The Lockheed F-117 Nighthawk is one of the most innovative designs in the history of aviation and the first mass-produced aircraft with Stealth properties. The concept of an aircraft invisible to radars appeared already during World War II, but it was not until the 1970s that the development of technology made it possible to implement it. In the F-117 it was achieved thanks to the use of many parallel actions. First of all, an unprecedented aerodynamically shape of the plane with a slender pentagonal profile with many flat surfaces with Rudlicki's tail was used. The plane is covered with special RAM (Radar Absorbent Material) materials that "absorb" radar waves. All external elements and the shape of the cabins have been carefully refined, and the active means of detection have also been abandoned.