SECTION 6 CESSNA
MODEL 172S WEIGHT & BALANCE / EQUIPMENT LIST
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
Icalculate 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 momentl1000
on
the loading problem.
Use the Loading Graph to determine the momentl1000 for each
additional item to
be
carried; then list these
on
the loading problem.
6-6
Revision 4
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