SECTION 1 CESSNA
GENERAL MODEL 172R
WEIGHT AND BALANCE TERMINOLOGY (Continued)
C.G. Center of Gravity Arm is the arm obtained by
Arm adding the airplane's individual moments and dividing
the sum by the total weight.
C.G. Center of Gravity Limits are the extreme center of
Limits gravity locations within which the airplane must be
operated at a given weight.
Standard Standard Empty Weight is the weight of a standard
Empty airplane, including unusable fuel, full operating fluids
Weight 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 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 Maximum Ramp Weight is the maximum weight
Ramp approved for ground maneuver, and includes the
Weight 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.
I
1-12 Revision 7
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