Scramjets are Go!

skeptical

Science fiction fantasy
Joined
Nov 5, 2008
Messages
560
A nice article in New Scientist.
Scramjets promise space travel for all - space - 22 July 2009 - New Scientist

Many people have dreamed of reaching space using the equivalent of a Boeing 747 to fly passengers up. Of course, even reaching low orbit would allow such a vehicle to carry people vast distances around the world very quickly. London to Sydney in 4 hours, perhaps.

Obviously, standard jet engines will not do it. Even a ramjet cannot do it. However, a supersonic ramjet (scramjet) combined with rocket boosters might do the job. It appears from the article that the technology to permit this is not too far away. So far, the fastest scramjet flight was Mach 10, where Mach 25 is needed. However, this technology is growing rapidly, and the new generation engines, combined with the rocket booster may do it.

Perhaps, in our own lifetimes, we may be able to buy a ticket on a space plane and fly into orbit. Take off from a standard airfield, and land in another airfield half way round the world. Much cheaper than the brute force rocket approach currently used by NASA.

Personally, I would buy a ticket just to experience space!
 
Nik

I am a bit puzzled. Was this a counter argument to my post?

Your first reference was dated 2006 - 3 years ago, and the second much older.

I like the 2006 reference to liquid hydrogen as fuel. I could also see it as the coolant for the engine. After all, it has to be warmed into a gas for ignition. That process to cool the engine. Great!
 
No, Skeptical, I'm just adding detail.

RE really, really have found a way to build and seal an 'impossibly efficient' heat exchanger using capilliary-fine tubing. They even confirmed 'Aeolian Harping' during spin-down when I asked about that phenomenon...

;-))

Um, yes, liq H2 cools the engine. More importantly, via the heat-exchanger loop, it cools the hypersonic, shock-heated air-flow to temperature and density where 'contained' combustion should work. Best of all, the design should work from zero/zero conditions, meaning you would be able to ground-run at least part of the engine, then have it fly itself to the ram-rocket zone...
 
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