Cessna 172R, Operating Handbook

Page: 34 / 500

SECTION 1
GENERAL
CESSNA
MODEL 172R
WEIGHT AND BALANCE TERMINOLOGY
(Continued)
C.G.
Arm
C.G.
Limits
Standard
Empty
Weight
Center of Gravity Arm is the
arm
obtained by
adding the airplane's
individual
moments
and dividing
the
sum by the total weight.
Center
of Gravity
Limits are the
extreme center
of
gravity locations within which the airplane must
be
operated
at
a
given
weight.
Standard Empty Weight
is the weight of a standard
airplane, including unusable fuel,
full operating fluids
and full engine oil.
Basic Empty Basic Empty
Weight is the standard empty weight
Weight plus the weight of optional equipment.
Useful
Load Useful Load is the difference
between ramp weight
and the basic empty
weight.
MAC
Maximum
Ramp
Weight
MAC (Mean
Aerodynamic Chord) is
the chord
of
an
imaginary rectangular airfoil having the
same pitching
moments
throughout the flight range
as that of the
actual wing.
Maximum Ramp Weight
is the
maximum weight
approved for ground maneuver, and
includes the
weight of fuel used for start,
taxi and runup.
Maximum
Maximum Takeoff Weight is
the maximum weight
Takeoff
approved for the start
of the takeoff roll.
Weight
Maximum
Maximum
Landing Weight is the maximum weight
Landing
approved for
the landing touchdown.
Weight
Tare
Tare is the weight
of chocks, blocks, stands, etc.
used when weighing
an airplane, and is included in
the
scale readings. Tare is deducted from
the scale
reading
to
obtain the actual
(net) airplane weight.
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Revision 7