Piper Cherokee Six - Aileron Balance

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
Figure
4-17.
Aileron
Balance
4-35.
BALANCING
AILERONS.
(Refer
to Figure
4-17.)
With
the
hinge
pins
in place,
position
the
aileron
on
the
knife
edge
supports
in
a draft
free
area
and
in a manner
to allow
unrestricted
movement
on the
hinge
pins.
Position
the scale
and
screw
jack approximately
midway
between
the
hinge
points
and as
near
the trailing
edge
as
practical.
Place
the
protractor
on the
upper
surface
of the
control
and
adjust
the
height
of the
screw
jack
as
required
to obtain
an
angle
of
12.10
°
+ .5
°
between
the upper
surface
of the
aileron
and the
horizontal.
Remove
the
protractor
and record
the
scale
reading.
Measure
the
horizontal
distance
between
the centerline
of
hinge
and
point
of contact
of the
screwjack,
"D"
inches.
Determine
the
weight
of
the
screw
jack
and subtract
this
weight
from
the
above
scale
reading
to
obtain
the weight,
"W" of
the aileron.
Multiply
the
weight
"W"
times distance
"D"
to obtain
the
static
balance
in inch-pounds.
If
the static
balance
of the
ailerons
is not
within
the
limits
shown
in
Table
IV-II,
proceed
as
follows:
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
aileron is
too
heavy.
If
the aileron
is
too heavy
because
of painting
over old
paint,
it will
be
necessary
to
strip
all
paint
from
the aileron
and, start
over.
If
the aileron
is too
heavy
resulting
from
repair
to
the
skin or
ribs,
it then
becomes
necessary
to
remove
the repair
and replace
all
damaged
parts.
Normally,
on
the ailerons,
2 to
3 inch-pounds
will
be available
to permit
repainting
(1.00
inch-pound
average)
repairs,
addition
of static
wicks,
etc., however
to be
certain,
check
the balance.
Revised:
12/4/79
STRUCTURE
1G3