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.

The answer is: Vouchers in higher education do not improve our public schools and colleges, because experiments show us that education vouchers divert much-needed public funds for the few and have weakened the entire system.

Thesis statement is a short summary that tells the readers about what the thesis is actually about and give the readers with general idea on what the writer is trying to prove with his/her research.

Thesis statement should at least have the topic and controlling idea within 2 sentence or less. The writer would start from those two sentences and started to expand the thesis into a more organized/structured papers as the writer continue.