NASA has delayed the first flight of the x-59 silent supersonic aircraft, confirming today (September 17 local time) that the aircraft that broke through the sound barrier could not complete its 2021 launch plan in time. Currently in production and assembly, the x-59 will test a cutting-edge engine and body design that may eventually help solve one of the Concorde’s most serious problems. < / P > < p > this supersonic jet is famous for its ability to reduce flight time from New York to London to a few hours, but it has never achieved the same cross-country speed across the United States. This is because the sonic boom it produces when it breaks through the sound barrier is too large over land, so its maximum performance is limited to over the ocean. < / P > < p > for the x-59, NASA and its partner Lockheed Martin think they can do better. In order to generate supersonic shock waves, the aircraft adopts a unique delta wing design and an ultra long nose design. < / P > < p > recently, the aircraft’s f414-ge-100 turbofan engine was developed specifically for the x-59 by GE aviation. The engine is now connected to the vertical tail and extended nose at Lockheed Martin’s skunk factory in Palmdale, California. However, despite the progress, NASA says it has adjusted the schedule of the entire program. < / P > < p > the x-59 is not expected to make its first flight until the summer of 2022, rather than 2021, as previously said. Major ground tests should start about 12 months in advance to confirm the overall design. The wing of the x-59 will still take time, and NASA hopes to complete the work by the end of this year and then install it on the fuselage. < / P > < p > the current goal of acoustic validation flight is 2023, and it may not be achieved until later in 2024. In the meantime, NASA still has time to adjust its schedule, as it expects to submit the results of the community overflights to the International Civil Aviation Organization and the FAA by 2027. < 4 < air < 4 core= target=_ blank>Didi Qingju bicycle has entered 150 cities