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Virus SW 121
Pilot Operating Handbook
POH-121-00-40-001
PAGE REV. 0
SECTION 1
GENERAL
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
aft of the reference datum.
-
Maximum Gross Weight is the maximum permissible weight of the
airplane and its contents as listed in the aircraft speciļ¬cations.
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Moment is the product of the items weight multiplied by its arm.
-
Useful Load is the basic empty weight subtracted from the maximum
weight of the aircraft. It is the maximum allowable combined weight of
pilot, passengers, fuel and baggage.
-
Reference Datum is an imaginary vertical plane from which all horizon-
tal distances are measured for balance purposes.
-
Tare is the weight of all items used to hold the airplane on the scales for
weighing. Tare includes blocks, shims, and chocks. Tare weight must be
subtracted from the associated scale reading.
MLE
Minimum List of Equipment is a list of equipment that must be installed
and operable for the aircraft to be considered airworthy for a certain kind
of operation.
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General