18 août 2022 | International, Aérospatial

What the Hell Is Space Force Up To? Ronny Chieng Investigates

Spaceships. Lasers. It's the military in space! Ronny Chieng heads to the Pentagon to find out what Space Force, the sixth and coolest branch of the military...

https://www.youtube.com/watch?v=rkxtqg-lAZY

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  • US Army’s interim short-range air defense solution crystallizes

    3 juillet 2018 | International, Terrestre

    US Army’s interim short-range air defense solution crystallizes

    By: Jen Judson WASHINGTON — The U.S. Army's interim short-range air defense system, which will urgently fill a capability gap identified a few years ago in the European theater, has crystallized. The Army had already decided the Interim Maneuver-Short-Range Air Defense system would be developed around its Stryker combat vehicle, but it has now chosen Leonardo DRS to supply a mission equipment package that will include Raytheon's Stinger vehicle missile launcher, according to Col. Chuck Worshim, program manager for cruise missile defense systems with the Army's Program Executive Office Missiles and Space, who spoke to Defense News on June 28. General Dynamics Land Systems — which produces the Stryker — will be the platform integrator for the IM-SHORAD system, he added. The Army went through a selection process through the Department of Defense Ordnance Technology Consortium to determine the best collection of vendors to build prototypes. A Boeing-GDLS team was a front-runner for an interim SHORAD mission package, unveiling before any other vendor a solution in August 2017 at the Space and Missile Defense Symposium in Huntsville, Alabama. Using an Avenger system on top of the Stryker, which was the team's solution, sought to take what was already in the Army's inventory to create a system. And a SHORAD demonstration at White Sands Missile Range, New Mexico, last September saw more possibilities for the interim solution including Rafael's Iron Dome and South Korean defense firm Hanwha's Flying Tiger. But a dark horse emerged at the Association of the U.S. Army's Global Force Symposium, also in Huntsville, in March. Leonardo DRS showed an unassuming small-scale mock-up of its concept at its booth at the symposium that featured its partner Moog's Reconfigurable Integrated-weapons Platform. The platform would provide a choice of sights, direct-fire weapons and missiles, Ed House, DRS Land Systems' business development manager, told Defense News at the show. The system would be able to integrate both Stinger and Longbow Hellfire missiles, requirements for the service's IM-SHORAD solution. It also would come equipped with a complement of direct-fire weapons and sights to include the M230 chain gun and the 7.62mm coaxial machine gun. But the solution also has non-kinetic defeat capabilities and Rada's onboard multimission hemispheric radar. And that dark horse has won the opportunity to provide the mission equipment package for the IM-SHORAD prototype program. The system will also have Hellfire rails as well as an onboard sensor, according to Worshim. The Army decided to choose DRS to provide the mission equipment package because of the flexibility of its reconfigurable turret, which allows for growth opportunities should the threat change or something else change that requires a new interceptor or another capability, Worshim said. The solution also posed less intrusion to the existing Stryker platform, he added, and provided an increased level of protection as the crew reloads ammunition, which can be done under armor. While the Avenger solution was deemed technically acceptable and met requirements, one of the reasons the Army decided against using the Avenger on Stryker as the solution was because the government felt it would require major modifications to the Stryker, according to Worshim. The Army has a desire to keep the Stryker as common across the fleet as possible, Worshim said. Boeing was also looking to the government to supply Avenger turrets, of which a limited amount of those exist readily in the service's inventory, which would have been problematic when considering the Army's goal to deliver 144 IM-SHORAD systems by fiscal 2022, he explained. Now that vendors have been selected, the Army will move into a negotiation period expected to wrap up in mid- to late July. The service expects to officially award the contract to build nine prototypes by Aug. 31, but has the intention to possibly move that date up, Worshim said. Once the contracts are solidified, DRS will provide the first mission equipment package, complete with a new digital Stinger missile launcher in February 2019. Then GDLS will fully integrate the SHORAD prototype by April 2019. The final prototypes will be delivered to the service by the first quarter of fiscal 2020. As the prototypes are coming along, the Army will conduct prototype testing to see if the systems are meeting requirements. “From there, the Army will decide if this solution truly meets requirements in this respect,” Worshim said. If the solution does meet requirements, production efforts to build 144 systems — a total of four battalions — will move forward. The Army's goal is to provide the first battery no later than the fourth quarter of 2020, but that will depend on funding. If funding is lower than expected, the Army will deliver the first platoon by about that time, according to Worshim. The service has moved from receiving a directed requirement in late February 2018 to selecting vendors for the IM-SHORAD solution in just about four months, which, Worshim noted, is moving at “lightning speed” for a typical acquisition process. The hope is the process to build an IM-SHORAD solution will be used as a model for Army procurement that incorporates the “fly before you buy” concept and creates a way to rapidly understand capabilities moving forward, he said. https://www.defensenews.com/land/2018/06/28/us-armys-interim-short-range-air-defense-solution-crystallizes/

  • Future US Navy weapons will need lots of power. That’s a huge engineering challenge.

