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  19 juin 2019 | International, Aérospatial

  Northrop to build 3D-printed scramjet engine for Raytheon hypersonic weapon

  By: Valerie Insinna LE BOURGET, France — Raytheon has partnered with Northrop Grumman on its air-breathing hypersonic weapon, which will be powered by a Northrop-made scramjet made entirely of 3D-printed parts, the company announced Tuesday. Raytheon and Northrop's weapon is one of the competitors in the U.S. Defense Advanced Research Projects Agency's HAWC project, short for Hypersonic Air-Breathing Weapon Concept. The companies' offering — which comprises Northrop's scramjet engine and Raytheon's air vehicle — is ready to make its first flight, said Tom Bussing, vice president of Raytheon's advanced missile system segment. “We have a flight test planned for the near future where we will begin flying this particular class of weapon system,” he said during a briefing at Paris Air Show. While the exact schedule is classified, Bussing noted that the companies have already conducted “significant” ground tests “The combustor, everything that we do now is done by additive manufacturing, so its driving affordability into the hypersonic boost missile's scramjet engine. We are also looking at ways to reduce the weight so we can have more fuel, more payload,” he said. The entirety of Northrop's scramjet is 3D printed using advanced materials, said John Wilcox, the company's vice president of advanced programs and technology. “There gets to be points where you have to weld additive manufactured parts, but right now even the full combustor [is printed],” he said. “We think we're the first to ever 3D print a full combuster for an air-breathing scramjet engine. That's what's going to drive the affordability for air-breathing scramjet missiles.” According to Raytheon, scramjet engines use high vehicle speeds to then compress air moving into its inlets before combusting it. The process allows a vehicle to maintain hypersonic speeds — more than five times the speed of sound — over longer periods of time. The Raytheon-Northrop team is competing against Lockheed Martin for the final HAWC contact. https://www.defensenews.com/digital-show-dailies/paris-air-show/2019/06/18/northrop-to-build-3d-printed-scramjet-engine-for-raytheon-hypersonic-weapon/

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  18 mars 2022 | International, Naval

  As US Navy rethinks its fleet, Ingalls Shipbuilding faces uncertain future

  Over the past three years, the U.S. Navy has tightened its budget and changed its requirements, making the future look far less rosy for a division of Huntington Ingalls Industries.

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  9 octobre 2018 | International, Terrestre

  Milley: We’re going to cut instructor-trainee ratios at Army basic training in half

  By: Meghann Myers So far, 2018 has seen an overhaul of basic combat training and a pilot programto extend infantry one-station unit training from 14 to 22 weeks. Next stop: Reducing the number of trainees assigned to each drill sergeant. Earlier this year, the Army sent drill sergeants back to advanced individual training, bringing uniformity to the whole of initial entry training for new soldiers who move onto a second training program following basic. But the ratio of trainers to trainees is still “way too high,” Army Chief of Staff Mark Milley told Army Times on Monday at the AUSA annual meeting in Washington, D.C. “And that's because we intentionally, over the last 17 years, we trimmed our institutional force ... in order to feed the fight in Iraq and Afghanistan and make sure that those deploying units had enough people,” he said. So that left the base with 20 trainees for every one drill sergeant at basic combat training, and 40-to-1 at AIT. “We want to essentially cut those ratios in half,” Milley said, while adding a platoon sergeant and officer platoon leader to each of those units. The Army is counting on a steady rise in end strength to 500,000 active component soldiers in the next four years. Those new additions are slated first to fill spots in operational units, but the training base is also hurting for more of the unprecedented number of noncommissioned officers who have been re-enlisting. Decreasing the ratio of drill sergeants to trainees comes at a time when basic training programs are extending, requiring yet more instructors. The Army wants to improve basic combat training “not just in the length, but in the quality and attention paid to each trainee,” Milley said. Infantry OSUT completed a pilot program to extend from 14 to 22 weeks this summer, Army Secretary Mark Esper told Army Times, and that plan will extend in the next year to armor, combat engineers and others. “If we step back and ask ourselves, why? Why extend it?” Esper said. “I think it's lessons learned from the field, the operational Army that says, ‘Look, we're getting solders who could use more time to develop their physical fitness.' Maybe spend more time talking about the military traditions and our history, that [they] would come to the service with a greater sense of discipline.” Some more tactical and technical expertise wouldn't hurt, he added. “We thought adding two months would be what it takes,” for OSUT, Esper said, making it the “Longest and most challenging infantry basic training the world. Depending on what we learn ... we would seek to apply those lessons to other MOSs.” https://www.armytimes.com/news/your-army/2018/10/08/milley-were-going-to-cut-instructor-trainee-ratios-at-army-basic-training-in-half