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Shaped Sonic Boom Demonstration
The NASA Shaped Sonic Boom Demonstration, also known as the Shaped Sonic Boom Experiment, was a two-year program that used a Northrop F-5E with a modified fuselage to demonstrate that the aircraft's shock wave, and accompanying sonic boom, can be shaped, and thereby reduced. The program was a joint effort between NASA's Langley Research Center, Dryden Flight Research Center at Edwards Air Force Base, California and Northrop Grumman. The program became, at that time (2003), the most extensive study on the sonic boom. After measuring the 1,300 recordings, some taken inside the shock wave by a chase plane, the SSBD demonstrated a reduction in boom by about one-third. Several of the flights included NASA Dryden's F-15 Eagle, F-15B research testbed aircraft following to measure the F-5E's shock wave signature close-up. During the flights, many shock wave patterns were measured by the F-15B at various distances and orientations from the F-5E. An unmodified F-5E flew a few seconds behi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
F-5E Shaped Sonic Boom Demonstration Aircraft
The Northrop F-5 is a family of supersonic light fighter aircraft initially designed as a privately funded project in the late 1950s by Northrop Corporation. There are two main models: the original F-5A and F-5B Freedom Fighter variants, and the extensively updated F-5E and F-5F Tiger II variants. The design team wrapped a small, highly aerodynamic fighter around two compact and high-thrust General Electric J85 engines, focusing on performance and a low cost of maintenance. Smaller and simpler than contemporaries such as the McDonnell Douglas F-4 Phantom II, the F-5 costs less to procure and operate, making it a popular export aircraft. Though primarily designed for a day air superiority role, the aircraft is also a capable ground-attack platform. The F-5A entered service in the early 1960s. During the Cold War, over 800 were produced through 1972 for US allies. Despite the United States Air Force (USAF) not needing a light fighter at the time, it did procure approximat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Titusville, Florida
Titusville is a city in and the county seat of Brevard County, Florida, United States. As of the 2020 United States census, 2020 census, the population of the city was 48,789, up from 43,761 at the 2010 census. Titusville is located along the Indian River (Florida), Indian River, west of Merritt Island, Florida, Merritt Island and the Kennedy Space Center, and south-southwest of the Canaveral National Seashore. It is a principal city of the Palm Bay, Florida, Palm Bay–Melbourne, Florida, Melbourne–Titusville, Palm Bay-Melbourne-Titusville, Florida Metropolitan Statistical Area, Florida Metropolitan Statistical Area. A secondary, ''de facto'' county seat was established beginning in 1989, at Viera, Florida, in the geographic center of the county, to better serve the more populous southern portion of the county. History Indigenous peoples had inhabited this area for thousands of years, as shown by discovery in 1982 of the Windover Archeological Site, dating to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DARPA
The Defense Advanced Research Projects Agency (DARPA) is a research and development agency of the United States Department of Defense responsible for the development of emerging technologies for use by the military. Originally known as the Advanced Research Projects Agency (ARPA), the agency was created on February 7, 1958, by President Dwight D. Eisenhower in response to the Soviet Union, Soviet launching of Sputnik 1 in 1957. By collaborating with academia, industry, and government partners, DARPA formulates and executes research and development projects to expand the frontiers of technology and science, often beyond immediate U.S. military requirements.Dwight D. Eisenhower and Science & Technology, (2008). Dwight D. Eisenhower Memorial CommissionSource The name of the organization first changed from its founding name, ARPA, to DARPA, in March 1972, changing back to ARPA in February 1993, then reverted to DARPA in March 1996. ''The Economist'' has called DARPA "the agency that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA Programs
This is a list of NASA missions, both Human spaceflight, crewed and Robotic spacecraft, robotic, Creation of NASA, since the establishment of NASA in 1957. There are over 80 currently active science missions. X-Plane program Since 1945, NACA (NASA's predecessor) and, since January 26, 1958, NASA has conducted the X-Plane Program. The program was originally intended to create a family of experimental aircraft not intended for production beyond the limited number of each design built solely for flight research. The first X-Plane, the Bell X-1, was the first rocket-powered airplane to break the sound barrier on October 14, 1947. X-Planes have set numerous milestones since then, both crewed and unpiloted. Human spaceflight NASA has successfully launched over 200 crewed flights. Three have ended in failure, causing the death of the entire crew: Apollo 1 (which never launched) in 1967 lost three crew members, STS-51-L (Space Shuttle Challenger disaster, the ''Challenger'' disa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eagle Aeronautics
Eagle is the common name for the golden eagle, bald eagle, and other birds of prey in the family of the Accipitridae. Eagles belong to several groups of genera, some of which are closely related. True eagles comprise the genus '' Aquila''. Most of the 68 species of eagles are from Eurasia and Africa. Outside this area, just 14 species can be found—two in North America, nine in Central and South America, and three in Australia. Eagles are not a natural group but denote essentially any kind of bird of prey large enough to hunt sizeable (about 50 cm long or more overall) vertebrates. Etymology The word "eagle" is borrowed into English from and , both derived ultimately from ("eagle"). It is cognate with terms such as , and . It is broadly synonymous with the less common English term "erne" or "earn", deriving from , from , in which it acts as the usual word for the bird. The Old English term is turn derived from and is cognate with other synonymous words in Germanic la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Institute Of Aeronautics And Astronautics
