What was the first tool of aeronautics to be developed? by whom was it developed?

Using of systematic techniques became gradually important in the progress of flight, it also became clear to aircraft inventors that testing their theories with human subjects was too perilous. Wind tunnels were the primary, original, and first tool of aeronautics to be developed. Inventors built models of their planes and placed them in tunnels through which air could be blown to reproduce flight. While wind tunnels did bring valued data and evidence that positively safer than human flight. The Wright Brothers used their studies, investigations, and theories of the principles of flight by stimulating the use of the wind tunnel.

The Wind Tunnel was the first tool to be developed by Francis Herbert Wenham in 1871.Explanation:

The wind tunnel is an instrument that is used to measure the effect of wind force on objects that are placed inside it. A number of fans are used inside a closed tubular structure to generate the wind speed that then collides with the object that is placed inside. This force; its magnitude, direction, and angle are then measured via the use of multiple sensors.