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handbook

Weight and Balance Handbook

FAA-H-8083-1B Version 2016

Chapter 10

Use of Computer for Weight and Balance Computations

Determining Amount of Ballast Needed to Move CG to a Desired Location

How much ballast must be mounted at station 228 to move the CG to its forward limit of +33? The airplane weighs 1,876 pounds and the CG is at +32.2, a distance of 0.8 inch out of limit.

Use this formula:

Ballast weight = (Aircraft empty weight × distance out of limits) / Distance ballast to desired CG

(1876)(×)(.8)(÷)(195)(=) 7.7

Attaching 7.7 pounds of ballast to the bulkhead at station 228 moves the CG to +33.0.