Engineers-Aeronautical is a subdivision of the Engineering Services industry that specializes in the design, development, and testing of aircraft and spacecraft. Aeronautical engineers use their knowledge of physics, materials science, and aerodynamics to create safe and efficient flying machines. They work on a range of projects, from designing small drones to developing commercial airliners and military aircraft. Aeronautical engineers are responsible for ensuring that aircraft are structurally sound, aerodynamically stable, and fuel-efficient. They also work on developing new technologies to improve aircraft performance and safety.