In WW II, Feisler built a plane, the Storch, that looked very much like our Piper Cubs.
Difference was they had installed leading edge slats, flaps all over the wing and a type of flap, a Foweler ?, that extends the wing flap rearward and also downward to improve the stall speed so low that the plane could hold altitude in a moderate breeze and also land going backwards.
Were they the genius of all times in sloww speed or what ?