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Lockheed Martin X-59 Quesst (Quiet SuperSonic Technology), NASA’s Low-Boom Flight Demonstrator program under which an experimental supersonic aircraft was developed at Lockheed Martin’s Skunk Works facilities. The aircraft’s purpose is to test whether commercial supersonic flight over land can be made viable by significantly reducing the sonic boom generated when exceeding the speed of sound. The program’s long-term goal is to provide scientific data to support the lifting of the United States’

North American X-15 is an experimental rocket-powered aircraft used in a hypersonic research program conducted by the United States Air Force and NASA between 1959 and 1968. Three X-15 aircraft were built under the program, completing a total of 199 flights. The aircraft was designed to study aerodynamic and thermal behavior during both atmospheric and exoatmospheric flight.【1】 Development Process Development of the North American X-15 project began in 1954. As demand for spaceflight and hyperso