1/16”
and
3/32”x1/4”
basswood
strip
stock.
Using
this
method,
a
channel
is
formed
that
passes
through
the
center
of
the
¼”
square
cross
piece.
No
drilling
is
required.
Also
add
the
other
formers
F1a
and
F4a
that
serve
as
attachment
points
for
the
removable
dummy
motor.
It
is
easiest
to
attach
the
4
‐
40
blind
nut
in
the
hole
in
F1a
before
gluing
it
in
place.
Fashion
a
battery
tray
out
of
1/8”
balsa
and
scrap
cross
pieces
at
this
time.
Note:
the
AXI
motor
is
attached
to
the
front
motor
mount
through
the
dummy
motor
access
area.
Be
sure
that
there
is
room
to
attach
it
before
adding
the
tray.
Pre
fit
the
R/E
servos
on
bass
crosspieces
in
the
cockpit
