Italy prepares to launch submarine rescue vessel programme

Sur le même sujet

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  9 juin 2021 | International, Aérospatial

  Delivery of new Air Force One planes could be delayed until 2025

  Boeing has shown interest in re-opening negotiations that would raise the ceiling on the program's $3.9 billion contract, Air Force officials said.

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  3 octobre 2019 | International, Terrestre

  Latvia relaunches ground vehicle competition following industry complaints

  By: Aaron Mehta WASHINGTON — In recent years, the Baltic nation of Latvia has gone on a modernization spending spree, putting down cash for new Black Hawk helicopters, self-propelled howitzers, reconnaissance vehicles and anti-tank weapons. But there's another platform competition on the horizon, with officials in Riga having relaunched a stalled contest for tactical wheeled vehicles. In 2018, Latvia's Ministry of Defence awarded to Finland's Sisu Auto a €181 million (U.S. $197 million) deal for four-wheel drive armored vehicles. But the contract was overturned in early 2019 by a government watchdog after two bidders — AM General from the United States, and South Africa's Paramount Group — filed complaints over the process. Turkish firm Otokar had also bid on the program at the time. The recompete has seen offers from more than 10 companies for what will be a government-to-government agreement for a final contract. The price for the new contract will depend on the eventual winner and is not locked in at the Sisu contract level. Speaking to Defense News in September, Janis Garisons, state secretary for the MoD, said it's unlikely the government will reach a decision on the winner of the competition in the short term. “What we have to do, we will test the vehicles, because we want to ensure we are looking at vehicles fit for our terrain, that can drive into our forests and we are not [getting] stuck on the roads,” said Garisons, who is the No. 2 official at the ministry. “We will look also at the industrial part because we very much interested to have [the] ability to maintain those vehicles.” The last point is key, as Latvia is concerned about the ability to maintain its new purchases, something the country has struggled with, according to Garisons. “We don't want to be in that situation anymore.” The country is also focused on building up its domestic industrial base so that much of the maintenance on its new equipment can be done in-country, in case of conflict. Along those lines, the competition for a four-wheel drive vehicle is likely be the last big platform purchase for a while, as the ministry is turning its attention toward procurement efforts to benefit training and sustainment. “Now we face trying to implement everything and put [them] into service. This takes time, and of course all logistical tails, which goes with that,” he said. “Therefore, we now have to concentrate more on — it's not very fancy things, but basically the training is going on already on all those capabilities that [have been bought], but now we have to ensure all the logistical issues are solved and maintained and sustainment is ensured.” Regarding research and development, Latvia is working on a joint effort with Estonia to produce unmanned ground vehicles. “That is something for the future capabilities. The goal is to understand our limits and how to engage our companies, also, coming up with solutions for autonomous systems,” Garisons said. “Because I think the biggest issue right now is how to ensure that those unmanned vehicles can operate autonomously and not need the soldier operating, as that doesn't add much value.” https://www.defensenews.com/2019/10/02/latvia-relaunch-ground-vehicle-competition-following-industry-complaints

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  31 octobre 2019 | International, Aérospatial

