Dedrone Provides UK With Protection Against Drone Terrorism and Threats

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  13 mars 2020 | International, Aérospatial

  America’s bomber force is too small and getting smaller

  By: Gen. John Michael Loh (ret.) America's bomber force is now in crisis. In the Air Force's fiscal 2021 budget request, one-third of the B-1 fleet is set for retirement, B-2 survivability modernization is canceled and the new B-21 is at least a decade away from contributing significantly to the bomber force. The venerable B-52 requires new engines and other upgrades to be effective. The number of bombers are at their lowest ever, but demand for bombers increases every year, particularly in the vast and most-stressed region of the Indo-Pacific. Bombers are the preferred weapon system there because of their long range and huge payload capacity. At the end of the Cold War in 1989 and just prior to the Gulf War in 1990, America had over 400 bombers. After these proposed cuts, there will be only 140. This decline is curious in light of recent Air Force declarations and testimony before Congress. In the document “The Air Force We Need,” Air Force leaders insisted last fall they need five more bomber squadrons — about 65 more bombers. Just last month, the Air Force chief of staff testified that the need is for “200 bombers, of which 145 would be B-21s.” These numbers have been validated by think tanks such as MITRE Corp., the Center for Strategic and Budgetary Assessments, Rand, and the Mitchell Institute. In today's global threat picture, bombers become the coin of the realm. Bombers have dual strategic roles. They provide flexible deterrence with their nuclear capability, forcing adversaries to think twice before starting an attack. Bombers also carry the brunt of conventional operations. In our wars in the Middle East, the B-1s, B-2s and B-52s have all played central roles attacking fixed targets and in close-air support of ground troops. Their long range and on-station times, combined with huge weapons loads, make them the weapon of choice for combatant commanders in both the Middle East and Pacific regions. A single B-2 can carry and launch 80 precision-guided weapons, each assigned a different target, and can penetrate contested airspace. The B-1s and the B-52s have similar direct-attack capabilities plus the ability to carry and launch cruise missiles from standoff ranges. No other weapon system, in the air or on the sea, can come close to this massive firepower. The need for more bombers is increasing. Whether facing nonstate actors like ISIS, mid-tier threats like North Korea and Iran, or peer threats such as China and Russia, the ability to strike targets quickly and in large numbers is crucial. This flexibility was vividly demonstrated in the first three months of Operation Enduring Freedom after 9/11. Bombers flew 20 percent of all sorties, but dropped 76 percent of the munition tonnage. Despite those who thought bombers were only useful in long-range nuclear or strategic missions, the reality is that a wide variety of combat missions are simply impossible to execute without bombers. But bombers and their crews are worn thin. The Air Force bought 100 B-1s in the 1980s. When demand for them surged post 9/11, the Air Force retired 30 B-1s to free up funding to sustain the remaining force. This, combined with earlier divestitures, saw the Air Force fly 61 B-1s relentlessly for nearly 20 years. The fleet was in such bad shape in 2019 that mission-capability rates were less than 10 percent. The Air Force's request to retire a further 17 B-1s to boost the health of the remaining fleet looks like a repeat of the last B-1 retirements. Among the 140 bombers that remain, only the 20 stealthy B-2s have the ability to penetrate modern air defenses to strike critical targets — a priority of the National Defense Strategy. Yet the FY21 budget request cancels the B-2's Defensive Management System Modernization program and puts our only operational stealth bomber on a path to early retirement. Given the unmet demand for penetrating platforms and the time it will take for the B-21 to be delivered in numbers, halting modernization of the 20 stealth bombers we have today is risky. Finally, the 78 B-52Hs are planned to be re-engined in the years ahead. New, fuel-efficient and more reliable engines should increase their life and capability. The ultimate cost of this modification is not known. One of the unknowns is the extent of corrosive structural and wiring problems that will inevitably emerge when each B-52 is unbuttoned. Discovery of such problems is not new. When the Air Force upgraded its C-5M fleet with new engines, the Air Force had to retire the older C-5A fleet to pay for unknown repairs. Even if the B-52 re-engining goes smoothly, a significant portion of the force will be unavailable as each moves through the depot for modifications. Last year Congress increased funding for the F-35 fighter and added funds for unrequested F-15EX procurement. Now is the time for Congress to restore funding for existing bombers to avoid this shortfall in a most vital component of our nation's defense. The Air Force entered the new decade with the smallest bomber force in its history, and the FY21 budget request erodes it further. There comes a point where doing more with less does not work, especially with B-21s not available in numbers for several years. It is time to recognize the gravity of the situation and build up the nation's bomber force. A good “plan B” does not exist without bombers. Gen. John Michael Loh is a former U.S. Air Force vice chief of staff and had served as the commander of Air Combat Command. https://www.defensenews.com/opinion/commentary/2020/03/12/americas-bomber-force-is-too-small-and-getting-smaller/

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  14 août 2019 | International, Aérospatial

