Navy Awards Boeing $43 Million to Build Four Orca XLUUVs

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  October 11, 2019 | International, Aerospace

  NFAC Tests Next-Generation Military Helicopter

  Wind Tunnel Test Designed To Validate The Aerodynamic Performance And Flight Mechanics Of Sikorsky's X2 Technology Aircraft The U.S. Army is looking to improve its aviation technology and recently called upon the AEDC National Full-Scale Aerodynamics Complex at Moffett Field in Mountain View, CA, to advance this effort. Engineers from Sikorsky Aircraft Corporation and The Boeing Company, in partnership with the U.S. Army Combat Capabilities Development Command Aviation & Missile Center Army Aviation Development Directorate, recently conducted a series of tests at NFAC to support the development of the SB>1 DEFIANT, a military helicopter being developed for the Army's Joint Multi-Role Technology Demonstrator (JMR TD) program. The goal of this wind tunnel test was to validate the aerodynamic performance and flight mechanics of Sikorsky's X2 Technology aircraft. These configurations, which are being utilized on the SB>1 DEFIANT, include a lift-offset coaxial rotor system, composite fuselage and rear-mounted pusher propulsor that provides increased speed. The SB>1 DEFIANT, which made its first flight in March, is a technology demonstrator for a medium-lift utility helicopter. Future uses of this type of air vehicle could include attack and assault, troop transport or MEDEVAC. The testing was conducted throughout the first half of 2019 and concluded in mid-June. To accomplish the tests, a 1/5 scale model of the SB>1 DEFIANT airframe with powered coaxial main rotors was placed in the NFAC 40- by 80-foot wind tunnel. Measurements included forces and moments on the various components, as well as fuselage, empennage and blade surface pressures. David Wang, NFAC test engineer, said the recent tests expanded on data collected from a JMR wind tunnel entry conducted at NFAC in 2016 by gathering data at faster speed ranges. “From the NFAC perspective, the wind tunnel test was successful,” Wang said. “The test customer was able to collect performance and handling qualities data for their subscale model up to their maximum design flight speed.” Data collected during the recent tests is undergoing review and analysis. It is unknown at this time if there will be future testing of the SB>1 DEFIANT model at NFAC. The full-scale SB>1 DEFIANT flight demonstrator is currently undergoing ground and flight tests at Sikorsky's flight test facility. According to the Sikorsky-Boeing JMR Team, data from SB>1 DEFIANT will help the Army develop requirements for new utility helicopters expected to enter service in the early 2030s. A previous DOD study concluded that upgrades to the aging DOD rotary wing aviation fleet would not provide the capabilities required for future operations. Significant improvement in several attributes of fleet aircraft, such as speed, payload, range, survivability and vertical lift are required to meet future needs. It was determined this improvement could be achieved through application of new technologies and designs. To accomplish its goal, the Army has been executing a science & technology (S&T) effort to mitigate risk associated with maturity of critical technologies, feasibility of desired capabilities and cost of a technical solution. An aspect of this effort is the air vehicle development associated with the JMR TD program. JMR TD is the alignment of Army Aviation's S&T with the Future Vertical Lift initiative, which seeks to develop a new family of system to modernize and replace the government's current fleet of rotorcraft. According to the Army, the intent of the JMR TD is to mitigate risk for the Future Vertical Lift program through means that include the testing of advanced technologies and efficient vehicle configurations. NFAC, managed and operated by Arnold Engineering Development Complex (AEDC), is the largest wind tunnel complex in the world. It consists of both the 40- by 80-foot and 80- by 120- foot wind tunnels. These tunnels, which share a common drive system, are primarily used for aerodynamic and acoustic tests of rotorcraft and fixed wing, powered-lift V/STOL aircraft and developing advanced technologies for these vehicles. Both subscale and full-scale models are tested at NFAC. The speed range of the 40- by 80-foot wind tunnel test section is continuously variable from 0 to 300 knots, while the speed range in the 80- by 120-foot wind tunnel section is continuously variable from 0 to 100 knots. http://www.aero-news.net/index.cfm?do=main.textpost&id=021bcb83-4df9-4253-b7a3-ff3805b7b16a

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  April 9, 2021 | International, C4ISR

  L’intelligence artificielle susceptible de bouleverser les affrontements à venir

  DÉFENSE L'intelligence artificielle susceptible de bouleverser les affrontements à venir La Commission américaine à la sécurité nationale pour l'intelligence artificielle (NSCAI) a publié début mars un rapport alertant sur le possible bouleversement des conflits à venir sous l'effet du développement de l'intelligence artificielle. Des transformations qui pourraient notamment structurer l'affrontement stratégique entre les États-Unis et la Chine. Les auteurs du rapport, dont l'ancien dirigeant de Google Eric Schmidt, plaident pour l'adoption dès 2021 d'un plan de 40 milliards de dollars, afin de maintenir l'avantage technologique et stratégique des États-Unis. Les capacités américaines d'IA devraient être prêtes dès 2025, recommandent-ils. Dans sa stratégie pour l'intelligence artificielle de 2019, le ministère français des Armées identifiait aussi l'enjeu lié à l'intelligence artificielle : « L'IA peut constituer un agent déstabilisateur des équilibres établis en favorisant la compétition en matière d'armement, susceptible d'aboutir à des ruptures technologiques ou au nivellement des positions stratégiques », prévenait le ministère. Le Figaro du 9 avril

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  October 3, 2018 | International, Security

  China Cancels High-Level Security Talks With the U.S.

  By Jane Perlez BEIJING — China canceled an important annual security meeting planned for mid-October with Defense Secretary Jim Mattis in Beijing, saying a senior Chinese military officer would not be available to meet him, an American official said on Sunday. The decision to withdraw from the high-level encounter, known as the diplomatic and security dialogue, was the latest sign of bad blood between China and the United States, and capped a week of tit-for-tat actions by both nations as they settled into a newly chilly relationship. The cancellation of the dialogue, an event that China until recently had advertised as a productive way for the two sides to talk, showed how quickly the tensions over an escalating trade war have infected other parts of the relationship, particularly vital strategic concerns including Taiwan, arms sales and the South China Sea. A senior American foreign policy official summarized the administration's attitude to China last week, telling a crowd at the celebration of national day at the Chinese Embassy in Washington that the United States was intent on competing with China — brittle language that is usually absent from formal events. Full article: https://www.nytimes.com/2018/09/30/world/asia/china-us-security-mattis.html