Défense européenne : entretien avec Wolfgang Schäuble et Sylvie Goulard

Sur le même sujet

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  11 février 2020 | International, Aérospatial, Naval

  U.S. Navy’s Aircraft Launch Rail Gun Revealed

  Guy Norris Details of the U.S. Navy's new generation, electrically powered aircraft launch and recovery system, currently under test for the first time on the USS Gerald R. Ford (CVN-78) carrier, are visible in a large-scale model at the Singapore Airshow. The Electromagnetic Aircraft Launch System (EMALS) is in development to replace the traditional steam piston catapult launch system on current carriers. The new configuration also includes the electrically powered Advanced Arresting Gear (AAG), which replaces the hydraulic arresting gear in use on the Navy's 10 Nimitz-class aircraft carriers. The EMALS catapult, which is powered by a linear induction motor, is designed to accelerate aircraft more gradually than the steam system and put less stress on the aircraft. The system is also lighter and more flexible than the current design and is capable of launching a wider range of aircraft weights. The AAG is also designed for a broader range of aircraft, including UAVs. The large-scale cutaway model shows the linear induction motors of the EMALs as well as the banks of rotary engines incorporated in the AAG. Fine control of the arresting forces is provided by a large induction motor, which is coupled to energy-absorbing water turbines. Tests on the Ford, the eponymous lead ship of navy's first new class of carriers since the 1970s, are part of efforts to assess the performance of the technology for launch and landing operations. The system has proved more challenging to develop than expected, and improvements are underway to boost reliability for the required sortie generation rate. The service is evaluating aircraft compatibility before the scheduled deployment of the Ford in 2022. https://aviationweek.com/shownews/singapore-airshow/us-navys-aircraft-launch-rail-gun-revealed

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  18 mai 2021 | International, Aérospatial, Naval, Terrestre, C4ISR, Sécurité

  Contracts for May 17, 2021

  Today

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  25 juin 2019 | International, Naval

  Leidos awarded $72.8M for Navy's TRAPS sub detection system

  By Ed Adamczyk June 24 (UPI) -- Leidos Inc. was awarded a $72.8 million contract for work on submarine detection sonar for the U.S. Navy, the Defense Department announced. The company, based in Reston, Va., will perform work on the Transformational Reliable Acoustic Path System, or TRAPS, one of two prototypes developed by the Defense Advanced Research Projects Agency, the Defense Department agency responsible for the development of emerging technologies military applications. Leidos' Leidos' work on TRAPS comes under an indefinite quantity, cost-plus-fixed-fee contract with a three-year ordering period and no options, the Defense Department announced on Friday. The TRAPS system uses a fixed sonar mode placed on the ocean floor, exploiting advantages of operating from the seafloor, to achieve large-area surveillance of the area surrounding the submarine. Each node communicates back to a floating "stationary surface node" through a wireless acoustic modem when the ocean floor node detects a sound. The other prototype, called Submarine Hold at Risk [SHARK], has an unmanned underwater vehicle as a mobile platform to track enemy submarines. Both are part of DARPA's Distributed Agile Submarine Hunting [DASH] program. Leidos' work on the contract will be done at the company's Long Beach, Miss., facility, with an expected completion date of June 2022. https://www.upi.com/Defense-News/2019/06/24/Leidos-awarded-728M-for-Navys-TRAPS-sub-detection-system/9201561393132/