With the wide acceptance of winglets in new sailplane designs of the 1990s, designers sought to further optimize the aerodynamic performance of their wingtip designs.
It was discovered that the untested wingtip fuel tanks contributed to wing structural failures by inducing excessive twisting during high- g maneuvers.
A shoe with a wingtip-style toecap but no perforations is known as an austerity brogue, while a plain-toe shoe with wingtip-style perforations is a blind brogue.
