The Junkers F 13 is a pioneering all-metal monoplane designed by Hugo Junkers in the early 1910s. It first flew in 1919 and is recognized as one of the world's first commercial aircraft. The F 13 was notable for its innovative design, featuring a cantilever wing structure and a spacious cabin that could accommodate passengers and cargo. With a maximum speed of around 120 km/h (75 mph), the F 13 was used primarily for short-haul flights. Its reliability and performance made it popular among early airlines, contributing to the growth of commercial aviation in the post-World War I era.