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Effect of weight on battery consumption

Adding a heavier payload to an sUAS will most directly cause which effect?

  • A.Slower battery drain because the motors run more efficiently
  • B.Faster battery consumption and shorter flight endurance
  • C.No change in flight time if the center of gravity stays centered
Correct answer

B. Faster battery consumption and shorter flight endurance

Why

Heavier aircraft require more lift, which for a multirotor means more motor power for every second of flight. Higher power draw empties the battery sooner and reduces endurance.

Source: FAA-G-8082-22 Ch. 4 · ACS knowledge area: sUAS Loading and Performance · From the Loading, Performance & Airport Operations practice bank (PER-002).

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