altmorty OP t1_je6euvy wrote
Reply to comment by erosram in This Swiss hypersonic hydrogen-powered jet will cut flights from Europe to Australia to 4 hours by altmorty
>It's a theoretical design based on a theoretical concept
It can't be clearer. A prototype that's passed tests is not a theoretical design/concept.
Every single tech is expensive to begin with. New tech is almost always initially aimed at the rich, who can afford the expense.
Ihavenoideawhatidoin t1_je7ccmv wrote
Well so far they’re flying subsonic on normal jet engines. So yes, they’re still theoretical.
ryan30z t1_je7rdb1 wrote
I don't think you quite get the engineering challenges of building a hypersonic aircraft.
It's not just a case of slapping bigger engines on. The demand for a passenger scramjet isn't high enough to offset development and maintenance costs.
For moving large payloads, we're not moving away from turbofan any time soon.
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