Cirrus Design Section 1
SR22T General
P/N 13772-005 1-13P/N 13772-005 1-13
Arm Arm is the horizontal distance from the reference
datum to the center of gravity (CG) of an item. The
airplane’s arm is obtained by adding the airplane’s
individual moments and dividing the sum by the total
weight.
Moment Moment is the product of the weight of an item
multiplied by its arm.
Standard
Empty Weight
Standard Empty Weight is the weight of a standard
airplane including unusable fuel, full operating
fluids, and full oil
Basic Empty
Weight
Basic Empty Weight is the actual weight of the
airplane including all operating equipment that has a
fixed location in the airplane. The basic empty
weight includes the weight of unusable fuel and full
oil.
Maximum
Ramp Weight
Maximum Ramp Weight is the maximum weight
approved for ground maneuver and includes the
weight of the fuel used for startup, taxi, and run-up.
Maximum
Gross Weight
Maximum Gross Weight is the maximum
permissible weight of the airplane and its contents
as listed in the aircraft specifications.
Maximum
Zero Fuel
Weight
Maximum Zero Fuel Weight is the maximum
permissible weight of the airplane and its contents
minus the total weight of the fuel onboard.
Useful Load Useful Load is the basic empty weight subtracted
from the maximum ramp weight. It is the maximum
allowable combined weight of pilot, passengers, fuel
and baggage.
MAC Mean Aerodynamic Chord is the chord drawn
through the centroid of the wing plan area.
LEMAC Leading Edge of Mean Aerodynamic Chord is the
forward edge of MAC given in inches aft of the
reference datum (fuselage station).
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