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After MOSAIC, what is the maximum VS1 stall speed of an airplane a sport pilot may fly?

59 knots CAS.

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  1. 59 knots CAS ✔
  2. 45 knots CAS
  3. 87 knots CAS

Why: Section 61.316 sets 59 knots CAS VS1 for airplanes a sport pilot may fly. Other aircraft such as gliders and weight-shift trikes use 45 knots. The old rule was based on the light-sport aircraft definition.

Huh, didn't know that: Sport pilot endorsements are also tied to an aircraft's VH, with 87 knots CAS as the dividing line.

The dad joke
Why did the sport pilot love his stall speed? It was the only thing he wanted to keep low.
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References

Answer: 59 knots CAS. Section 61.316 sets 59 knots CAS VS1 for airplanes a sport pilot may fly. Other aircraft such as gliders and weight-shift trikes use 45 knots. The old rule was based on the light-sport aircraft definition.

  1. 14 CFR Part 61 Subpart J, 61.316 (eCFR) www.ecfr.gov/api/renderer/v1/content/enhanced/current/title-14?part=61&subpart=J
    59 knots CAS at the aircraft's maximum certificated takeoff weight and most critical center of gravity
    Checked 2026-10-11.
  2. FAA MOSAIC Final Rule Fact Sheet www.faa.gov/newsroom/fact_sheets/MOSAIC_Fact_Sheet.pdf
    New VS1 maximum stalling speed (flaps retracted) of 59 knots CAS.
    Checked 2026-10-11.

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