Israel’s Technion Institute founded the Center for High-Speed Flight at the Technion in 2023. It combines materials science and engineering, mechanical engineering, chemical engineering, and physics. It is building wind tunnels that can heat air to 9,000 deg F and fuels that generate energy and cooling.

https://technionuk.org/news-post/propelling-the-future-the-possibilities-of-high-speed-flight/