Piper Cherokee Six - Page 148

*PIPER CHEROKEE
SIX SERVICE
MANUAL
4-36.
BALANCING RUDDER.
(Refer to
Figure'4-5) Prior
to balancing the rudder,
be
sure that the assembly is complete,
including the tip assembly, position light
and wiring, and
all attaching screws.
Place
the complete
assembly
on the knife
edge supports
in a horizontal
position
and check
the
freedom of
movement.
Place a platform
scale and
screw jack
midway between
the hinge
points
and as far aft
as possible.
Place the
protractor
on the top surface
of the
rudder
perpendicular
to the
hinge line and
adjust the
height of the
screwjack as
required to
position
the upper surface
at an angle
of 8.10+
.5 . Remove
the protractor
and record
the scale reading.
Measure the horizontal distance between
the hinge line and the screwjack contact
point "D" in.
inches.
Determine the weight
of the screw jack
and subtract the
weight from the above
scale
reading to obtain
the weight "W"
of the rudder. Multiply
the weight "W"
of the rudder times
the
distance "D"
to obtain
the static balance
in inch-pounds.
This
value shall
be within the
limits given in Table IV-II. If
the static balance of the rudder is not
within the limits shown, use
the following procedures:
a. Nose Heavy:
This condition
is highly improbable;
recheck
measurements and
calculations.
b. Nose Light: In this case,
the mass balance weight is too
light, or the rudder too
heavy. If the
rudder is too heavy
because of painting,
it will be necessary
to strip the paint
and start over.
If the rudder is too
heavy as a result
of repairs, the repair
must be removed
and the damaged
parts
replaced.
THIS SPACE INTENTIONALLY LEFT BLANK
I
Revised:
12/4/79
STRUCTURE
1G4