China's Space Program News Thread

Status
Not open for further replies.
eprash

eprash

Junior Member
Registered Member
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?
Click to expand...
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

1-s2.0-S1270963814001382-gr002.jpg
 
siegecrossbow

siegecrossbow

General
Staff member
Super Moderator
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
Please, Log in or Register to view URLs content!

As usual comment section is full of bitching and moaning lol

View attachment 69952
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
Click to expand...

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.
 
G

gelgoog

Brigadier
Registered Member
silentlurker said:
Pretty sure that's not possible, liquid oxygen doesn't exist above -100C no matter how much pressure it's under.
Click to expand...

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.
 
S

silentlurker

Junior Member
Registered Member
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.
Click to expand...
Oxygen's critical point is -118C -
Please, Log in or Register to view URLs content!


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
Please, Log in or Register to view URLs content!
, letting it run more efficiently."

So I think you have mixed the two designs.
 
by78

by78

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

51043742478_9495868bec_h.jpg
 
Temstar

Temstar

Brigadier
Registered Member
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.
 
Status
Not open for further replies.
Top