Who invented the wind tunnel?

The concept of the wind tunnel was developed by multiple inventors, but one of the key figures credited with its invention is Sir George Cayley in the early 19th century. He created one of the first wind tunnels for testing small models of aircraft. Later, in the 20th century, notable advancements were made by scientists like Frederick W. Lanchester and others who refined the design and application of wind tunnels for aerodynamic research.