China's Space Program Thread II

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bjj_starter

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by78 said:
China inaugurates a new international organization dedicated to deep space exploration. The International Deep Space Exploration Association (IDEA) aims to "study the development trends of deep space exploration, asteroid defense, and other fields; hold high-level international academic activities; serve as an international cooperation and exchange platform; organize education and training and science popularization activities; promote the cultivation of global aerospace talents; publish and distribute academic journals; hand out awards in recognition of space related achievements, etc."

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Is there any indication of which countries are participating?
 
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ENTED64

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AndrewJ said:
Can anyone post ZQ-3's params/configs info, which is to launch at end of this year? Will it test its reusability at its maiden flight?
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I believe the current plan is that the first few flights will not test reusability. This is pretty normal, they launch in expendable mode first to validate the rocket itself before implementing reusability. As per post #6275 the first version (with the current engines) has 9.4 tons to LEO and the second upcoming version (with better engines) has 21.3 tons to LEO. Both of those are in expendable mode, it'll be lower in reusable mode once that becomes available.
 
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madhusudan.tim

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ENTED64 said:
I believe the current plan is that the first few flights will not test reusability. This is pretty normal, they launch in expendable mode first to validate the rocket itself before implementing reusability. As per post #6275 the first version (with the current engines) has 9.4 tons to LEO and the second upcoming version (with better engines) has 21.3 tons to LEO. Both of those are in expendable mode, it'll be lower in reusable mode once that becomes available.
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The ZQ-2E’s four engines with 72 tonnes each supposedly lift ~6t to LEO, but the nine-engine version zq3 (~85t thrust each) only manages 9.4t- which seems low. Falcon 9 does ~22t expendable, so a 4.5m steel rocket should at least come close unless it's crazy heavy or super inefficient. Maybe the engines have mediocre vacuum Isp, the staging is unoptimized, or they’re being conservative with early ratings. Also, why no common bulkhead?
 
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ENTED64

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madhusudan.tim said:
The ZQ-2E’s four engines with 72 tonnes each supposedly lift ~6t to LEO, but the nine-engine version zq3 (~85t thrust each) only manages 9.4t- which seems low. Falcon 9 does ~22t expendable, so a 4.5m steel rocket should at least come close unless it's crazy heavy or super inefficient. Maybe the engines have mediocre vacuum Isp, the staging is unoptimized, or they’re being conservative with early ratings. Also, why no common bulkhead?
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it's probably a bunch of things but if I had to guess it's mostly them being conservative as those are just interim engines for ZQ-3. With the intended permanent engines for ZQ-3 it has 21.3 tons in expendable mode so it's pretty comparable to Falcon 9.
 
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