China's Space Program News Thread

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eprash

eprash

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t2contra said:
I doubt the power of a commercial jet engine is enough even for a second stage rocket. How about the weight of the equipment needed to extract atmospheric oxygen?
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That's the beauty of hypersonic flight, When you start to travel more than 1km per second the shockwaves generated by inlet is enough to compress and liquefy the atmospheric oxygen

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siegecrossbow

siegecrossbow

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eprash said:
I should have made it more clear It's similar to a plasma engine used in spacecrafts and the prototype is claimed to have performance comparable to commercial jet engines
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As usual comment section is full of bitching and moaning lol

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The site is taking a lot of time to come up, not sure if it's my network issue added the pic for members who may face the same problem
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I think this is the closet thing to iron man style repulsors we can get using real life technology. This could be significant since you don’t need to carry reaction mass (propellant) with your rocket, which could save a lot of weight.
 
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gelgoog

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silentlurker said:
Pretty sure that's not possible, liquid oxygen doesn't exist above -100C no matter how much pressure it's under.
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Uh it does. With enough pressure you can even make it solid at that temperature. It's the same reason why you can't make proper tea at the top of the Himalayas. Because the low pressure decreases the boiling point of water.

Check out the SABRE engine from Reaction Engines. They liquefy air by running liquid hydrogen fuel around a condenser and passing air through it.
 
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silentlurker

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gelgoog said:
Uh it does. With enough pressure you can even make it solid at that temperature. It's the same reason why you can't make proper tea at the top of the Himalayas. Because the low pressure decreases the boiling point of water.

Check out the SABRE engine from Reaction Engines. They liquefy air by running liquid hydrogen fuel around a condenser and passing air through it.
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Oxygen's critical point is -118C -
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Above an element's critical point it cannot be turned into a liquid regardless of how much pressure is applied. That's why they cool the incoming air with LH2 (-250C) to get it under this point.

Also, my very brief reading of the SABRE wiki page -

"In addition, unlike the LACE concept, SABRE's precooler does not
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, letting it run more efficiently."

So I think you have mixed the two designs.
 
by78

by78

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China is to construct a heavy rocket engine testbed near the city of Baoji in Feng County, Shaanxi provice.

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Temstar

Temstar

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201553yg5b6at54msccmo4.jpg
2028 Mars Sample Return vehicles (via Long March 9B or Long March 5 + Long March 3)
Left: orbital return combination
Right: landing and ascent combination, the top green part is called "cruise stage", the big white part with heat shield and fairing is the entry module while the thing inside with engines is the ascent module.

Also mentioned in this powerpoint:

2030 Callisto orbital exploration (via Long March 5)
2049 Outer Solar System exploration, 100AU, or 13.83 light hours from the sun.
 
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