The X-2 was a rocket-powered, swept-wing research aircraft developed jointly in 1945 by Bell Aircraft Corporation, the United States Army Air Forces and the National Advisory Committee for Aeronautics (NACA) to explore aerodynamic problems of supersonic flight and to expand the speed and altitude regimes obtained with the earlier X-1 series of ...

A tip-of-the-spear product geared for elite runners, the Rocket X 2 has been amplified with a hyper-focus on construction. We’ve remastered the geometry of our propulsive carbon fiber plate, sandwiching it between two layers of a brand-new, ultra-responsive, high-performance foam.

2014年2月28日 · The Bell X-2 was a rocket-powered, swept-wing research aircraft designed to investigate the structural effects of aerodynamic heating as well as stability and control effectiveness at high speeds and altitudes.

2023年3月11日 · 作为厚底碳板竞速鞋款，使用新中底的Rocket X2比前代更轻、缓冲更强、更具推进力，是一款合格的比赛用鞋，众多精英运动员选择并登上领奖台就是最好的证明。

2023年9月27日 · Hoka Rocket X 2 review: For years, Hoka enthusiasts have awaited the Rocket X 2, and it doesn't disappoint. Boasting an all-new, bouncy PEBA midsole, we are happy to confirm it delivers the same energy return as the world's best racing shoes.

2023年3月20日 · But that changes with the Hoka Rocket X2 – a technology-packed, race-day option to rival the big guns. The racer comes complete with a carbon-fibre plate, sandwiched between two layers of...

在碳板方面，Rocket X2 做了2个地方的设计：首先是前掌碳板的分离，这让前掌有一定的灵活性和舒适性。 其次是在足弓位置大幅度减少中底发泡材料，只靠碳板的支撑力和部分中底材料完成反弹。

X-2 was an AAF/ Bell project that flew three supersonic flight research aircraft, powered by liquid rockets. Originally designated XS-2. AKA: XS-2. Status: Operational 1948. The X-2 was the first swept-wing X rocketplane. It exceeded Mach 3, but in the course of doing so uncovered the supersonic aircraft problem of inertial coupling.

Info about the Bell X-2, the film Toward The Unknown, and Air Force test squadrons/info