Air Force rolls out Advanced Battle Management System devices in COVID-19 fight

Sur le même sujet

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  29 avril 2019 | International, Naval

  China’s latest class of warship makes its public debut

  By: Mike Yeo MELBOURNE, Australia – the first of a new class of guided missile destroyer from China made an appearance at a naval review to mark the 70th Anniversary of the country's navy. The Type 055 destroyer, named the Nanchang, was among several ships of the People's Liberation Army Navy or PLAN that took part in the naval review held off the northern Chinese city of Qingdao with Chinese President Xi Jinping in attendance. China's first aircraft carrier Liaoning, a refurbished Soviet-era ship, was also in attendance along with 18 warships from 13 other nations including Australia, India and Japan. The United States declined an invitation to send its ships to the naval review, and France was disinvited after its frigate Vendémiaire sailed through the Taiwan Straits prior to the event, Reuters reported. The Nanchang was launched at Shanghai's Jiangnan Changxin shipyard in June 2017. The Type 055, which is classed as a cruiser by the Pentagon, measures almost 590 feet and displaces 10,000 tons according to specifications released by China — although some naval analysts believe that figure is an underestimation. Each ship is also equipped with a total of 112 vertical launch cells that are capable of launching either surface-to-air or anti-ship missiles, and fitted with a modern sensor suite that includes phased array radars. Speaking at a regular press briefing conducted by China's Ministry National Defense on Thursday, Senior Col. Ren Guoqiang confirmed that the Nanchang is on the verge of completing sea trials and will be officially handed over to the PLAN later this year. In addition to the Nanchang, recent open-source satellite and aerial imagery show that seven other Type 055s are in various states of construction and fitting out at the two major Chinese naval shipyards in Shanghai and Dalian. The latter is also where China's first domestically-built carrier, which is based closely on the Liaoning, is currently being completed. Further underscoring the astonishing pace of China's ongoing naval buildup, the photos also show five other smaller Type 052D destroyers undergoing construction at Dalian with six more being built at Shanghai. The latter shipyard has four more destroyers of an unknown sub-type being put together, along with what are reportedly the modules for China's third and largest aircraft carrier. https://www.defensenews.com/global/asia-pacific/2019/04/26/chinas-latest-class-of-warship-makes-its-public-debut/

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  6 décembre 2023 | International, Aérospatial

  Safran weighs protest against Rome's defence deal veto | Reuters

  France's Safran does not exclude a protest against Italy's decision to block part of its planned $1.8 billion purchase of the flight control systems business of Collins Aerospace , Chief Executive Olivier Andries said.

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  13 décembre 2019 | International, Terrestre

  Army Revs Up High-Tech Tank Engine

  By SYDNEY J. FREEDBERG JR. WASHINGTON: Just outside Detroit, home of the muscle car, the Army's put together a powertrain as potent as three Trans Ams strapped together — with an electric stealth mode that sounds more like a lawnmower than a tank. The 1,000-horsepower Advanced Powertrain Demonstrator packs more diesel horsepower in less space than current engines, along with a 160-kilowatt generator that can power advanced electronics – like a drone-killing laser or anti-missile defenses – and even move an entire 50-ton vehicle for brief periods. Now installed in an M2 Bradley hull for testing, the current version of the APD can move war machines up to 50 tons, but it's meant to be easily modified for larger or smaller vehicles. “Each of the pieces can be scaled” up or down, said John Tasdemir, chief of the power & mobility branch of the Army's Ground Vehicle Systems Center (formerly TARDEC) in Warren, Mich. “It could not just fit a Bradley, it could fit a future vehicle, [or] it could fit a legacy vehicle as well.” Compact enough to fit into the notoriously cramped Bradley, the 1,000-horsepower Advanced Powertrain Demonstrator produces 48 percent more horsepower than the most-upgraded Bradley variant and 67 percent more than the standard 600-hp model. The engine could also fit the turretless utility variant of the Bradley, the Armored Multi-Purpose Vehicle, or, with some rearrangement of the components, the M109A7 Paladin howitzer. And since the design is modular, the APD could be scaled down to 500 hp – potentially powering the more tank-like of the Robotic Combat Vehicles the Army's now developing – or up to 1,500 hp – enough to drive the 70-ton M1 Abrams main battle tank. Another logical candidate for APD technology is the Optionally Manned Fighting Vehicle now in development to replace the Bradley. Fitting the new vehicle would require some redesign, said one of Tasdemir's engineers, Mike Claus, but if they could optimize the APD components for an all-new hull without the awkward compromises of the Bradley, the resulting design could be “way more compact.” How It Works Why is it important to be compact? Well, the heaviest part of a combat vehicle is its armor. The weight of the armor, in turn, is the product of its thickness and the surface area it has to protect. The bulkier you make your vehicle – the greater the “volume under armor,” in Army terms – the more tons of armor you need to get the same level of protection. To make the APD more compact, it needs to be more efficient. To do that, the Army and its contractors went to work on every piece of the powertrain – for example: In the diesel engine itself, built by Cummins, the pistons go through a two-stroke cycle instead of the usual four, allowing them to generate more horsepower with less waste heat from the same amount of gas. Historically, two-stroke engines are also highly polluting, which is why they've not been widely adopted, but the APD uses cutting-edge emissions controls. The SAPA drive-by-wire transmission replaces traditional, inefficient mechanisms like pumps with precisely engineered electromagnetic controls called solenoids. The transmission is in fact so attractive to other Army programs that they're considering installing it even without the rest of the APD powertrain. The cooling system replaces traditional filters – which wear out in 20 hours in dusty areas like deserts – with a Donaldson pulse-jet air cleaner that lasts 500 hours and provides much more airflow. Cooling armored vehicles is always challenging, even when they're not fighting in the desert, because they're basically metal boxes in which you want to punch as few holes as possible. The L3-Harris Integrated Starter-Generator produces 160 kW – many times the current alternator on the Bradley – but doesn't require its own dedicated cooling system, unlike traditional electronics. That's because it uses heat-resistant silicon carbide components that can function at 105 centigrade (hot enough to boil water), the same as the engine block. That electrical power is as important for modern combat vehicles as diesel horsepower. During the Iraq War, the Cold War-vintage Bradleys got upgraded with so many advanced sensors, communications networks, display screens, and radio jammers to deactivate roadside bombs that they couldn't power everything at once. Now, worried about Russia's vast arsenal of RPGs and anti-tank missiles, the Army is pushing to install so-called Active Protection Systems on its armored vehicles, which use compact radars to track incoming projectiles – a big power drain – so miniature missile launchers can shoot them down. And for the near future, the Army is highly interested in high-powered laser and microwave weapons, albeit primarily against fast-moving, fragile targets like drones and rockets rather than heavily armored vehicles like tanks. The Ground Vehicle Systems Center plans to test the APD powertrain on a stationary Bradley hull through this coming March, by which point they expect to have demonstrated what's called Technological Readiness Level (TRL) 6. Then they'll fully integrate the APD into a drivable Bradley, the Advanced Mobility Experimental Prototype (AMEP), which will be tested to TRL 7 or 8 – the highest level possible for a prototype – in 2022. The next year, 2023, the Army will hold the final competition to build the Bradley replacement, the OMFV. https://breakingdefense.com/2019/12/army-revs-high-tech-tank-engine