Sail, surfing kite, hang glider and play kite incorporate a trailing edge which is provided with a shaped insert consisting of a stretchable material which allows the trailing edge to deform

摘要

The sail, surf kite, hang glider and play kite incorporate a trailing edge provided with a shaped insert consisting of a stretchable material which allows the trailing edge to deform so that vortex formation after it is reduced. The unstretchable material of the trailing edge can incorporate a closure element such as a zip fastener for a variable degree of use of the stretchable insert.