Improved gliders

The first human-carrying gliders were improved with curved wings, proving superior to flat wings for gliding. This advancement led to the increased popularity of gliding and paved the way for the invention of the airplane.
 Otto Lilienthal Germany 1891 Improved gliders

The first human-carrying gliders were improved with curved wings, proving superior to flat wings for gliding. This advancement led to the increased popularity of gliding and paved the way for the invention of the airplane.