Cessna 172R, Operating Handbook

Page: 182 / 500

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