Raytheon Beech Baron E55 - Page 270

Raytheon
Aircraft
SEECH
BARON
55
AND
58
SHOP
MANUAL
The
left-hand
painted
aileron
assembly
must
be
nose-heavy
by
0.2
to
1.5
inch-pounds.
The
right-hand
painted
aile-
ron
assembly
must
be
nose-heavy
by
0.2
to
1.5
inch-pounds.
The
static
moment
of
the
aileron
is
determined
by
multiplying
the unbalanced
weight
of
the aileron
assembly
times
the
perpendicular
distance from
the
hinge
center-
line
to
the
center
of
gravity
when
the
chord line is
horizontally
level.
The
weight
is measured in
pounds
and
the dis-
tance in inches.
The
static
moment
of
a
100
percent
balanced control
surface
is
0.0
inch-pounds.
A
tail-heavy
surface
exhibits
static underbalance.
A
nose-heavy
surface exhibits
static
overbalance.
CHECKING
BALANCE
The
aileron
balance
must be
checked
in
a
draft-free
area
with the aileron
completely
assembled
in
flying
condition.
All
painting,
including
stripes
and
touch-up,
must
be
completed.
The
tab,
tab
pushrod,
static wicks and
hinge
bolts
must
be attached.
The
chord
line
must
be
horizontally
level and the
hinge
line must
be
properly
supported
when
the
static
moment
is
measured.
Although
many
different
methods
of
check
balancing
exist,
they
can
be
categorized
un-
der
the
following
two
headings:
a.
Counterbalancing
The
application
of
a
known force
or
weight
at
a
measured
distance from
the
hinge
line
to
counter
the unbalance
moment
of
the
aileron
assembly.
b.
Actual Force
Measurement
A
measurement
of the
force
applied
by
the aileron
surface
on a
single
support
at
a
known distance
from
the
centerline
of the
hinge.
NOIE
Counterbalancing
is
the
simplest
method
of check
balancing.
COUNTERBALANCING
METHOD
CHECK
BALANCE BY
COUNTERBALANCING
The
equipment
required
to
perform
the
check
balance
by
counterbalancing
is
as
follows:
a.
A
stand with
knife-edge
supports
as
illustrated
in
Figure
4-25.
The
knife
edges
must
be
in
the
same
horizontal
plane.
b.
A
paper
cup
or
similar
lightweight
container.
c.
Approximately
1
pound
of lead
shot.
d.
A
certified
beam
balance
weighing
device calibrated
in
units
of
0.01
pound
or
less.
e.
A
straightedge,
ruler,
and
spirit
level.
I
BALANCING
PROCEDURE
COUNTERBALANCING
METHOD
a.
Locate
the chord line
by
placing
a
straightedge
at
the
inboard
end of
the aileron
assembly
so
that
one
end
is
on
the
trailing
edge
and
the
other
end
is
centered
on
the
leading
edge.
Mark
the
chord
line
with
a
suitable
marker,
such
as
a
grease
pencil,
then
remove
the
straightedge.
b.
Secure
the trim
tab
(LH
only)
in
its
neutral
position
with
a
small
piece
of
masking tape.
c.
Fit
the
correct
size bolts in
the
hinge
brackets
and
mount
the
aileron
on
the
knife-edge
supports.
Ascertain
that
the
aileron
is
free
to
rotate
about
the
hinge
line.
d.
To
determine if
weight
should
be
added
or
removed,
suspend
a
paper
cup
from
a
point
near
the
center
of
the
aileron
trailing
edge.
Use
a
short
length
of small
diameter
string
secured to
the
surface
with
a
small
piece
of
masking
tape
as
illustrated
in
Figure
4-25.
The
cup
must
be
free
to
hang
vertically.
4-62
E16