Another similar thing from the end of last year: https://www.geaerospace.com/news/press-releases/other-news-information/ge-aerospace-demonstrates-hypersonic-du

Another similar thing from the end of last year: https://www.geaerospace.com/news/press-releases/other-news-information/ge-aerospace-demonstrates-hypersonic-dual-mode-ramjet https://www.geaerospace.com/news/press-releases/other-news-i... They really seem to love to talk about how fast they move except wait: https://www.geaerospace.com/news/articles/100-year-anniversary-technology/century-innovation-where-will-next-100-take-us https://www.geaerospace.com/news/articles/100-year-anniversa... Per the above in 2019 they had been developing RDE technology for 5 years. Now developing the tech is different then building a prototype but it's good to take these timetable numbers with a large dose of salt. It is interesting to see RDE's getting alot of headlines recently. Really cool tech that works off of a principle known for a long time but only just recently hitting an inflection point in terms of development. Cool video from Scott Manly talking about RDE's: https://www.youtube.com/watch?v=rG_Eh0J_4_s https://www.youtube.com/watch?v=rG_Eh0J_4_s