  Precooler Technology Could Bring Advantages To Fighter Engines

  By Tony Osborne Technology developed by Britain's Reaction Engines for its SABRE (Synergistic Air-Breathing Rocket Engine) hypersonic powerplant is to be fitted on the Eurojet EJ200 engine from a Eurofighter Typhoon to understand if the technology can help transform the powerplant's operating envelope. The £10 million ($12 million) project announced by the Royal Air Force (RAF) Rapid Capability Office (RCO) in July will see BAE Systems, Reaction Engines and Rolls-Royce engineers work to better comprehend Reaction's precooler technology and how it could be integrated for use on a jet engine—perhaps even the powerplant for Britain's future combat aircraft, the Tempest. Two-year project will scope integration to better understand precooler potential benefits Heat exchanger is an enabler for Reaction Engines' SABRE technology The trials represent the first acknowledged application of the precooler technology At high speed, jet engines struggle with a thermal challenge as air entering the intake becomes too hot, reducing thrust and limiting the ability to reach speeds beyond Mach 3. Reaction's precooler, essentially a highly efficient heat exchanger, already has proven its ability to quench megawatts of heat energy from the incoming air. Trials in the U.S. have shown the precooler technology to cool intake airflow from more than 800F (426C) to around 212F in just 1/20th of a second, helping to maximize performance. Applied to a fighter engine, the precooler could allow it to work more efficiently at high speeds but also enable manufacturers to be less reliant on exotic, expensive and heat-resistant materials such as titanium. This could lead to lower costs in terms of purchase and maintenance, which are both key focuses of Britain's Future Combat Air System Technology Initiative (FCAS TI). The goal of the FCAS TI is to research and develop new technologies that can be spiraled into Britain's Eurofighter Typhoons and Lockheed Martin F-35s, but also potentially featured in a combat aircraft to replace the Typhoon in the 2030s. “This is Phase 1 of something more,” Air Vice Marshal, Simon “Rocky” Rochelle, chief of staff for capability and the brainchild behind the RAF's RCO, said at the Royal International Air Tattoo, where the contract was signed. “There is something here that needs to be explored, investigated, tested and tried.” Over the next two years, engineers will study how the precooler can be integrated onto the EJ200. Once this is established, the engine and precooler will be ground-tested together. “This isn't about a new market for EJ200. We are using existing assets to try and address that heat challenge,” Conrad Banks, Rolls-Royce's chief engineer for future defense programs, tells Aviation Week. “If you can cool the intake air down, suddenly you can expand the flight envelope of your gas turbine and it introduces some exciting supersonic and hypersonic applications.” There is no suggestion the UK is looking for a hypersonic fighter, especially with the high costs associated with the airframe alone. Nonetheless, the technology could enable higher supercruise performance—sustained supersonic flight without the use of afterburner, or more simply better fuel economy. “What we will do on the testbed is assess the drop in temperature and then see how that affects the core of the engine, that then validates our model. . . . This is not about massively changing the engine,” Banks explains. How the precooler could be fitted to the engine is also part of the scope of the study. One option could be a donut-like configuration around the intake, Banks suggests. The work also will consider how the introduction of a precooler affects the rest of the airframe and whether such an installation is affordable. The precooler fitted to the EJ200 will be “designed and scaled to the engine to match its performance,” says Banks. As Banks describes it, the technology will not change the low-observability aspects of the platform such as the engine's infrared signature, pointing out that will depend on what is done on the back end of the engine. However, officials note such a heat exchanger also could be mounted to the rear of the engine. For Reaction Engines, the trials build on its lightweight heat exchanger (HTX) experiments, which were conducted in Colorado and used a J79 engine from an F-4 Phantom to feed the precooler. The technology is key to the company's SABRE concept, which is targeted at air-breathing hypersonic and space access vehicles. In this role, the engine is designed to efficiently extract oxygen from the atmosphere for rocket combustion. In the fully integrated SABRE, the chilled air will be passed from the HTX to a turbo-compressor and into the rocket thrust chamber, where it will be burned with sub-cooled liquid hydrogen fuel. Reaction Engines has raised over £100 million in the last three years from public and private sources. In addition, the UK government in 2013 announced a £60 million commitment to assist with the demonstrator engines. Strategic investments also have been made at BAE Systems in 2015 and more recently in 2018 by Rolls-Royce and by Boeing's capital venture arm, HorizonX. https://aviationweek.com/defense/precooler-technology-could-bring-advantages-fighter-engines

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  22 juillet 2020 | International, Naval

  ST Engineering and IAI Set Up JV to Market Advanced Naval Missile Systems

  July 16, 2020 - Singapore Technologies Engineering Ltd (ST Engineering) today announced that its land systems arm has signed an agreement with Israel Aerospace Industries Ltd (IAI) to set up a joint venture company (JV) in Singapore. ST Engineering and IAI shall each hold a 50% share of the JV. The JV, named Proteus Advanced Systems Pte Ltd, will leverage the strengths and track record of its parent companies to market and sell advanced naval missile systems, including a next generation anti-ship missile system. The setup of this JV is not expected to have any material impact on the consolidated net tangible assets per share and earnings per share of ST Engineering for the current financial year. ST Engineering is a global technology, defence and engineering group specialising in the aerospace, electronics, land systems and marine sectors. The Group employs about 22,000 people across offices in Asia, the Americas, Europe and the Middle East, serving customers in the defence, government and commercial segments in more than 100 countries. With more than 500 smart city projects across 70 cities in its track record, the Group continues to help transform cities through its suite of Smart Mobility, Smart Security and Smart Environment solutions. Headquartered in Singapore, ST Engineering reported revenue of $6.7b in FY2018 and it ranks among the largest companies listed on the Singapore Exchange. It is a component stock of the FTSE Straits Times Index, MSCI Singapore, SGX ESG Transparency Index and SGX ESG Leaders Index. For more information, visit stengg.com. View source version on Israel Aerospace Industries Ltd (IAI): https://www.iai.co.il/st-engineering-and-iai-advanced-naval-missile-systems