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SESK: Stuff Everyone Should Know · sesk.info/sport-103-empty-weight

A powered ultralight under Part 103 must weigh less than how much empty?

254 pounds empty weight.

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  1. 254 pounds ✔
  2. 155 pounds
  3. 400 pounds

Why: Part 103 limits a powered ultralight to under 254 pounds empty weight. Floats and deployable safety devices are not counted. The 155 pound limit is for unpowered ultralights.

Huh, didn't know that: An unpowered ultralight, such as a hang glider, must weigh less than 155 pounds.

The dad joke
Why did the ultralight go on a diet? It wanted to stay under 254 and keep its figure light.
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References

Answer: 254 pounds. Part 103 limits a powered ultralight to under 254 pounds empty weight. Floats and deployable safety devices are not counted. The 155 pound limit is for unpowered ultralights.

  1. 14 CFR Part 103, Ultralight Vehicles (eCFR) www.ecfr.gov/api/renderer/v1/content/enhanced/current/title-14?part=103
    Weighs less than 254 pounds empty weight, excluding floats and safety devices which are intended for deployment
    Checked 2026-10-11.

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