The American Institute of Aeronautics and Astronautics (AIAA) is a professional society for the field of aerospace engineering Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecraft. It has two major and overlapping branches: aeronautical engineering and astronautical engineering. Avionics engineering is s .... The AIAA is the U.S. representative on the International Astronautical Federation and the International Council of the Aeronautical Sciences. In 2015, it had more than 30,000 members among aerospace professionals worldwide (a majority are American or live in the United States). History The AIAA was founded in 1963 from the merger of two earlier societies: the American Rocket Society (ARS), founded in 1930 as the American Interplanetary Society (AIS), and the Institute of the Aerospace Sciences (IAS), founded in 1932 as the Institute of the Aeronautical Sciences. Paul Johnston was the first executive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imaginova
Imaginova Corporation is a U.S. digital commerce company based in Watsonville, California. The company, which was started in 1999 as "Space.com" by CNN business anchor Lou Dobbs, later became known as Space Holdings Corp. Dan Stone became president, chief executive officer and a board member in 2002 and renamed the company to Imaginova in 2004. The company sold its consumer businesses to TechMediaNetwork, formally TopTenReviews, in 2009. ''Imaginova'' promotes itself as the preeminent destination for the “intellectually curious.” It comprises the following E-Commerce retailer: space * LiveScienceStore.com LiveScienceStore.com ''Imaginova'' previously owned Orion Telescopes & Binoculars until Orion was repurchased by its employees in November 2017. ''Imaginova'' previously owned SpaceNews until it was sold to Pocket Ventures, LLC. in 2012. ''Imaginova'' is a news provider, via the Imaginova Network of media properties, and syndicates its original content to the followi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Space
Space is a three-dimensional continuum containing positions and directions. In classical physics, physical space is often conceived in three linear dimensions. Modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as '' spacetime''. The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework. In the 19th and 20th centuries mathematicians began to examine geometries that are non-Euclidean, in which space is conceived as '' curved'', rather than '' flat'', as in the Euclidean space. According to Albert Einstein's theory of general relativity, space around gravitational fields deviates from Euclidean space. Experimental tests of general relativity have confirmed that non-Euclidean geometries provide a bet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulfstream X-54
The Gulfstream X-54 is a proposed research and demonstration aircraft, under development in the United States by Gulfstream Aerospace for NASA, that is planned for use in sonic boom and supersonic transport research. Design Initiated during 2008, the X-54 project is intended to produce an experimental aircraft capable of supersonic speeds with a formed sonic boom that is acoustically shaped to mitigate noise pollution.Jane's 2010. The X-54A is intended to demonstrate low-boom sonic effects in population impact studies in support of future supersonic transport design and regulation. Current regulations prohibit supersonic flight over land areas in the United States; the X-54 is part of NASA's efforts to have the regulations altered to allow for supersonic transports to be commercially viable. NASA's X-54 project is intended to continue the research objectives of the DARPA Quiet Supersonic Aircraft, and is intended to demonstrate low-boom technologies and methods validated by pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quiet Spike
Quiet Spike was a collaborative program between Gulfstream Aerospace and NASA's Dryden Flight Research Center to investigate the suppression of sonic booms. The patent was published with the United States Patent and Trademark Office in 2004 and is owned by Gulfstream Aerospace. History The program was intended to develop technology that may allow next generation supersonic transports to overfly populated areas at above Mach 1 ( the speed of sound) without the high intensity of sonic boom that proved problematic for first generation supersonic transports such as Concorde (''cf.'' Operation Bongo). The boom caused by Concorde generated substantial public opposition in the United States and eventually in other countries around the world. This opposition made it impossible for Concorde to be a commercial success. The sonic boom issue was also a significant factor in the eventual cancellation of the Boeing 2707. Shock waves develop around aircraft as they near Mach 1 (1225.0 km ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mach Number
The Mach number (M or Ma), often only Mach, (; ) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after the Austrian physicist and philosopher Ernst Mach. \mathrm = \frac, where: * is the local Mach number, * is the local flow velocity with respect to the boundaries (either internal, such as an object immersed in the flow, or external, like a channel), and * is the speed of sound in the medium, which in air varies with the square root of the thermodynamic temperature. By definition, at Mach1, the local flow velocity is equal to the speed of sound. At Mach0.65, is 65% of the speed of sound (subsonic), and, at Mach1.35, is 35% faster than the speed of sound (supersonic). The local speed of sound, and hence the Mach number, depends on the temperature of the surrounding gas. The Mach number is primarily used to determine the approximation with which a flow can be treated as an i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
