High altitude isn't the yippee this guy thinks it is, when the horizon can't save your ass from getting lit up by a monster radar. If you want a hypersonic fighter, it's more economical to just fire a longer ranged hypersonic missile or forward/stage assets closer to target. The MiG-41 is pure snake oil right now. GCAP's project goals have been scrapped and rewritten so many times, it's hard to say if it'll even get made. Knowing Japan, they'll skedaddle soon enough citing cost overruns, maybe get an engine from US and go with their own design. I have no retort for this guy's chinese space fighter, other than we should ask the Japanese for help.
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Having different opinion, thinking about far future is not a problem, but it should be based on some tech foundation & time constraint.
But problem with this guy is that just like Transformer, he has tried to transform every thread, derailed every thread doing this piggybacking propaganda that -
- IAF doesn't need 6gen jet, so no need to join GCAP, FCAS or make our own.
- But AMCA with just 4 BVR-AAMs is fine till 2070s. CATS will do the rest.
- IAF should wait for Russia to roll out MiG-41, get few squads of them,
- After that in 2050s IAF should design 7gen Hypersonic near space or space fighter.
The world doesn't even have any outline of 7gen when trying to understand 6gen fully.
About Turbofan/Turbojet, even VCE, we can talk about its parameters like OPR, BPR, TET, air mass flow, SFC, fuel tank capacity, etc.
But for SCRamjet we common citizens don't know any parameter.
The studies on hypersonics have been going on but mostly top secret, only some diagrams, animations.
X-15 is the only known manned HySo aircraft, that too rocket powered, not jet powered.
USA wanted to make something out of X-30 NASP but couldn't.
1990s rumors like Aurora, SR-91, XR-7, etc have remained rumors till today.
SR-72 Darkstar exists only in movie, videogames, animations.
SR-71 Blackbird & its attack version A-12 with AAMs in IWBs, needed big body with big fuel tanks & AAR. A HySo jet imagined with IWB will also need massive fuel & AAR.
A HySo jet cannot fly HySo in enemy space bcoz if LEO satellite can be shot down, so can a HySo jet.
A HySo jet cannot be agile at lower speeds due to its highly swept body. At HySo speed also at high altitude, it'll need thrusters bcoz low air density reduces control surface efficiency. I wonder how can a massive jet like that be an ASF.
We cant make a 4gen afterburning engine properly, asking around for ToT & JV, then some people overconfidently straight away CONCLUDE things about SCRamjet space fighter based on just DRDOs HSTDV & preliminary ground test.
I suspect that this guy is even Indian.

