12 février 2024 | International, Sécurité

ANALYSIS | Trump's NATO comments aren't cause for panic — but they should be taken seriously, experts warn | CBC News

There was a "keep calm and carry on" atmosphere outside the House of Commons on Monday as a political storm blew up over Donald Trump's threat to encourage Russia “to do whatever the hell they want” to NATO members he thinks aren't paying their fair share of the cost of collective defence.


Sur le même sujet

  • Army Revs Up High-Tech Tank Engine

    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

  • This training tool could be the answer to stop mass cyberattacks

    9 juillet 2020 | International, C4ISR, Sécurité

    This training tool could be the answer to stop mass cyberattacks

    Mark Pomerleau At air bases across Europe, networks are under attack. Malicious hackers have gained access to sensitive systems, information, controls and critical infrastructure. But cyber operators from U.S. Cyber Command, in concert with Five Eyes partners, have been called in to thwart these attempts in real time. This was the main scenario for this year's capstone cyber training exercise put on by Cyber Command, Cyber Flag 20-2. The exercise, which took place June 15-26 and was exclusively defensive in nature, saw more than 500 participants and 17 teams participating from five countries across nine time zones, and it included America's National Guard, the U.S. Energy Department and the Five Eyes alliance — Australia, Britain, Canada, New Zealand and the U.S. Australia, however, did not participate during this iteration. Officials told reporters this week that the purpose of Cyber Flag 20-2 was to continue building the community of defensive cyber operations and to improve the overall capability of the Five Eyes countries to defend against cyber aggressors. The drill involved teams defending IT and operational security networks against a live, opposing force trying to disrupt, deny and degrade the air bases' operations. The networks under attack were industrial control systems simulated to generate network traffic for an aviation fuel farm, power grid, air traffic control radars and electronic access control systems. The attacks came in the form of malware that targeted devices responsible for fuel and power. But the unique aspect of this year's exercise, as C4ISRNET previously reported, was the use of a new remote cyber training tool called the Persistent Cyber Training Environment. PCTE is an online client that allows Cyber Command's cyber warriors, as well as partner nations, to log on from anywhere in the world to conduct individual or collective cyber training as well as mission rehearsal, which to date had not existed for the cyber force as it does for physical troops. The program is run by the Army on behalf of the joint cyber force. The platform not only allowed the exercise to continue as planned amid the coronavirus pandemic, but it enabled collaboration and simultaneous training across the world. A new way to train Officials say PCTE is providing Cyber Command with an entirely new way to train cyber forces, which previously was difficult given a lack of infrastructure and the time needed to set up ranges and scenarios. It also allows Cyber Command and military units to conduct more frequent training. Cyber Flag typically was Cyber Command's largest and only holistic tactical training event, held annually during June. For units, aside from Cyber Flag, there were no other ways to stay sharp on their skills unless they built their own environments. Now, Cyber Command plans to hold more exercises, with Cyber Flag 20-3 occurring in the fall. “The delivery of the Persistent Cyber Training Environment absolutely allows us to increase the frequency and the complexity of exercises that are conducted by the command itself,” Coast Guard Rear Adm. John Mauger, director of exercises and training at Cyber Command, told reporters. “Going forward, I would expect you to see a series of exercises throughout the year where we are reaching out to the different teams to test their capabilities or to focus on specific issues that are of concern or interest to us. “Going forward, we're going to get the benefits of both those distributed exercises along with increasingly complex exercises as PCTE is instantiated across both the secret network and the top-secret network.” Scenarios and environments can be stored, saved, reused and modified if needed in the system for later exercises. Smaller units will also be able to leverage these scenarios to practice whenever needed. The PCTE virtual environment for this year's exercise included 25 interconnected ranges of more than 3,000 virtual machines — a high-fidelity network that simulated and emulated open internet traffic with more than 4,000 static websites that store and share data. The simulated air base networks created in PCTE had fully configured Windows active directory domains with over 100 nodes running more than 10 types of major operating systems, along with 35 simulated user control workstations actively surfing the internet and using Microsoft Office products to access, create and transfer files. Moreover, officials also explained PCTE can be integrated into larger, multi-combatant command-type exercises to simulate the cyber effects, such as Global Lightning and its companion Cyber Lightning. Global Lightning is an annual global exercise run by Strategic Command to test integration across several geographic and functional combatant commands. Cyber Lightning is Cyber Command's portion to the exercise. “We think that is the next evolution of the Persistent Cyber Training Environment and how we take to the tier 1 exercises, incorporate cyber effects. They're no longer white-carded,” Col. Tanya Trout, Cyber Command's PCTE director and acting director of the Joint Cyber Training Enterprise, told reporters. White carding involves telling exercise participants that a certain action has occurred. This was typical of cyber effects, given it was difficult to realistically simulate them, which diminished the training value in exercises because participants didn't experience the full breadth of these actions. Now, these activities can play a real role in exercises increasing the overall fidelity of training across the joint force and continuity of all operations of warfare. The system will also be able to be used for mission rehearsals. A Cyber Command official said the force can input prior operations, such as those used against the Islamic State group, to train against. Additionally, they'll be able to upload to the platform malware discovered in operations. The PCTE program office, which is in the prototyping phase despite delivering the first portion to Cyber Command in February 2020, also learned valuable lessons in Cyber Flag. Officials said the two-week exercise provided the program office with six months' worth of data it can use to make significant improvements. Prior to the February delivery, the program office leveraged several smaller-scale training events at the unit level to incrementally increase capabilities and scalability as well as help geographically dispersed teams prepare for tier 1 exercises like Cyber Flag. Overall, officials are happy with how the system performed in its first tier 1 exercise, pointing to little to no latency issues, though there were periodic improvement tickets. “What we found through the rapid development and use of the Persistent Cyber Training Environment is that we really have a unique capability to move forward with,” Mauger said. https://www.c4isrnet.com/dod/cybercom/2020/06/25/this-training-tool-could-be-the-answer-to-stop-mass-cyberattacks

