Under 14 CFR Part 107, what is the maximum groundspeed for a small unmanned aircraft?
Why →
Under 14 CFR § 107.51(b), the maximum groundspeed for a small UAS is 87 knots (100 mph). This applies at all times during flight operations.The trap →
The FAA uses two units (87 knots = 100 mph). "100" looks like a clean round number, so test-takers often choose 100 knots, but that's 115 mph, well above the limit. The magic number is 87 knots.SOURCE → 14 CFR § 107.51(b)CHECKED APR 21ACS I.B.K1EASY