17 mai 2021 | International, Aérospatial

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

Le constructeur suédois Saab est parvenu, pour la première fois, à faire voler un avion équipé d'une pièce extérieure imprimée en 3D. L'avionneur utilise la technologie de la fabrication additive depuis quatre ans, notamment pour imprimer des pièces internes, précise L'Usine Nouvelle. La pièce, une trappe située sur le flanc arrière du fuselage de l'appareil, un modèle Gripen, a été imprimée sur la base du scan de la pièce originelle. Parfaitement ajustée à l'avion, elle n'a montré « aucun changement structurel visible après le vol d'essai », assure Hakan Stake, responsable du projet, dans un communiqué. Cette démonstration devrait, à terme, « permettre au personnel sur le terrain d'avoir accès à des pièces de rechange ajustées individuellement, d'éviter les réparations d'urgence ou de cannibaliser un appareil déjà endommagé », souligne-t-il. Il estime par ailleurs que cette solution permettra de réduire le nombre de pièces transportées lors du déploiement d'un appareil et de réduire son temps de réparation. De nombreuses étapes de certification du matériau utilisé, un polyamide 2200, couramment utilisé dans la fabrication additive, sont encore nécessaires avant de déployer la technologie sur le terrain.

L'Usine Nouvelle du 17 mai

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  • Space Force invokes Defense Production Act to prop up small launch market

    25 juin 2020 | International, Aérospatial

    Space Force invokes Defense Production Act to prop up small launch market

    Nathan Strout The Space and Missile Systems Center will award ride-share contracts to six small launch providers under the Defense Production Act, providing support to a market the Pentagon has repeatedly said is vulnerable to coronavirus-related financial restraints. The six companies approved by the Industrial Base Council are Aevum, Astra, X-BOW, Rocket Lab USA, Space Vector and VOX Space. Each company will be awarded sole-source contracts for two ride-share missions to be conducted over the next 24 months. The value of the contracts was not included in the announcement originally posted on SAM.gov on June 16. Funding for the 12 ride-share missions will come from the Defense Production Act Title III funding effort, which is backed by the recently passed coronavirus relief act. The Pentagon has singled out the small launch market as being particularly hard hit by the COVID-19 pandemic over the last few months. On April 20, Undersecretary of Defense for Acquisition and Sustainment Ellen Lord warned that the small launch market was one of three sectors she was most worried about. In a later statement to C4ISRNET, the Space and Missile Systems Center elaborated on her remarks. “There is concern that the current financial and market constraints resulting from the COVID-19 have reduced funding sources necessary to continue development and operations for the nascent small launch industry,” said Col. Rob Bongiovi, director of SMC's launch enterprise directorate. “Much of the industry have limited flight capability or are in the critical transition from development to flight and this funding restriction may prevent or delay these systems. The Space and Missile Systems Center is evaluating the impacts to the small launch industrial base to consider actions to enable a robust U.S. launch industrial base.” In response, the Space Force Acquisition Council held an emergency meeting with representatives from the U.S. Space Force, the National Reconnaissance Office, the Space Development Agency and others. A survey was sent out to members of the Space Enterprise Consortium to see how the Defense Department could help. SMC Commander Lt. Gen. John “JT” Thompson hinted earlier in the week that Defense Production Act awards would be forthcoming for the small launch market. “In the small launch environment, Secretary Lord and [U.S. Space Force Service Acquisition Executive Will] Roper have both commented about how important small launch is to our enterprise, and I can't give you the details right now but I would anticipate here very shortly some very critical Defense Production Act awards to our small launch providers to keep that industry going,” Thompson said. https://www.c4isrnet.com/battlefield-tech/space/2020/06/19/space-force-invokes-defense-production-act-to-prop-up-small-launch-market/

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  • Foreign defense companies want in on US Army modernization efforts

