Which unit is used to express the CG location in the example?

Which unit is used to express the CG location in the example?

• A. Inches
• B. Feet
• C. Meters
• D. Centimeters

Answer: (A)

CG location is the balance point along the airplane’s length, measured as a distance from a fixed reference point (the datum). In the example, that distance is given in inches because inches are the standard unit for arm measurements in weight-and-balance calculations. Using inches keeps the numbers precise and aligns with how moments are computed (weight times arm) and how CG envelopes are specified. Feet would be too coarse for the tiny variations that matter in balancing, and meters or centimeters aren’t the usual practice in this context. So expressing the CG location in inches matches the common method and makes the calculations straightforward.

CG location is the balance point along the airplane’s length, measured as a distance from a fixed reference point (the datum). In the example, that distance is given in inches because inches are the standard unit for arm measurements in weight-and-balance calculations. Using inches keeps the numbers precise and aligns with how moments are computed (weight times arm) and how CG envelopes are specified. Feet would be too coarse for the tiny variations that matter in balancing, and meters or centimeters aren’t the usual practice in this context. So expressing the CG location in inches matches the common method and makes the calculations straightforward.