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SESK: Stuff Everyone Should Know · sesk.info/sport-103-max-speed

At full power in level flight, a powered ultralight may not exceed what speed?

55 knots calibrated airspeed.

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  1. 45 knots
  2. 55 knots ✔
  3. 65 knots

Why: To stay an ultralight, a powered vehicle must not be capable of more than 55 knots calibrated airspeed at full power in level flight. That is about 63 miles per hour.

Huh, didn't know that: Because the test is what the vehicle is capable of, flying slowly does not make a faster machine legal.

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Why did the airplane get sent to its room? It had a bad altitude.
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References

Answer: 55 knots. To stay an ultralight, a powered vehicle must not be capable of more than 55 knots calibrated airspeed at full power in level flight. That is about 63 miles per hour.

  1. 14 CFR Part 103, Ultralight Vehicles (eCFR) www.ecfr.gov/api/renderer/v1/content/enhanced/current/title-14?part=103
    Is not capable of more than 55 knots calibrated airspeed at full power in level flight;
    Checked 2026-10-11.

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