#hypersonique

  • Scary Fast
    https://publicintegrity.org/national-security/future-of-warfare/hypersonic-weapons-race

    Griffin was referring to a revolutionary new type of weapon, one that would have the unprecedented ability to maneuver and then to strike almost any target in the world within a matter of minutes. Capable of traveling at more than 15 times the speed of sound, hypersonic missiles arrive at their targets in a blinding, destructive flash, before any sonic booms or other meaningful warning. So far, there are no surefire defenses. Fast, effective, precise and unstoppable — these are rare but highly desired characteristics on the modern battlefield. And the missiles are being developed not only by the United States but also by China, Russia and other countries.

    [...] In 2018, Congress expressed its consensus in a law requiring that an American hypersonic weapon be operational by October 2022. This year, the Trump administration’s proposed defense budget included $2.6 billion for hypersonics, and national security industry experts project that the annual budget will reach $5 billion by the middle of the next decade. The immediate aim is to create two deployable systems within three years. Key funding is likely to be approved this summer. Griffin has spoken about America eventually having an arsenal of “a couple of thousand prompt strike missiles.”

    [...] Development of #hypersonics is moving so quickly, however, that it threatens to outpace any real discussion about the potential perils of such weapons, including how they may disrupt efforts to avoid accidental conflict, especially during crises. There are currently no international agreements on how or when hypersonic missiles can be used, nor are there any plans between any countries to start those discussions. Instead, the rush to possess weapons of incredible speed and maneuverability has pushed the United States into a new arms race with Russia and China — one that could, some experts worry, upend existing norms of deterrence and renew Cold War-era tensions.

  • Magnétohydrodynamique
    http://www.dedefensa.org/article/magnetohydrodynamique

    Magnétohydrodynamique

    L’annonce officielle des nouveaux systèmes d’armes russes est une révolution silencieuse dont on n’a pas fini d’apprécier les implications. Pour l’instant l’aspect technologique a été très peu commenté. Il le mériterait bien : à l’heure actuelle il n’existe pas de technique officiellement répertoriée pour faire voler un aéronef à plus de Mach 5.

    Soit Vladimir Poutine a menti, soit il a donné le coup d’envoi d’une nouvelle révolution industrielle.

    Rappelons qu’à une vitesse supérieure à celle du son, l’échauffement des points de la voilure où se forme l’onde de choc augmente avec le carré du nombre de Mach. À 5.000 km/h, c’est à dire à Mach 5, on atteint les 1000°c, température à laquelle tous les matériaux perdent leur (...)