German leaders abandon blockade of Eurofighter sale to Saudi Arabia

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  11 octobre 2019 | International, Aérospatial

  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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  10 juillet 2019 | International, Aérospatial, Autre défense

  Here’s the No. 1 rule for US Air Force’s new advanced battle management system

  By: Valerie Insinna LE BOURGET, France, and WASHINGTON — The U.S. Air Force has started work on a data architecture for its Advanced Battle Management System, the family of platforms that will eventually replace the E-8C JSTARS surveillance planes. But the “biblical” rule for the program, according to the service's acquisition executive Will Roper, is that “we don't start talking platforms until the end,” he told Defense News at the Paris Air Show in June. “It is so easy to start talking about satellites and airplanes and forget what ABMS is going to have to uniquely champion, which is the data architecture that will connect them,” Roper explained. “I'm actually glad we don't have big money this year because we can't go build a drone or a satellite, so we've got to focus on the part that's less sexy, which is that data architecture,” he said. “We're going to have to do software development at multiple levels of classification and do it securely. All of those are things that are hard to get people energized about, but they're going to be the make-or-break [undertakings] for this program.” Some initial work has begun on identifying the requirements for ABMS data architecture. The service in March named Preston Dunlap, a national security analysis executive at Johns Hopkins University Applied Physics Laboratory, as the program's “chief architect.” Dunlap will be responsible for developing the requirements for ABMS and ensuring they are met throughout the menu of systems that will comprise it. The Air Force Warfighter Integration Center, or AFWIC — the service's planning cell for future technologies and concepts of operation — provided feedback to Dunlap about how ABMS should work, Roper said. The Air Force is still deliberating what ABMS will look like in its final form, although officials have said it will include a mix of traditional manned aircraft, drones, space-based technologies and data links. The effort was devised as an alternative to a replacement for the E-8C Joint Surveillance Target Attack Radar System. While the service first considered a traditional recapitalization program where it would buy new JSTARS aircraft equipped with more sophisticated radars, leaders ultimately backed the more ambitious ABMS proposal, believing it to be a more survivable capability. But defense companies are hungry for more information about the platforms that will comprise ABMS, seeing the opportunity to develop new systems or upgrade legacy ones as a major potential moneymaker. Once the service has defined an ABMS data architecture — which Roper believes will occur before the fiscal 2021 budget is released — it will need to form requirements for the data that will run through and populate it as well as the artificial intelligence that automatically sorts important information and passes it to users. “Maybe one sensor needs to be able to fill a gap that others are creating,” he said. “We're going to have to look at requirements at a systems level and tell satellites that you need to be able to provide this level of data at this refresh rate. UAVs, you need to be able to do this rate and so on and so forth. Once we do that, then we'll be in the traditional part of the acquisition, which will be building those satellites, building those UAVs.” The Air Force intends to conduct yearly demonstrations throughout this process, the first of which will involve “ad hoc mesh networking,” which will allow platforms to automatically begin working together and sharing information without human interference. By FY21, full-scale prototyping could start, he said. In the commercial sector, where devices can be seamlessly linked and monitored over the internet, this concept is known as the internet of things. But that construct — where companies build technologies from the get-go with open software — is difficult to replicate in the defense world, where firms must meet strict security standards and are protective of sharing intellectual property that could give competitors an edge. “Openness in the internet of things makes sense because you can monetize the data,” Roper said. “That's not going to exist for us, so we're going to have to have a contracting incentive that replicates it. The best theory we have right now is some kind of royalty scheme that the more open you are and the more adaptation we do on top of your system, the more you benefit from it.” The service wants to hold a series of industry days to see whether such a construct would be appealing to defense companies, and how to structure it so that it will be fair and profitable. One unanswered is how to incentivize and compensate defense firms that build in new software capability. “If you create the system that allows us to put 100 apps on top of it, you benefit differently than if we can only put one. But the details are going to be difficult because maybe that one app is super important,” Roper said. “But if we can't replicate profit and cash flow on which their quarterlies depend, then they're going to have to go back to the old model of saying they are for open [architecture] but secretly giving you closed.” https://www.defensenews.com/digital-show-dailies/paris-air-show/2019/07/09/rule-no1-for-air-forces-new-advanced-battle-management-system-we-dont-start-talking-platforms-until-the-end/

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  8 mai 2020 | International, Aérospatial

  Podcast: International Fighter Competitions

  Jen DiMascio Tony Osborne Steve Trimble On the heels of Germany's proposal to purchase both Eurofighter Typhoons and Boeing F/A-18 Super Hornets, Aviation Week editors Jen DiMascio, Tony Osborne and Steve Trimble discuss ongoing fighter competitions around the world on Check 6, highlighting one of the most dynamic markets in aerospace. https://aviationweek.com/defense-space/podcast-international-fighter-competitions