When Leonardo DA Vince draw the first airplane?

Leonardo da vinci conceptualized designs for flying machines in the late 15th century, particularly between 1485 and 1490. His sketches, including the famous "flying machine" resembling a modern helicopter and an ornithopter, demonstrated his keen interest in flight and his understanding of aerodynamics. While he never built a working airplane, his innovative ideas laid the groundwork for future aviation breakthroughs.