An unmanned aircraft carrying excessive weight will experience which of the following?

When an unmanned aircraft carries excessive weight, it is inherently more difficult for the aircraft to manage its flight dynamics. This additional weight leads to a number of performance issues; foremost among these is reduced maneuverability.

Excess weight increases the aircraft's stall speed, which means it must maintain a higher airspeed to fly steadily. This can limit the aircraft's responsiveness to control inputs, making quick turns or altitude changes more difficult. Additionally, the extra weight can affect the stability of the flight, leading to a decreased ability to respond to environmental changes such as turbulence or wind gusts.

Furthermore, the aircraft may struggle to perform essential maneuvers, particularly in emergency situations or when navigating tight spaces. Therefore, while the other options imply possible benefits (such as increased speed, range, or altitude), in reality, excessive weight detrimentally impacts the aircraft's overall maneuverability, making it less agile and less capable of effectively handling various flight scenarios.