The Department of Defense wants ideas for a tiny autonomous space station

On the same subject

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  December 8, 2022 | International, Aerospace

  Production of Air Force’s next-gen training jet delayed to 2024

  Boeing expects the Air Force will order its first set of operational T-7A Red Hawk aircraft in 2024.

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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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  May 29, 2020 | International, Aerospace

  Comparative SWOT & Program Strategy Assessment of the World's Top 6 Western Combat Aircraft (4/4.5 Gen) Programs - Boeing, Lockheed Martin, Dassault, Eurofighter and SAAB - ResearchAndMarkets.com

  Combat jets have formed the core of the force structure of Air Forces globally since their advent in the piston engine powered form on to the battlefields during the World War I with technological evolution having heralded the age of jet powered combat aircrafts by the end of World War II with the usage of turbojet powered combat aircrafts by both sides towards the later part of the war. The radical shift in the prevailing, traditional rule based world order with the rapid build-up of military capabilities by China and resurgence of Russia on the world horizon having already propped up defense spending across most regions & parts of the world. Additionally, ongoing conflicts & unrest across some parts of the world, especially, the Middle East has also led to a spurt in defense spending over the recent years driving demand for western origin military hardware by most nations. The global defense spending reached the $1.9 trillion level for 2019, growing by over 3% year on year to reach its highest level since the Cold war era, accounting for around 2.2% of the world GDP for 2019. Fighter jets have remained a core focus area for nations around the world with their significant role & capabilities in aerial combat, interdiction, penetration of enemy air defenses, ground attack and air dominance/superiority roles. The 21st century has marked the mainstream shift towards the 5th generation aircrafts with the U.S. maintaining the lead as always, with its F-22 Raptor program in late 1990s and with the F-35 Lightning II in the 21st century, while similar 5th generation programs are being developed and produced by Russia, China & South Korea. The quest towards the development of 6th generation aircrafts, poised to enter service in the 2030s, has also begun, led by the European FCAS & the British Tempest programs. This report, however, focuses on the key fighter jet program from the perspective of competition for pursuit of international exports opportunities, which has mostly been led by 4 or 4.5 generation aircrafts so far with the same mostly aimed at capabilities expansion or fleet replacement. The study, thus, takes a close look at the Top 6 4/4.5 generation fighter jet programs currently in production from the international markets perspective with focus on comparative assessment of respective programs along with a comparative SWOT analysis on these programs which have on multiple occasions have come to face off each other in multiple international competitions over the recent years. The report provides a comprehensive, comparative analysis of the Strengths & Weaknesses of these combat jet programs relative to each other while scanning out environmental opportunities & threats for these in a rapidly evolving post COVID-19 world scenario (which is likely to see pressures on defense spending across most parts of the world over near term) which further enhances the relevance & usefulness of this report. https://www.businesswire.com/news/home/20200527005384/en/Comparative-SWOT-Program-Strategy-Assessment-Worlds-Top