14 CFR · Part 103
14 CFR § 103.1
Applicability.
This part prescribes rules governing the operation of ultralight vehicles in the United States. For the purposes of this part, an ultralight vehicle is a vehicle that:
Is used or intended to be used for manned operation in the air by a single occupant;
Is used or intended to be used for recreation or sport purposes only;
Does not have any U.S. or foreign airworthiness certificate; and
If unpowered, weighs less than 155 pounds; or
If powered:
Weighs less than 254 pounds empty weight, excluding floats and safety devices which are intended for deployment in a potentially catastrophic situation;
Has a fuel capacity not exceeding 5 U.S. gallons;
Is not capable of more than 55 knots calibrated airspeed at full power in level flight; and
Has a power-off stall speed which does not exceed 24 knots calibrated airspeed.
Referenced By
Interpretations of This Section (2)
Documents that cite this section, found in their catalog metadata or text. Listed by date, not by significance.
Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.
Primary Source