What does the moment represent in weight and balance calculations?

What does the moment represent in weight and balance calculations?

• A. Weight times arm
• B. Weight
• C. Distance from datum
• D. Load factor

Answer: (A)

In weight and balance, the moment represents the turning effect a weight has about the reference datum. It is found by multiplying the weight by its arm—the distance from the datum to where the weight acts. This product, weight times arm, quantifies how strongly that weight tends to rotate the airplane around the datum. Moments from all items are summed, and the center of gravity is determined by dividing the total moments by the total weight. If you only used weight, you’d miss how far from the datum the weight acts; if you used distance alone, you’d miss how heavy the weight is. The load factor is related to how loads change with flight conditions, not the moment itself. So the moment is weight times arm.

In weight and balance, the moment represents the turning effect a weight has about the reference datum. It is found by multiplying the weight by its arm—the distance from the datum to where the weight acts. This product, weight times arm, quantifies how strongly that weight tends to rotate the airplane around the datum. Moments from all items are summed, and the center of gravity is determined by dividing the total moments by the total weight. If you only used weight, you’d miss how far from the datum the weight acts; if you used distance alone, you’d miss how heavy the weight is. The load factor is related to how loads change with flight conditions, not the moment itself. So the moment is weight times arm.