It is the speed below which the airplane cannot create enough lift to sustain the weight in 1g flight.
A change too small to be seen by the naked eye can make any surface -create lift or drag.
Concaves create lift and make the wakeboard sit higher in the water.
The air is pushed up the windward face of the mountain, creating lift.
Some types use a separate power system to create lift.
The spinning creates lift, and the toy flies when released.
Most discs are designed to create lift when thrown with the flat side up.
The airplane requires a relative wind moving over the wing to create lift.
The key to creating lift with an aircraft wing is relative wind.
Flapping keeps the air current moving to create lift and also moves the bird forward.