What was a significant challenge the Wright Brothers faced in their early flights?

A significant challenge the Wright Brothers faced in their early flights was their insufficient understanding of aerodynamics. This issue was critical because the principles of flight, such as lift, drag, thrust, and weight, were not well-understood or documented at the time. The Wright Brothers had to conduct extensive experimentation and observation to refine their understanding and designs. They built upon existing theories but also contributed significantly to the field of aerodynamics through their trials and errors. By developing a wind tunnel to test different wing shapes and calculating lift and drag, they were able to enhance their aircraft's performance. This foundational work ultimately laid the groundwork for future aviation advancements. Understanding aerodynamics was essential for achieving controlled and sustained flight, which was the ultimate goal of their efforts.