17 juin 2022 | International, Naval

New bill would establish AUKUS submarine training program

A new training program would enroll young Australian naval officers in U.S. nuclear propulsion and submarine officer schoolhouses, and then send them to sea on a U.S. boat, ahead of Australia developing and fielding its own nuclear-powered sub.

https://www.defensenews.com/naval/2022/06/16/new-bill-would-establish-aukus-submarine-training-program/

Sur le même sujet

  • Here are the biggest weaknesses in America’s defense sector

    2 juillet 2019 | International, Sécurité, Autre défense

    Here are the biggest weaknesses in America’s defense sector

    By: Aaron Mehta WASHINGTON — Production of a component vital to protecting American troops from chemical attacks that can't keep up with need. Key suppliers of aircraft parts that could go bankrupt at any time. A key producer of missile components that closed for two years before the Pentagon found out. These are just some of the key findings of an annual report from the Pentagon judging the greatest risks to the defense industrial sector, underlining that while the overall defense industry continues to bring in massive profits, not all is well among the suppliers of key components that, while small pieces of larger systems, could impact America's ability to wage war. The annual “Industrial Capabilities” report, quietly released May 13 by the Defense Department's Office of Manufacturing and Industrial Base Policy, found that despite total dollars spent by the department on weapons and ammunition increasing year over year since 2016, the number of vendors supplying them has decreased. In addition, while the report found generally positive trends for the U.S. defense sector, it did warn that in certain areas, foreign weapon sales are decreasing. For instance, the U.S. saw its market share of global naval weapon exports go from 63 percent in 2007 to just 17 percent in 2017. And from 2008-2017, two reliable buyers of U.S. defense goods — Pakistan and South Korea — saw their U.S. procurement percentages drop. Pakistan went from 31 percent to 12 percent, while South Korea went from 78 percent to 53 percent. This is the first Industrial Capabilities report to be published since the October release of a White House-mandated study on the defense-industrial base. That study concluded, in part, that the government needs to increase use of its Defense Production Act Title III authorities, which allows the government to expend funds to support key production lines that might now otherwise survive. The latest report says that through March 2019, seven presidential determinations were issued to address “key industrial base shortfalls in lithium sea-water batteries, alane fuel cell technology, sonobuoys production, and critical chemicals production for missiles and munitions.” However, details of those agreements, such as how much funding might go toward fixing the issues, were pushed into a nonpublic appendix. Here are the biggest concerns, broken down by sector: Aircraft: The report cites long product and system development timelines, high costs for development and qualification, and limits on production as broad issues in the aircraft sector. Those issues are inherent in major defense programs, but the report also calls out the aging workforce and consolidation among the industrial base, which “has expanded into the sub-tiers of the supply chain, creating additional risks for single or sole source vendors.” As an example, the report notes there are only four suppliers with the ability to manufacture “large, complex, single-pour aluminum and magnesium sand castings” needed to make key parts of military aircraft. These four suppliers face “perpetual financial risk and experience bankruptcy threats” due to the insecure nature of Pentagon funding. “The single qualified source for the upper, intermediate, and sump housing for a heavy-lift platform for the Marines has experienced quality issues and recently went through bankruptcy proceedings,” the report adds. “Without a qualified or alternate qualified source for these castings, the program will face delays, impeding the U.S. ability to field heavy-lift support to Marine Corps expeditionary forces.” Finding qualified software engineers is another issue identified, with the report warning it is “increasingly difficult to hire skilled, cleared, and capable software engineers. As aircraft continue to increase in software complexity, it will become even more important for the sector to hire skilled software engineers.” Ground systems: The report says the Pentagon's plan of incremental updates to existing systems rather than wholesale new designs has created “a generation of engineers and scientists that lack experience in conceiving, designing, and constructing new, technologically advanced combat vehicles.” But the same issues of consolidation and lack of budget stability that showed up in the aircraft sector impact the ground vehicle sector. “Legislation and DoD industrial policy requires DoD to manufacture all large-caliber gun