After including the potable water and hydraulic fluids, the center of gravity of the aircraft is located at approximately how many inches from the datum?

• A. 150.713 inches
• B. 151.365 inches
• C. 150.000 inches
• D. 149.500 inches

Answer: (A)

Center of gravity is found by dividing the total moment about the datum by the total weight. When you include potable water and hydraulic fluids, you add their weight at specific locations (their arms), which shifts the overall moment and thus moves the CG toward where those fluids are stored.

The value 150.713 inches means the combined weight of the fluids sits at an arm that pulls the CG slightly aft of the 150-inch reference station. It’s between 150 and 151 inches, reflecting that aft shift caused by those added weights. If there were no shift, you’d expect about 150.000 inches; if the fluids were forward of the 150-inch station, the CG would move forward (toward 149.5 in the options). The chosen figure is the one that matches the calculated balance with the fluids included, given their location and weights.