In the early 1900s many inventors were trying to become the first to fly.
Two brothers succeeded but not without a lot of trial and error. The Wright
Brothers faced many problems on the road to the first successful flight in an
airplane in 1903.
One problem was to design a wing that would lift the plane and
control the side-to-side and forward motion as the plane flew. To solve this
problem, they built a wind tunnel to test different wing shapes and how they
performed. As a result of these tesis, they were able to design better wings for
better gliders and planes. Their scientific method of
analyzing problems and testing solutions paid off. Orville and Wilbur Wright
are famous for their contributions to aviation.

What is the Text Structures?