Raytheon Beech Baron E55 - Page 274

Ray~hean
Aircraft
BEECH
BARON
55
AND
58
SHOP
MANUAL
e.
Hold
a
spirit
level
against
the
marked
chord
line and level it
by
extending
or
contracting
the
spindle,
or
by
using
blocks
and shims
under
the
spindle.
f.
Measure
the
perpendicular
distance
from
the
hinge
centerline
to
the
point
supported
by
the
spindle.
g.
Ensure
that
the
spirit
level
and
rule
are
removed
from the
surface
and
read the
reaction
on
the
beam
balance.
h.
Calculate
the static
underbalance
moment
M from
the
formula:
M
D
(R-T) inch-pounds
where,
D
Perpendicular
distance
from
the
hinge
centerline
to
the
spindle
point
(inches).
R
Reaction
(pounds)
read
from
the beam balance.
T
Tare, i.e.,
spindle
plus
leveling
blocks
or
shims
on
the
scale
platform
(pounds).
EXAMPLE
D
is
13.5
inches,
R is 1.89
Ib.
and
T
=1.00
Ib.
M
13.5
(1.89
-1.00);
M
12.0
inch-pounds.
M is
within the
range
which
is
satisfactory.
If M is
not
within the
prescribed
range,
refer
to
step
i.
under
BALANCING
PROCEDURE
COUNTERBALANCING
M ETHOD.
I
COUNTERBALANCING METHOD
CHECK
BALANCE
BY
COUNTERBALANCING
I
The
equipment required
to
perform
the
check
balance
by
counterbalancing
is
a
follows:
a.
A
stand
with
knife-edge
supports
as
illustrated
in
Figure
4-26.
The
knife-edges
must
be
in
the
same
horizontal
plane.
b.
A
paper
cup
or
similar
lightweight
container.
c.
Approximately
2
pounds
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.
BALANCING
PROCEDURE
COUNTERBALANCING
METHOD
a.
Locate
the chord line
by
placing
a
straightedge
at
the
inboard
end
of the
elevator
assembly
so
that
one
end
is
on
the
hinge
centerline
and
the
other
end
is
centered
on
the
trailing
edge.
Mark
the
chord
line
with
a
suitable
marker,
such
as a
grease
pencil,
then
remove
the
straightedge.
b.
Secure
the trim tab in its
neutral
position
with
a
small
piece
of
masking tape.
c.
Fit the
correct
size bolts
in
the
hinge
devises
and
mount
the
elevator
on
the
knife-edge
supports.
Ascertain
that
the
elevator
is free
to
rotate
about
the
hinge
line.
4-66
E16