  • Bell pitches Viper attack helo to replace Japan’s Cobra copters

    29 novembre 2018 | International, Aérospatial

    Bell pitches Viper attack helo to replace Japan’s Cobra copters

    By: Mike Yeo TOKYO — American company Bell is promoting its AH-1Z Viper attack helicopter at the Japan International Aerospace Exhibition in Tokyo as its entrant for Japan's attack helicopter replacement program. The East Asian U.S. ally is seeking a new helicopter to replace the approximately 70 Bell AH-1S Cobra helos currently in use by the Japan Ground Self-Defense Force. The country had released a request for information in May seeking a new helicopter. Speaking to Defense News at the show, retired Lt. Gen. George Trautman, a former U.S. Marine aviator and commander of all Marine Corps aviation who now works as an adviser for Bell, said the company responded to the RFI through the U.S. government with 50 AH-1Z helicopters. John Woodbury, Bell's director of global military business development in the Asia-Pacific region, added that the RFI called for an attack helicopter with “marinization and shipboard compatibility,” with Trautman asserting that the AH-1Z can “operate onboard ships far better than the competition.” The representatives from Bell said there's more to marinization than additional corrosion protection from saltwater. They said this also includes foldable rotor blades and other measures that reduce the stowage footprint onboard the limited space on ships, as well as a design that minimizes electromagnetic interference. The requirement for the new attack helicopter to operate from ships suggests Japan plans to use them on Izumo-class helicopter destroyers or the smaller Hyuga-class of the Japan Maritime Self-Defense Force, which are equipped with a long flight deck to operate multiple helicopters. Japan will likely require at least a degree of technology transfer and local production for the new helicopters. Bell's relationship with Japan reaches across 65 years, including the company's partnership with Fuji Heavy Industries (now Subaru) for production of Japan's AH-1S helicopters. https://www.defensenews.com/digital-show-dailies/japan-aerospace/2018/11/28/bell-pitches-viper-attack-helo-to-replace-japans-cobra-copters

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