    26 juin 2018 | International, Naval

    Future US Navy weapons will need lots of power. That’s a huge engineering challenge.

    David B. Larter WASHINGTON ― The U.S. Navy is convinced that the next generation of ships will need to integrate lasers, electromagnetic rail guns and other power-hungry weapons and sensors to take on peer competitors in the coming decades. However, integrating futuristic technologies onto existing platforms, even on some of the newer ships with plenty of excess power capacity, will still be an incredibly difficult engineering challenge, experts say. Capt. Mark Vandroff, the current commanding officer of the Carderock Division of the Naval Surface Warfare Center and the former Arleigh Burke-class destroyer program manager who worked on the DDG Flight III, told the audience at last week's American Society of Naval Engineers symposium that adding extra electric-power capacity in ships currently in design was a good idea, but that the weapons and systems of tomorrow will pose a significant challenge to naval engineers when it comes time to back-fit them to existing platforms. “Electrical architecture on ships is hard,” Vandroff said. Vandroff considered adding a several-megawatt system to a ship with plenty of power to spare, comparing it with simultaneously turning on everything in a house. “When you turn everything on in your house that you can think of, you don't make a significant change to the load for [the power company],” Vandroff explained. “On a ship, if you have single loads that are [a] major part of the ship's total load, [it can be a challenge]. This is something we had to look at for DDG Flight III where the air and missile defense radar was going to be a major percentage of the total electric load ― greater than anything that we had experienced in the previous ships in the class. That's a real technical challenge. “We worked long and hard at that in order to get ourselves to a place with Flight III where we were confident that when you turned things on and off the way you wanted to in combat, you weren't going to light any of your switchboards on fire. That was not a back-of-the-envelope problem, that was a lot of folks in the Navy technical community ... doing a lot of work to make sure we could get to that place, and eventually we did.” In order to get AMDR, or SPY-6, installed on the DDG design, Vandroff and the team at the DDG-51 program had to redesign nearly half the ship — about 45 percent all told. Even on ships with the extra electric-power capacity, major modifications might be necessary, he warned. “We're going to say that in the future we are going to be flexible, we are going to have a lot of extra power,” Vandroff said. “That will not automatically solve the problem going forward. If you have a big enough load that comes along for a war-fighting application or any other application you might want, it is going to take technical work and potential future modification in order to get there.” Even the powerhouse Zumwalt class will struggle with new systems that take up a large percentage of the ship's power load, Vandroff said. “Take DDG-1000 ― potentially has 80-odd megawatts of power. If you have a 5- or 6-megawatt load that goes on or off, that is a big enough percentage of total load that it's going to be accounted for. Electrical architecture in the future is still an area that is going to require a lot of effort and a lot of tailoring, whatever your platform is, to accommodate those large loads,” he said. In 2016, when the Navy was planning to install a rail gun on an expeditionary fast transport vessel as a demonstration, service officials viewed the electric-power puzzle as the reason the service has not moved more aggressively to field rail gun on the Zumwalt class. Then-director of surface warfare Rear Adm. Pete Fanta told Defense News that he wanted to move ahead with a rail gun demonstration on the JHSV because of issues with the load. “I would rather get an operational unit out there faster than do a demonstration that just does a demonstration,” Fanta said, “primarily because it will slow the engineering work that I have to do to get that power transference that I need to get multiple repeatable shots that I can now install in a ship.” https://www.defensenews.com/naval/2018/06/24/future-navy-weapons-will-need-lots-power-thats-a-huge-engineering-challenge/

  • US close to sending $567 million in immediate security aid to Taiwan

    22 septembre 2024 | International, C4ISR, Sécurité

    US close to sending $567 million in immediate security aid to Taiwan

    The package, awaiting final approval, would be almost double the size of a tranche sent last year.

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