CACI Awarded $199 Million Contract to Support U.S. Navy Satellite Systems and Networks for Special Operations

On the same subject

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  February 23, 2023 | International, Aerospace

  Boeing will close Super Hornet production line in 2025

  Boeing will close its Super Hornet production line in 2025, or 2027 if India selects the jet, after 30 years of building F/A-18E-Fs in St. Louis.

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  July 9, 2019 | International, Aerospace

  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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  January 30, 2020 | International, C4ISR

  Chinese threats means the Pentagon needs new C4ISR systems

  By: Chiara Vercellone For the United States to meet the goals laid out in the National Defense Strategy, especially in Asia, and to realize President Donald Trump's vision of an open Indo-Pacific, the Department of Defense's battlefield technology must undergo significant changes, according to a Center for a New American Security report released Jan. 28. The report, an independent assessment mandated by Congress in the 2019 National Defense Authorization Act, proposed the revamping of C4ISR systems as they remain “brittle in the face of Chinese cyberattacks, electronic warfare and long-range strikes.” The Pentagon's C4ISR capabilities have fallen behind technologically, as they were developed “in an era when competitors or adversaries could not attack U.S. assets in space or at long ranges,” the report found. At the same time, a 2019 Department of Defense's report on China's military and security developments found that country has prioritized military capabilities with disruptive potential, including hypersonic weapons, counterspace capabilities, artificial intelligence and C4ISR advanced robotics. Thus far, the Department of Defense has been able to develop countermeasures against China's abilities, said Chris Dougherty, a senior fellow at CNAS and one of the authors of the report. “As the threat continues to get more sophisticated, these [countermeasures] will likely lose their effectiveness,” Dougherty said. “This necessitates building a new architecture that is designed around resiliency, kill webs, and graceful degradation.” While under attack, U.S. systems sometimes fail to have any connectivity and have sporadic dial-up speeds. Instead, they should still have some level of communication even while the attack is going on, even if this means at lower bandwidths. To strengthen its systems, the report recommended, the U.S. military should develop space capabilities resistant to kinetic attacks, synthetic training environments for U.S. forces to practice C4ISR operations, systems that can transmit data via multiple pathways and surveillance systems that can avoid being detected. A recent project by RAND found that, while the Department of Defense maintains an advantage in airspace penetration capabilities, it remains vulnerable to air base attacks and Chinese anti-surface warfare. An initial system with these developments could be in place in the next decade if the Department of Defense and armed services create a basic system and improve it over time, Dougherty said. “If, as we have done in the past, we wait around for a ‘perfect' set of requirements to develop an ‘objective' future system, we could see this take 15-20 years, at which point China will likely have far surpassed us in this competition,” he said. https://www.c4isrnet.com/newsletters/daily-brief/2020/01/29/chinese-threats-means-the-pentagon-needs-new-c4isr-systems/