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Weareallgoo t1_je3ujjb wrote

Reply to comment by Gauth1erN in The Swiss hypersonic hydrogen jet aiming to fly between Europe and Australia in 4 hours by mancinedinburgh

Neither the aircraft manufacturer, nor the engine supplier are clear about the hypersonic engine the plan to build. It seems they’re still in the very early stages of R&D with plans to modify an existing jet engine to burn hydrogen at subsonic speeds. They also still need to design a cryogenic storage system for the liquid hydrogen. They are not using a rocket propellant.

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Gauth1erN t1_je4d0t3 wrote

Hydrogen is a rocket propellant...

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Weareallgoo t1_je4xpe8 wrote

I should have said I don’t think they are planing to develop a rocket engine based on the press release I’ve read. But then, it also doesn’t sound like they even have a concept design yet, so maybe they will just end up with a rocket engine if they actually want to go hypersonic.

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