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AhaBulb: Stuff Everyone Should Know · ahabulb.com/drone-category-3-25-foot-pounds

What injury threshold, as rigid-object impact energy, applies to Category 3 drones?

25 foot-pounds.

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  1. 11 foot-pounds
  2. 25 foot-pounds ✔
  3. 50 foot-pounds

Why: Category 3 drones must not cause injury equal to or greater than a 25 foot-pound impact from a rigid object. Because they can hit harder, they face tighter limits on where they fly.

Huh, didn't know that: Category 3 drones may fly over people at a closed or restricted-access site where everyone has been told a drone may pass overhead.

The dad joke
Category 3 drones are like big dogs. Friendly, but you keep them out of crowds.
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References

Answer: 25 foot-pounds. Category 3 drones must not cause injury equal to or greater than a 25 foot-pound impact from a rigid object. Because they can hit harder, they face tighter limits on where they fly.

  1. 14 CFR Part 107 Subpart D (eCFR) www.ecfr.gov/current/title-14/chapter-I/subchapter-F/part-107/subpart-D
    a transfer of 25 foot-pounds of kinetic energy upon impact from a rigid object.
    Checked 2026-10-07.

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