Saab fait voler une pièce de fuselage d’avion de combat imprimée en 3D

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  2 juin 2020 | International, Naval

  All aboard the Sea Train!

  Imagine the following scenario. Four medium-sized U.S. Navy vessels depart from a port along the United States' coast. There's no crew aboard any of them. About 15 nautical miles off the coast, the four vessels rendezvous, autonomously arranging themselves in a line. Using custom mechanisms, they attach to each other to form a train, except they're in the water and there's no railroad to guide them. In this configuration the vessels travel 6,500 nautical miles across the open ocean to Southeast Asia. But as they approach their destination, they disconnect, splitting up as each unmanned ship goes its own way to conduct independent operations, such as collecting data with a variety of onboard sensors. Once those operations are complete, the four reunite, form a train and make the return journey home. This is the Sea Train, and it may not be as far-fetched as it sounds. The Defense Advanced Research Projects Agency is investing in several technologies to make it a reality. “The goal of the Sea Train program is to be able to develop and demonstrate long-range deployment capabilities for a distributed fleet of medium-sized tactical unmanned vessels,” said Andrew Nuss, DARPA's program manager for Sea Train. “So we're really focusing on ways to enable extended transoceanic transit and long-range naval operations, and the way that we're looking to do that is by taking advantage of some of the efficiencies that we can gain in a system of connected vessels — that's where the name ‘Sea Train' comes from.” According to DARPA, the current security environment has incentivized the Navy and the Marine Corps to move from a small number of exquisite, large manned platforms to a more distributed fleet structure comprised of smaller vessels, including unmanned platforms that can conduct surveillance and engage in electronic warfare and offensive operations. While these unmanned vessels are smaller and more agile than their large, manned companions, they are limited by the increased wave-making resistance that plagues smaller vessels. And due to their size, they simply can't carry enough fuel to make the long-range journeys envisioned by DARPA without refueling. By connecting the vessels — physically or in a formation — the agency hopes the Sea Train can reduce that wave resistance and enable long-range missions. In February, the agency released a broad agency announcement to find possible vendors. Citing agency practice, Nuss declined to share how many proposals were submitted, although he did say there was significant interest in the announcement. The agency completed its review of any submissions and expects to issue contracts by the end of the fiscal year. Sea Train is expected to consist of two 18-month periods, where contractors will work to develop and test technologies that could enable the Sea Train concept. The program will culminate with model testing in scaled ocean conditions. If successful, DARPA hopes to see the technologies adopted by the Navy for its unmanned platforms. “What we're looking to do is be able to reduce the risk in this unique deployment approach,” Ness said. “And then be able to just deliver that set of solutions to the Navy in the future, to be able to demonstrate to them that there is, potentially, a new way to deploy these vessels, to be able to provide far more operational range without the risk of relying on actual refueling or in-port refueling.” And while DARPA's effort is focused on medium-sized unmanned vessels — anywhere from 12 to 50 meters in length — the lessons learned could be applied to larger or smaller vessels, manned or unmanned. https://www.c4isrnet.com/unmanned/2020/06/01/all-aboard-the-sea-train/

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  10 janvier 2020 | International, Terrestre

  US Army picks winners to build light and medium robotic combat vehicles

  By: Jen Judson WASHINGTON — The U.S. Army has picked winners to build base platforms for its light- and medium-class robotic combat vehicles, according to a service statement released Jan. 9. The Army's Combat Capabilities Development Command and the service's Next Generation Combat Vehicle Cross-Functional Team “intends” — pending successful negotiations — to award a contract to QinetiQ North America to build four RCV-light prototypes and another contract to Textron to build four RCV-medium prototypes, the release stated. Through a rapid contracting mechanism, the National Advanced Mobility Consortium is coordinating the Army's awards to industry, and the service expects to be officially under contract with both companies by mid-February, according to the statement. While it was anticipated the Army would award up to two contracts per category at the end of the second quarter this fiscal year, it appears the awards have come earlier and are both limited to one company. The prototypes, according to the statement, will be used to “determine the feasibility of integrating unmanned vehicles into ground combat operations. The Light and Medium RCVs will be used to conduct a company-level experiment at the end of 2021." Results from that effort, as well as a platoon-level experiment in March 2020 and several virtual experiments, will help the Army decide in 2023 how it wants to proceed with robots on the battlefield. “Robots have the potential to revolutionize the way we conduct ground combat operations,” Brig. Gen. Ross Coffman, director of the NGCV CFT, said in the statement. “Whether that's giving increased fire power to a dismounted patrol, breaching an enemy fighting position, or providing [chemical, biological, radiological, nuclear and explosive] reconnaissance, we envision these vehicles providing commanders more time and space for decisions and reducing risk to soldiers.” Out of a large pool of whitepaper submissions, a Textron and Howe & Howe team, a team of QinetiQ North America and Pratt & Miller, HDT Global, and Oshkosh were each issued a request for prototype proposals in the RCV-light competition in October 2019. Three teams were picked to move on in the RCV-medium competition in November 2019: General Dynamics Land Systems, QinetiQ North America, and the Textron and Howe & Howe team. It is noteworthy that the companies selected to build prototypes in each category are the only two companies to have offerings in both the light and medium competitions, demonstrating potentially that they are the only companies with the flexibility to build in both categories. At the Association of the U.S. Army's annual conference in October, Textron and Howe & Howe dramatically unveiled their RCV Ripsaw M5, which is based on the latter's deep history of building unmanned ground vehicles, but adds technology like scalable armor and suspension as well as mobility options to cope with the challenges expected in the future fight. FLIR Systems is also part of the team, contributing its advanced sensors. “Bringing together Howe & Howe, Textron Systems and FLIR Systems really represents a dream team,” Textron CEO Lisa Atherton said in a statement released at the show. “We formed this team based on our shared focus to serve this customer with disruptive ideas and proven experience, and we are dedicated to meeting and exceeding their requirements through the RCV program.” The team told Defense News before the AUSA conference that it planned to submit a version of Ripsaw both for the light and medium variant of the Army's robotic combat vehicle. The Qinetiq and Pratt & Miller team submitted a variant of the Expeditionary Modular Autonomous Vehicle tailored toward the Army's RCV-light requirements. The offering combines Qinetiq's modular open-architecture control systems with Pratt & Miller's advanced mobility platform. The Army is also examining the utility of an RCV-heavy variant but is using robotic M113 armored personnel carriers as surrogate platforms for evaluations. That effort will focus on manned-unmanned teaming in a robotic wingman formation, with a manned Bradley Infantry Fighting Vehicle serving as the platform for the robot's operators. https://www.defensenews.com/land/2020/01/09/army-picks-winners-to-build-light-and-medium-robotic-combat-vehicles/

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  6 décembre 2023 | International, Terrestre

  Ukraine's latest weapons request includes THAAD air defenses and F-18s | Reuters

  Ukraine's latest list of U.S. weapons it says it needs to fight the Russian military includes sophisticated air defense systems, F-18 "Hornet" fighter jets, drones, Apache and Blackhawk helicopters, according to documents seen by Reuters.