barrels, howitzer barrels, and mortar tubes at one organic DoD arsenal,” the report cites as an example. “There is only one production line at the arsenal for all of these items, and policy modifications to meet demand and surge from overseas have led to a lack of capacity to meet current production requirements.” Shipbuilding sector: When it comes to maritime vessels, the “most significant risks found were a dependence on single and sole source suppliers, capacity shortfalls, a lack of competition, a lack of workforce skills, and unstable demand,” the report found. The lack of competition goes from the highest levels, where four companies control the seven shipyards building military vessels, to the lowest components, such as “high-voltage cable, propulsor raw material, valves, and fittings.” Workforce concerns also dominate the shipbuilding sector. The report cites statistics from the Department of Labor predicting that between 2018 and 2026, there will be a 6–17 percent decrease in U.S. jobs in occupations critical to Navy shipbuilding projects, “such as metal layout (ship-fitting), welding, and casting.” If that is not addressed, a lack of skilled workers “will significantly impact the shipbuilding industry's ability to meet the Navy's long-term demand.” Munitions sector: A major concern in last year's annual report was the future of the U.S. munitions sector, and many of those issues remain in the 2019 version. The report identified “multiple risks and issues, including material obsolescence and lack of redundant capability, lack of visibility into sub-tier suppliers causing delays in the notification of issues, loss of design and production skill, production gaps and lack of surge capacity planning, and aging infrastructure to manufacture and test the products.” As an example, the report points to a voltage control switch, used in ignition devices and flight termination systems for Department of Defense missiles. Several years ago, the foundry that made a key component for the switch was purchased by another foundry, which then decided to close the factory. The Pentagon was not informed until two years after the foundry was closed, at which point “it became evident that the end-of-life buy, which was designed to last from three to five years, would only last six months.” In another case, two key chemicals in solid-fuel rocket motors became obsolete, requiring the DoD to scramble for potential replacements. Chemical, biological and radiological sector: The chemical, biological, radiological and nuclear defense sector provides protection for war fighters through items like respirators, masks and vaccines. But the report found serious issues regarding the industrial base's ability to provide that capabilities, indicating that Title III authorities might be needed in the near future to maintain production. As an example, the report points to production of ASZM‑TEDA1 impregnated carbon, a defense-unique material with only a single qualified source that, as a result, “precludes assurances for best quality and price.” The carbon is used in 72 chemical, biological and nuclear filtration systems, and the report notes that current sourcing arrangements “cannot keep pace with demand.” The DoD is already using Title III to modernize the production line and try to establish a second source for the material. Soldier systems: The collapse of the American textile market over the last three decades has left the department depending on single sources or foreign suppliers for soldier systems. Additionally, battery production is identified as a potential future issue. “Lack of stable production orders has resulted in lost capability and capacity, increased surge lead times, workforce erosion, and inhibited investments by remaining suppliers. Surge-capacity-limiting constraints occur at several points along the value chain, from raw material to final battery assembly,” the report says. Space systems: Aside from major issues around future threats to space assets from near-peer competitors, the report identifies major industrial base concerns for space as including “aerospace structures and fibers, radiation-hardened microelectronics, radiation test and qualification facilities, and satellite components and assemblies.” Other areas include solar panel development — “There is not enough space business for companies to justify R&D to improve cells without [government] help,” the report says — the erosion of the traveling-wave tube industry, and a lack of suppliers for key parts needed to produce precision gyroscopes needed for spacefaring systems. Electronics: The Pentagon has been sounding the alarm about China's growing power in the printed circuit board market, and this report continues that trend. The United States now accounts for only 5 percent of global production, representing a 70 percent decrease from $10 billion in 2000 to $3 billion in 2015, per the report. Meanwhile, almost half of global production comes from China. https://www.defensenews.com/pentagon/2019/06/27/here-are-the-biggest-weaknesses-in-americas-defense-sector/

