Sr-71 used a turboramjet engines. This field seems to be pretty highly explored.They are working on PDEs? I believe the only aircraft to do that for few seconds was SR71. That is interesting indeed.
See by not going for fgfa we have delayed the induction of 5th gen jet by ten yrs, earliear it was around 2021-22 now it will happen arount 2032. But at the same time it has given our own aerospace industry time to grow and mature to a certain extent, which is very cruicial.
Even the Russians does not have the final ultimate spec version yet. The production is abysmal.
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