    27 juin 2018 | International, Aérospatial, Naval, Terrestre, C4ISR

    Foreign defense companies want in on US Army modernization efforts

    By: Jen Judson and Sebastian Sprenger PARIS, France — The U.S. Army has honed in on six modernization priorities, none of which can afford to linger in a sluggish acquisition process as threats grow in sophistication and the battlefield grows more complex, which has piqued the interest of many foreign companies, who are banking on having an increased chance at playing in the U.S. market due to the pace at which the Army wants to prototype and procure capabilities. At European defense conference Eurosatory, several companies unveiled not just paper or miniature model concepts but actual capabilities targeting the top two priorities: The Next-Generation Combat Vehicle (NGCV) and Long-Range Precision Fires (LRPF). The Army announced last fall that it would establish a four-star command to tackle its modernization priorities in short order. They are LRPF, NGCV, Future Vertical Lift, the Network,Air-and-Missile Defense and Soldier Lethality, in that order. And since that announcement, the service has set up cross-functional teams to focus on each priority. Many leaders of the CFTs said earlier this year that they planned to prototype capabilities within just a few years and get them into the hands of soldiers. Next-gen combat vehicles The U.S. Army's first stab at building prototypes for what it intends to be an innovative, leap-ahead NGCV and its robotic wingman will be ready for soldier evaluations in fiscal 2020 with a follow-on prototypes expected in 2022 and 2024. Germany's Rheinmetall Defence revealed its new Lynx KF41 infantry fighting vehicle at Eurosatory on June 12 with an eye toward the U.S. market. The company pulled out all the stops including a 10:00 a.m. champagne toast to christen the vehicle. It's sometimes the case, at a unveiling, for the vehicle to just be a non-functioning, life-size model to convey the concept, but Rheinmetall made it clear the vehicle being shown is real. The company has publicly available footage of the vehicle's rigorous test campaigns. Executives at Rheinmetall told Defense News it believes the stars could be aligned for a successful pitch of the Lynx vehicle to the U.S. Army. Due to its modular design, a few hours of work can turn the Lynx into anything from a medium tank to a battlefield ambulance. Ben Hudson, head of the company's vehicle systems division, hopes the feature will be an interesting proposition for the U.S. Army's NGCV. “We are highly interested in it, and we have been below the radar for a little for the last couple of years while we've delivered this,” Hudson told Defense News following the unveiling. “We don't want to deliver a PowerPoint, we want to deliver a real vehicle, and we have shown this to some people in the U.S. Army and I think it is fair to say there is some genuine interest for the U.S. to look at this vehicle as a serious competitor for the Next-Generation Combat Vehicle.” When asked how Rheinmetall might become involved in that collaboration, Hudson said there have been a lot of changes over the past several months as the Army's new cross-functional team under its new Futures Command moves forward with efforts to bring an NGCV capability online. “All I can say is the next six months for that program are going to be very interesting, and we look forward to things that may occur early next year. That's all I can really say about that for now,” he said. What's still missing, however, is an official U.S. partner company that could give the bid an American face and manage domestic production. Such teaming is practically mandatory these days, and Hudson said there is no shortage of suitors. “We've had significant interest from U.S. companies at Eurosatory over the last couple of days,” he said. “We've had a lot of people interested in partnering with us because we don't only have a concept, we've got a real vehicle and turret for the program.” Israeli company Rafael didn't have a dramatic unveiling at the show, but told Defense News that it was developing and testing a 30mm weapon station outfitted with its Trophy active protection system as an all-in-one system. The Army is outfitting several brigades worth of Trophy APS on its Abrams tanks. The turret can be purchase with our without the Trophy system, Rafael's Michael L. told Defense News at the show. Michael's last name has been withheld for security reasons. One customer is buying more than a hundred 30mm weapon stations, he said. And while Rafael is envisioning the possibility of its 30mm turret and APS system being a good option for outfitting upgunned Strykers going forward, it's also setting its sights on becoming involved in NGCV prototyping with its work in flexible turret design as well as in its long history fielding APS capability. But not every leading tank manufacturer outside of the U.S. is clamoring to get involved in the U.S. combat vehicles market. In the case of Germany's Krauss-Maffei Wegmann and its French partner Nexter, executives believe the odds of selling entire vehicles to the American armed forces are dim. “We play a role in the U.S., we are selling in the U.S., but not on a system level,” KMW boss Frank Haun said during an interview at Eurosatory. Mayer, his Nexter counterpart, added that “political reasons” and the “industry landscape” make it difficult for outsiders to break into a market tightly controlled by domestic players. In Haun's experience, arms sales to the U.S. have the highest chance of succeeding when there is little money at stake. “Whatever is under the radar of senators and congressmen will work,” he said. U.S. defense contractors have significant influence in Congress thanks to traditional lobbying campaigns targeting both Democrats and Republicans. In addition, many large companies employ workers in plants across the United States, which means lawmakers from those areas are eager to ensure a continued flow of defense money to the contractors. Long-range precision fires The U.S. Army will demonstrate LRPF technology from a precision-strike missile to hypersonics and ramjet capabilities within the next couple of years, according to the service's LRPF CFT. In the near future, the service is looking at how it will evolve its current M109A7 self-propelled howitzer — or the Paladin Integrated Management — into extended-range cannon artillery. At the same time, a competition is ongoing to build a new LRPF capability that replaces and surpasses the Army Tactical Missile System (ATACMS). Norwegian ammunition company Nammo unveiled what it's calling an “extreme range” artillery concept using ramjet propulsion that it hopes will meet the emerging LRPF requirements for a variety of countries, including the United States. Nammo has combined its experience in both ammunition and rocket-propulsion technology, and it's merging those capabilities to create an artillery shell capable of reaching more than 100 kilometers in range without changing the gun on a standard 155mm howitzer, according to Thomas Danbolt, company vice president of large caliber ammunition, who spoke at Eurosatory, one of the largest land warfare conferences in Europe. The company displayed a model of the artillery shell at the exposition and plans to test several LRPF capabilities in the coming years, particularly its new extreme-range artillery projectile. The projectile will go through a flight demonstration in the 2019 or 2020 time frame, according to Erland Orbekk, company vice president for ramjet technology, which coincides with the Army's LRPF CFTs tentative plans to test ramjet and hypersonics capabilities as early as 2019. Swedish company Saab has also teamed up with Boeing to develop a Ground-Launched Small-Diameter Bomb (GLSDB) and announced at the show that the pair had demonstrated — in cooperation with the U.S. Army Aviation & Missile Research, Development and Engineering Center (AMRDEC) — its capabilities for ground forces during a test fire where the laser-enabled weapon launched and then tracked and engaged a moving target at a distance of 100 kilometers. The range ultimately will be closer to 150 kilometers. The partnership allows for the team to easily tap the U.S. market as well as international customers interested in improving rocket artillery capability, according to Boeing's Jon Milner, within the company's direct attack weapons international programs division. Milner said Boeing and Saab would continue to assess what customers want. The U.S. Army has made it clear it needs longer range artillery in order to avoid being out-gunned and out-ranged by adversaries, but also a lot of NATO countries are interested in the capability because of NATO mandates which creates a significant international market for the weapon. https://www.defensenews.com/digital-show-dailies/eurosatory/2018/06/26/foreign-defense-companies-want-in-on-us-army-modernization-efforts/

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