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.