Given an empty weight of 1,271 lb, how is the CG determined if the total load includes pilot and copilot, a rear seat passenger, cargo, and fuel?

Determining the center of gravity (CG) for an aircraft involves calculating the CG based on the total weight and the distribution of that weight within the aircraft's designated weight limits. The correct answer indicates that the CG must be “within the CG envelope,” which refers to a specific range established for safe and efficient flight operations.

The CG envelope is crucial because it represents the limits within which the aircraft can operate safely without jeopardizing stability and control. When the total load, which consists of occupants (pilot, copilot, and passenger), cargo, and fuel, is added, it's vital that their collective weight is positioned such that the CG falls within this predetermined envelope.

Each seat and cargo area has a specific moment arm that contributes to the overall CG calculation. By ensuring that the CG remains within the envelope, the aircraft will be able to maintain favorable flying characteristics, such as proper pitch and roll stability. If the CG were to fall outside this envelope, it could lead to handling difficulties, reduced performance, or even unsafe flight conditions.

In summary, having the CG remain within the envelope is essential for safe aircraft performance, confirming that the weight and balance have been calculated accurately based on the load involved.