Human-powered aircraft are flying machines that rely solely on human strength for propulsion. These aircraft are typically lightweight and designed to be efficient, allowing a pilot to generate enough power through pedaling or other means to achieve flight. They often feature large wings to maximize lift and minimize energy expenditure. The development of human-powered aircraft has been a focus for enthusiasts and engineers, leading to various designs and competitions, such as the Gossamer Albatross, which famously crossed the English Channel in 1979. These innovations highlight the potential of human ingenuity in aviation and sustainable transportation.