Textron Cessna 172R - WEIGHT AND BALANCE

SECTION
6
WEIGHT
&
BALANCE
/
EQUIPMENT
LIST
CESSNA
MODEL
172R
3.
Weighing:
a.
Weigh
airplane
in
a
closed
hangar
to
avoid
errors
caused
by
air
currents.
b.
With
the
airplane
level and
brakes
released,
record the
weight
shown
on
each
scale.
Deduct
the
tare,
if
any,
from
each
reading.
4.
Measuring:
a.
Obtain
measurement
A
by measuring horizontally
(along
the
airplane
centerline)
from
a
line
stretched
between the
main wheel
centers to
a
plumb
bob
dropped
from
the
firewall.
b.
Obtain
measurement
B
by measuring
horizontally
and
parallel
to
the
airplane
centerline,
from
center
of
nose
wheel
axle,
left
side,
to
a
plumb
bob
dropped
from
the line
between the main wheel
centers.
Repeat
on
right
side
and
average
the
measurements.
5.
Using weights
from
item
3
and
measurements
from
item
4,
the
airplane
weight
and
C.G.
can
be
determined.
6.
Basic
Empty Weight
may
be
determined
by
completing
Figure
6-1.
WEIGHT
AND
BALANCE
The
following
information
will
enable
you
to
operate
your
Cessna
within
the
prescribed
weight
and
center
of
gravity
limitations.
To
|
calculate
weight
and
balance,
use
the
Sample
Loading
Problem,
Loading
Graph,
and
Center of
Gravity
Moment
Envelope
as
follows:
Take the
basic
empty
weight
and
moment
from
appropriate
weight
and balance records
carried
in
your
airplane,
and
enter
them
in
the
column
titled
YOUR
AIRPLANE
on
the
Sample
Loading
Problem.
NOTE
In
addition
to
the
basic
empty
weight
and
moment
noted
on
these
records,
the
C.G.
arm
(fuselage
station)
is
also
shown,
but need
not
be
used
on
the
Sample
Loading
Problem. The
moment
which is shown
must
be
divided
by
1000
and this
value used
as
the
moment/1000
on
the
loading
problem.
Use the
Loading
Graph
to
determine
the
moment/1000
for
each
additional item
to
be
carried;
then
list these
on
the
loading
problem.
6-6
Revision
7
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