China's Space Program Thread II

[madhusudan.tim]

Jiuquan LC won't let you do the RTLS, plus it will burn much more fuel compare to the "not far enough" downrange pad. It is faster than the F9 when landing burn started, sources estimated the stage was in super/trans sonic range. while F9 typically start the landing burn at 0.7 Ma.
Yellow line is the V/T line of the first stage.
View attachment 165694

Instead of using the first stage to provide large delta V, it might be optimal to use expendable second stage in case of ZQ3. Why not use first stage stage to launch in the higher trajectory so that it does not have to use more fuel returning back?

 

[BoraTas]

Instead of using the first stage to provide large delta V, it might be optimal to use expendable second stage in case of ZQ3. Why not use first stage stage to launch in the higher trajectory so that it does not have to use more fuel returning back?

Generally speaking more of the delta-V is desired to be in the first stage for LEO focusing rockets, because of the thrust of the first stage. With reusability, this is even more important because you only save the resources for the structures you recover. More first stage = more structure recovered.

 

[GulfLander]

Another chip of the launch posted in douyin

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