![]() By using inertial guidance, infrared sensors, digital maps, and radio commands from satellites or other aircraft, the F-117 could navigate without emitting its own telltale radar signals. Weaponry, consisting of laser-guided bombs or radar-seeking or infrared-seeking missiles, was carried internally. Power was supplied by two General Electric turbofan jet engines, which, having no afterburners, limited the aircraft to subsonic speeds but reduced its infrared emissions. Radar reflection was further reduced by surface coatings of radar-absorbing material. As developed by Lockheed’s Advanced Development Projects division (known as the “Skunk Works” for its top-secret work on such aircraft as the U-2 and SR-71 spy planes), the F-117 had a triangular outline, wings swept sharply back from the nose at a 67° angle, and a surface composed of many flat planes oriented in such a manner as to reflect radar waves away from their transmitter. Department of Defense for a military aircraft that would emit or reflect so little radio, infrared, or light energy that it could slip undetected through an enemy’s electronic warning system. The F-117 had its origins in a request made in 1974 by the Defense Advanced Research Projects Agency (DARPA) of the U.S. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! ![]() Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.The upgrade added a new flight management system, new cockpit instrumentation with. This Time in History In these videos, find out what happened this month (or any month!) in history. The object was to increase combat effectiveness by reducing cockpit workload.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.
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