  As Era Of Laser Weapons Dawns, Tech Challenges Remain

  Steve Trimble As the U.S. Air Force comes within weeks of the first operational laser weapons, the Defense Department is hatching new concepts to address the power and thermal management limits of the state-of-the-art in the directed energy field. In a largely secret dress rehearsal staged last week at Fort Sill, Oklahoma, the Air Force performed another round of tests of the deploying Raytheon High Energy Laser Weapon System (HEL-WS), as well as other directed energy options, such as the Air Force Research Laboratory's Tactical High Power Microwave Operational Responder (THOR), says Kelly Hammett, director of AFRL's Directed Energy Directorate. “All I can say is there were multiple systems. From my reading of the reports, it looked like a very successful exercise,” says Hammett, who addressed the Association of Old Crows annual symposium Oct. 29. The Fort Sill experiment was intended to put the weapons through their paces in a realistic operational environment. AFRL's Strategic Development, Planning and Experimentation (SDPE, which, despite its spelling, is pronounced “Speedy”) office called on the HEL-WS and THOR to engage swarms of small unmanned aircraft systems (UAS). The experiments also demonstrated new diagnostic tools, allowing AFRL testers to understand the atmosphere's effect on energy propagation in real time. SDPE awarded Raytheon a contract in August to deliver a “handful” of systems to the Air Force for a one-year deployment scheduled to conclude in November 2020. The HEL-WS will be used to defend Air Force bases from attacks by swarming, small UAS and cruise missiles, Hammett says. The Air Force is not releasing the location of the deployed sites for the HEL-WS. AFRL also is grooming THOR for an operational debut. Instead of blasting a UAS with a high-energy optical beam, THOR sends powerful pulses of radio frequency energy at a target to disable its electronics. Hammett describes THOR as a second-generation directed energy weapon. It is designed to be rugged for operational duty and compact enough to be transported inside a single container loaded into a Lockheed Martin C-130. Upon unloading from the aircraft, THOR can be activated within a couple hours, or broken down and moved within the same period, he says. Despite decades of basic research on directed energy systems, such operational capabilities have evolved fairly rapidly. The Air Force finally consolidated its strategy for developing directed energy weapons in the 2017 flight plan, Hemmett said. The document narrowed a once-fragmented research organization that attempted to address too many missions. “Directed energy zealots like myself have been blamed, rightly so, of saying directed energy can do almost anything you want it to do. And we pursued multiple applications to the effect that we were diffusing some of our efforts,” he says. The 2017 flight plan selected three initial use cases: Air base defense, precision strike and self-protect. The HEL-WS and THOR are addressing the first mission. The Joint Navy-Air Force High Power Electromagnetic Non-Kinetic Strike (Hijenks) program is developing a missile to address the precision strike requirement, as a follow-on to the Counter-electronics High Power Microwave Advanced Missile Project (Champ) that concluded five years ago. In the long-term, AFRL also plans to demonstrate the Self-Protect High Energy Laser Demonstrator (Shield), a podded defensive weapon for aircraft. Although such technology has come far, researchers are still grappling with fundamental issues to make them practical. Namely, the power generation and thermal management requirement for high-energy lasers and high-power microwaves remains a challenge. “If you're willing to have very limited duty-cycle, very limited magazine, the power and thermal management aren't very challenging,” Hemmett says. “Of course, that's not what we want from directed energy weapons. We want deep magazines. We want to be able to handle wave attacks as favorably or more favorably that kinetic weapons.” The “rule of thumb” for a high-energy laser is an efficiency of about one-third, meaning a 300-kW generator is necessary to create a 100-kW laser beam, resulting in 200 kW of waste heat that must be dealt with in some way, says Frank Peterkin, a senior technologist on directed energy for the U.S. Navy who spoke at the same event. On Navy ships, that puts the laser in competition with the electronic warfare and radar subsystems for power and thermal management loads, he adds. “The challenge for the directed energy community is we don't really own the solution,” Peterkin says. “It does need to be a more holistic solution for the Navy. We are a customer, but we're not driving the solution, per se.” Although directed energy researchers cannot design the power grids for bases, ships and aircraft, they can help the requirement in other ways, says Lawrence Grimes, director of the Directed Energy Joint Transition Office within the Defense, Research and Engineering directorate of the Office of the Secretary of Defense. The development of special amplifier diodes for fiber optic lasers are breaking the “rule of thumb” for high-energy systems, Grimes says. “They actually operate at higher temperatures and higher efficiency, so they can reduce the requirement necessary for the prime power and thermal management, and we're not throwing away 200 kW.” Other Defense Department organizations are pursuing more ambitious options. The Strategic Capabilities Office is selecting suppliers to demonstrate small, 10 MW-size nuclear reactors, as a power generation option for directed energy weapons at austere forward operating bases. Meanwhile, AFRL also is considering space-based power generation. Under the Space Solar Power Incremental Demonstrations and Research program, AFRL will investigate using high-efficiency solar cells on a spacecraft to absorb the solar energy. The spacecraft then would convert the solar energy into a radio frequency transmission and beam it to a base to supply energy. AFRL has awarded Northrop Grumman a $100 million contract to begin developing the technology. If those seem like long-term options, the Air Force is not immediately concerned. The HEL-WS and THOR are designed to use “wall-plug” power or the military's standard electric generators, Hammett says. https://aviationweek.com/defense/era-laser-weapons-dawns-tech-challenges-remain