  • US Army buys long-flying solar drones to watch over Pacific units

    30 octobre 2024 | International, Terrestre, C4ISR

    US Army buys long-flying solar drones to watch over Pacific units

    Kraus Hamdani Aerospace has won a Pentagon contract to provide K1000ULE solar-powered unmanned aircraft to the Army and Joint Special Operations Command.

  • Enhancing Unmanned Operations in Extreme Conditions with the Power of Two-Stroke

    9 juillet 2019 | International, Aérospatial

    Enhancing Unmanned Operations in Extreme Conditions with the Power of Two-Stroke

    Peter Lietz, Head of International Business Development for Hirth Engines, explains why engine manufacturers must raise the endurance bar for unmanned aerial vehicles (UAVs) to advance capabilities in extreme weather conditions. Drones have become a popular choice for various exploits, from hobbyist aerial photography to large organisations such as Amazon exploring the future of delivery services. In the same vein, governments, militaries and research groups are exploring the use of UAVs to enable highly effective monitoring of unforgiving terrains without risking manned aircraft or land-based patrols. The need for unmanned aerial systems to navigate harsh environments is vital for the maritime, military and commercial sectors. Providing reliable and to the minute information on the status of, and threats to, environments like the Arctic is crucial as governments prepare to take action against significant issues such as climate change and increases in populations. UAVs will play a crucial role in this future considering the need for operators to monitor harsh environments and difficult to reach terrains, especially rotary UAVs. Reaching inhospitable locations can present a variety of logistical challenges, not least of which is the cost of sending land-based patrols or manned aircraft often from navy ships or other maritime vessels. This is where UAVs can enable operators to safely monitor terrains in a cost-effective and efficient way to better understand complex habitats. Carrying out monitoring exercises in areas such as the Artic where there is a real risk to life can be a major challenge. Through the use of well-engineered rotary UAVs, organisations are able to perform a variety of tasks with ease. The responsibility to advance the endurance capabilities of UAVs falls on engine manufacturers. For this reason, we must continue to innovate to increase performance. Over the last few years, rotary UAVs have grown in complexity, not only in terms of the platforms themselves but also the robustness and performance of the engines they run on. As the operational requirements for UAVs grows, engine manufacturers must continually innovate to improve power-to-weight ratios, reduce emissions, and accelerate capabilities in harsh environments. For a long time, fixed-wing UAVs were considered the optimal choice for endurance and speed over their rotary counterparts. However, this is changing rapidly thanks to enhancements in engine design. Rotary UAVs are now becoming a platform of choice due to their reduced logistical footprint and the ability to take off and land in a confined or limited space, especially in maritime environments such as on-board navy ships and coastguard cutters for example. The requirement for rotary UAVs to operate in extreme temperatures such as the cold of the Arctic or the severe heat of warmer climates is essential for operators. This is where two-stroke propulsion engines play a vital role. Two-stroke applications present rotary UAV manufacturers with a range of benefits, including ease of maintenance due to less moving parts and the ability to operate on heavy fuels which are a must for corrosive marine environments. Alongside this, two-stroke powered rotary UAVs are often capable of flying missions with a full payload in extreme conditions for more than five hours without overhaul. With this as a backdrop, it is vital for UAV and engine manufacturers to accelerate the development of propulsion systems capable of operating in extreme locations around the globe. As the industry moves towards hybrid and electric propulsion new challenges will arise and it is crucial that OEMs raise the bar to power the next generation of UAVs. In order to advance the endurance and capabilities of rotary UAVs, engine manufactures must look to innovate the propulsion technology used. Electric is an increasingly popular option for commercial drones. However, electric comes with its own challenges and limitations, such as operational endurance and increased weight of the electrical motors. Considering the performance of batteries in extreme temperatures in comparison to their fuel-based counterparts, there is a long way to go before pure electric UAVs will be capable of flying extended missions in harsh terrains. Hybrid applications that utilise both a combustion engine and electric propulsion systems will provide a bridge toward the future of pure electric flight. A clear advantage for hybrid applications is improving power to weight ratios to enable increased payload capacities. Hybrid UAV applications can be used in various functions, such as: electrically powered take-off and landing with conventional engines powering horizontal flight; or powering flight using only electrical motors whilst the combustion engine acts solely as a generator. In addition, safety is a key purpose behind the pursuit of hybrid applications. For UAV manufacturers, having the ability to convert to an electric battery should the combustion engine fail could make all the difference in enabling a safe landing. Operating UAVs in extreme weather conditions reduces the chances of potential health and safety issues associated with deploying staff or manned systems into harsh environments. In addition, a further key benefit of using UAVs is enabling the deployment of cost-effective systems that perform safely in extreme locations. Ultimately, developing UAVs that can fly farther and for longer in harsh environments will require engine manufacturers to consider alternative fuel and power systems such as heavy fuel two-stroke applications. Heavy fuel is widely considered a must in the maritime industry when dealing with complex environments due to its resistance to extreme temperatures. At Hirth, pairing a robust heavy fuel combustion engine with electrical propulsion is something we are pursuing to advance the future capabilities of unmanned systems and bridge the gap to pure electric flight. For further information about Hirth's portfolio of engines, visit: http://hirthengines.com/ About Hirth Hirth Engines GmbH, based near Stuttgart, with global sales operated from Vienna, has a long pedigree in the development of propulsion systems, stretching back to The innovative company was founded by German aviation pioneer and World War I ace Helmuth Hirth, a student of US inventor Thomas Edison, and collaborator with the Wright Brothers and Zeppelin. The company has set its sights on consolidating its leading role in the development of two-stroke engines for a range of diverse sectors including:  Unmanned and manned light and experimental aircraft (fixed wing and helicopters)  Hovercraft Next generation R&D will focus on hybrid engines, based on the company's winning formula of providing easy to maintain power to weight ratio propulsion technology across civilian and military applications. https://dronescrunch.com/enhancing-unmanned-operations-in-extreme-conditions-with-the-power-of-two-stroke/

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