Japanese Engineers Successfully Test Ramjet Engine for Mach‑5 Hypersonic Aircraft

Japanese engineers have successfully completed a ground combustion test of a ramjet engine designed for a Mach‑5 hypersonic aircraft, Hacker News reported. The test was conducted by JAXA in collaboration with Waseda University, the University of Tokyo, and Keio University at JAXA's Kakuda Space Center, where the engine reached 1,832°F, according to coverage on bsky. Both sources noted that this breakthrough could potentially reduce flight times between Japan and the US to approximately two hours.