Airplane Performance And Weight Terminology - Sirius Satellite Radio TL-3000 Pilot Operating Handbook

Pilot Operating Handbook
TL3000
Sirius
Notice! The information contained in this document is for reference and information only.
The pilot is the final and only responsible authority for the safe operation of this aircraft.

AIRPLANE PERFORMANCE AND WEIGHT TERMINOLOGY

Arm: The horizontal distance expressed in inches from the reference datum plane
to the center of gravity (CG) of an item or location.
Units of measurements and weights must be consistent for each set
of calculations and in the same system of units, i.e., pounds and
inches, or kilograms and centimeters.
Ballast: A specific amount of weight attached in a specific location, which can be
temporarily or permanently installed in an aircraft, to help bring its CG within the
required limits. If temporary ballast must be used for certain operations, the exact
amount and its location must be placarded on the instrument panel within clear view
of the pilot. The use of Ballast increases Empty Weight and reduces Useful Load.
Basic Empty Weight: The standard empty weight plus the weight of any
additionally installed or optional equipment.
Empty Weight Center of Gravity: The CG of an aircraft in its basic empty weight
condition, and is an essential part of the weight and balance record.
Brake Horsepower: The power developed by the engine expressed in
horsepower and measured by an instrument resistant (brake) device.
Center of Gravity (CG): A point along an aircraft's longitudinal axis at which all the
loads and forces are perfectly concentrated and balanced. It is computed by
dividing the total moment by the total weight of the airplane. Its distance from the
reference datum is found by dividing the total moment by the total weight of the
airplane.
(Total Moment / Total Weight = Center of Gravity)
Center of Gravity Arm
the airplane's individual moments and dividing the sum by the total weight.
Center of Gravity Limits are the extreme forward and aft CG locations (limits)
within which the airplane must be operated at any given weight.
1 Feb 11 – Ch 4
Copyright © 2011
NOTE
: T
he arm (distance) from data plane obtained by adding
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Section 1
General Information
1-13