New submitter john of sparta shares a report from Space.com: Nasa has taken a huge leap forward in its quest to create an aircraft that can travel faster than the speed of sound without causing the ear-splitting sonic boom. The space agency announced today (April 2) that it has awarded the aerospace company Lockheed Martin a $247.5 million contract to design and build a new X-plane, known as the Low-Boom Flight Demonstrator (LBFD), which may soar silently over the U.S. by 2022. Lockheed Martin's LBFD won't be built for transporting people. Before any supersonic planes will be allowed to fly over land, NASA and Lockheed Martin must prove that it's possible to break the sound barrier without the sonic boom. Jaiwon Shin, associate administrator of NASA's Aeronautics Research Mission Directorate, said that the LBFD will fly over select U.S. cities starting in mid-2022 and NASA will "ask the people living and working in those communities to tell us what they heard, if anything." The LBFD aircraft will be 94 feet (29 meters) long, or about the size of a small business jet. It will fly at a cruising altitude of about 55,000 feet (17,000 meters) and reach a speed of 1.4 times the speed of sound (about 1,000 mph, or 1,600 km/h). This will "create a sound about as loud as a car door closing," NASA officials said in the news conference.
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