What was one challenge with the engine used on the Flyer?

The engine used on the Flyer presented a significant challenge primarily due to its weight, which adversely affected the aircraft's performance and limited its flight duration. The Wright brothers were working with the technology available at the time, and their engine design was relatively powerful but also heavy. This weight was a critical factor because the Flyer needed to be as light as possible to achieve sustained flight. As a result, the additional mass contributed to reduced flight times and limited the aircraft's ability to take off and climb efficiently.

While the Flyer faced other issues related to engine performance and reliability, the weight of the engine had a direct impact on the overall capability of the aircraft, which made addressing this challenge imperative for future aviation advancements.