FHHuber - i'm a bit confused by your thread. i don't think the stall speed of the cub probably change since stall speeds are constant at specific flight configurations (i.e., clean, dirty, g-load, etc.) (i think, please correct me if i'm wrong). any plane will appear to land at a very slow ground speed with a strong headwind but the plane's airspeed is still relative. in other words, let's say, hypothetically, that a scale piper cub's stall speed in the dirty configuration (gear down, full flaps, though i don't thing any cub models would have retractables) is 10 mph and it's attempting to land in zero winds. then the pilot, attempting to do a perfect landing, would have the engine at idle, would flare and then touch down , at 10 mph both airspeed and ground speed. now, if there is a 8 mph headwind, then the pilot will still have to do whatever is necessary to keep the airplane flying at 10 mph to avoid a stall before touchdown. that means the pilot would have to either nose the plane approach steep for airspeed, add throttle, or both, to keep the airspeed above 10 mph. but from the ground, if the plane is flying at a 10 mph airspeed, the plane will appear to be flying at only 2 mph (10 - 8 = 2).

i don't know if i addressed the issue you raised. it may be apparent that i'm using this forum to post an over abundance of info., hoping to get as much input and criticism as possible, so that i may be as knowledgable as possible.