When calculating CG, what units must be consistent?

When calculating the Center of Gravity (CG), it's essential that the units used for all weights are consistent with each other and that the measurements of distances are also in a compatible unit system. This ensures that the computations for CG are accurate, as the CG is determined by the relationship between the distribution of weight and the distances from a reference point.

For instance, if weights are measured in pounds, the corresponding distances must also be measured in either feet or inches to maintain consistency and properly calculate the moments. If there is a mix of different units (for example, some weights in pounds and others in kilograms, or distances in feet and meters), the calculations can lead to errors and misunderstandings about the aircraft's balance characteristics.

Using consistent units allows for straightforward calculations and understanding of how weight distributions influence the CG position. This principle applies universally, whether in Imperial units or Metric units, as long as both weights and distances adhere to a singular system.