How long did it take to make the hot air balloon?

The development of the hot air balloon began with the Montgolfier brothers in France, who conducted their first successful flight in 1783. They took just a few months to create their initial working model, which involved experimenting with different materials and designs. Since then, advancements in technology have continually refined hot air balloon construction, but the fundamental principles remain rooted in the original designs from the 18th century.