Fixed-wing aircraft are limited by their stall speed, the slowest airspeed at which they can maintain level flight.
The MacCready Gossamer Condor is a human-powered aircraft capable of flight as slow as 8 miles per hour (13 km/h).
The Zenith STOL CH 701 and ICP Savannah both have stall speeds of 48 kilometres per hour (30 mph).
It is a 3/4 scale replica of the Fieseler Fi 156 Storch, which had a stall speed of 50 kilometres per hour (31 mph).
As reported in many personal accounts by the pilots in their memoirs, the speed at which the aircraft would actually stall was 24 miles per hour (39 km/h).