/sci/ - Science & Math

>>5309194
>The Skylon's not going to have a big tank of liquid nitrogen on it, they'll be using the fuel, and by their own figures they'll be boiling off more hydrogen fuel precooling the air than they'll be able to burn with the air.
Isn't the whole point of the SABRE engine that the used hydrogen it burns with the air is enough to cool the air? (actually, via the helium, in HX4, that will the one to cool the air)

That's the base of their technology and I though the prototype engine they are building now and for the 3 next years would actually prove this is a workable solution.

>>3565107
Skylon was scrapped because they knew it was shit. Liquefying air and burning that in a rocket to save on oxygen transport for 1/3 of the flight. Srsly learn to think. I pointed out to them that they would have a problem with ice clogging the shit up a few years ago and they had not thought of it, they then went through a major design revision to handle that problem. They have nothing flight tested, they are going to use hydrogen slush at a few degrees above absolute zero in tanks with huge surface areas next to 1.2 k skin. Its a paper rocket and its less plausible than what most science fiction offers.

>>1790802
here you dumb fuck