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What is the result of operating a UAS that exceeds its maximum weight?

  1. Increased altitude

  2. Decreased endurance

  3. Improved performance

  4. Increased stability

The correct answer is: Decreased endurance

Operating a Unmanned Aircraft System (UAS) above its maximum weight limits can significantly reduce its endurance. Endurance refers to the length of time the UAS can remain airborne before needing to land, and exceeding the maximum weight can negatively impact this duration in a couple of ways. When a UAS is heavier than its designed weight, the additional load impacts the power-to-weight ratio, meaning the motors must work harder to generate enough lift to keep the aircraft in the air. This increased demand on the motors consumes more battery power more quickly, leading to a reduced time of flight. Furthermore, the increased weight could lead to sluggish performance in maneuvers, making it harder to maintain optimal flight efficiency. In contrast, other options such as increased altitude, improved performance, and increased stability would not typically result from exceeding the maximum weight. These factors often require the UAS to operate within its specified weight limits to function effectively and safely.