Raytheon Beech Baron E55 - Page 275

Raytheon
Aircraft
BEECH BARON
55
AND
58
SHOP
MANUAL
d. To
determine if
weight
should
be
added
or
removed,
use
a
short
length
of small-diameter
string
secured to
the
surf
ace
with
a
small
piece
of
masking
tape
and
a
cup
hanging
vertically
as
illustrated
in
Figure
4-26.
Slightly
loosen
the
forward
top
screw on
the
tip
of
the elevator
leading
edge.
Suspend
a
paper
cup
on
the
inboard
side
of
the
tip
and
wrap
the
string
around
the
screw.
Secure
the
string
to
the
surface
with
a
small
piece
of
masking
tape
aft
of
the
top
forward
screw
and
near
the
hinge
center
line
as
shown
in
Figure
4-26.
The
cup
must
be
free
to
hang
vertically.
PCAUTION
j
CAUTION
Be
certain the
forward
top
screw
on
the
tip
of
the
elevator
leading
edge
is
secured
after
the elevator
has
been balanced.
e.
Add
small
quantities
of
lead
shot
to
the
cup
until the elevator
balances
with the chord
line
level.
Check
this
by
holding
the
spirit
level
aligned
with the marked chord line.
f. The distance
D
must
be
perpendicular
to
the
hinge
line. Measure
D
from
the
hinge
line
to
the
suspension
point
ofthe
cup.
g.
Remove
the
cup,
contents,
and
string,
then
weigh
them.
NOTE
Since
any
weighing
error
is
magnified by
the
distance
D,
weighing
is
most
important
and
must
be
done
carefully
on
scales
that
are
certified
for
accuracy.
h.
Calculate
the
static
balance
as
follows:
1.
The
weight
of
the
cup
and
contents
is
designated by
W.
2.
The
over- or
underbalance
moment
is
designated
by
M.
3.
M=WxD
4.
The
following
is
a
typical
example
of
a
balancing
calculation:
Assume
the elevator
is
underbalance
(tail-
heavy)
and the
paper
cup
was
suspended
from
the horn.
If
the
elevator
balances
with the
chord line
level
at
W
0.95
pound
and D
12.6
inches,
then...
M
0.95
X 12.6
M
12.0
inch-pounds
In
this
instance,
M
is
within
the
required
static balance
range
and
is
therefore
acceptable.
i.
The
complete
elevator
assembly, painted
or
unpainted
including
the
control
arm
and the
tab
control
rod,
must
not
be
tail-heavy
over
a
maximum
moment
(see
ELEVATOR
BALANCING
for
applicable
airplane
serials
and max-
imum
moment).
If
the
static
balance
does
not
comply,
remove
the
elevator
horn
cover
and
add
or
remove
solder
to
bring
the elevator balance
within
required
limits.
NOTE
Coat
the
weight
with
a
corrosion
preventative
material
such
as
zinc
chromate
primer
to
insulate
the
dissimilar
metals.
Replace
the elevator
horn
cover
and
recheck
the
balance.
E16
4-67