China's Space Program News Thread

[Dante80]

Please educate me why you would think that "both YF-100 and YF-115 are in my honest view by far the best and most advanced applications of the base architecture". Thanks

So far all other variants/derivatives have either exhibited or announced worse fundamentals. As in TWR, need for vernier engines, Isp or dry weight.
Of course, in this specific instance we are strictly talking about the Mayak and Unified Launch Vehicle (ULV) projects.

 

[Dante80]

That's not quite accurate.

A big part of the design was additional redundancy and designing for the inevitable failures.

Eg. Using multiple commercial grade microchips instead of radiation-hardened microchips.
Designing each stage with multiple small engines, so the rocket can handle the loss of a single engine and still complete its mission.

That is correct, but not relevant to my stipulation about both Falcon9 re-usability and the Merlin engine design. Engine-out capability was not factored in when F5/F9 were first designed in 2005. It was demonstrated though on the Falcon 9 1.0 CRS-1 mission (which resulted in a partial mission failure). I have more information on this subject, but it is considered proprietary (NSF L2), and we are getting off-topic on this.

 

[taxiya]

Hi temstar

Need your opinion, the video stated that Chinese telemetry is world class and had dual uses, aside from boasting about our hypersonic advantages over the US it said that it able to maneuver Chang'e 5 upon atmospheric re-entry?

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China already has the strength of "Star Wars"? Global landscape will be rewritten? Chang'e-5 CLEP.​

零零传媒

That is in contradiction to what the Chang'e engineer said "Chang'e 5's skip reentry is totally automatic". I generally ignore these kinds of sentimental self-media (自媒体) regardless their pro-China or anti-China attitude.

 

[by78]

An expansive image of CZ-8's maiden launch. Note that this is a screen capture of drone footage.

 

[by78]

Hi temstar

Need your opinion, the video stated that Chinese telemetry is world class and had dual uses, aside from boasting about our hypersonic advantages over the US it said that it able to maneuver Chang'e 5 upon atmospheric re-entry?

Please, Log in or Register to view URLs content!

China already has the strength of "Star Wars"? Global landscape will be rewritten? Chang'e-5 CLEP.​

零零传媒

That Youtube channel doesn't meet Sinodefence Forum's standards. Please do not post content from that channel again.

 

[escobar]

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Long March 8 first flight successfully completed.

https://twitter.com/i/web/status/1341317526563655680

 

[escobar]

https://twitter.com/i/web/status/1342401277456769025

 

[taxiya]

Something about the heat-shield of Shenzhou, Tianwen and Chang'e 5.
1. According to presentation by Luo Lijuan, senior engineer of CALT.

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• The material and manufacturing process is verified in 1999 by Shenzhou 1, and settled (certified) in 2003 by the first manned flight Shenzhou 5.
• The manufacturing process uses a heat-pressure chamber to fill the honey comb struct with ablation paste. It takes 8 hours to make shield (shield blocks) for Shenzhou. In comparison, Orion spacecraft before 2014 manually gunned in every honey comb cell (330000), it took 7 months for the shield. Later Orion uses blocks but still much longer time.

2. According to "Chinese society of composite material",

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, Tianwen spacecraft to Mars uses SiC based material, half the density of Shenzhou and Chang'e material. Tianwen also uses monolithic fabrication, heat-shield diameter is 3.4m. The fabrication efficiency, quality and reliability is world leading.

探测器大底结构的直径达到3.4m左右，共计约70000个蜂窝格子，采用整体成型工艺，实现了在如此多的蜂窝格子中材料一次性灌注到位，不论是成型效率、成型质量还是成型可靠性都达到国际领先水平。

 

[ZeEa5KPul]

Tianwen spacecraft to Mars uses SiC based material, half the density of Shenzhou and Chang'e material. Tianwen also uses monolithic fabrication, heat-shield diameter is 3.4m. The fabrication efficiency, quality and reliability is world leading.

Very interesting implications for China's hypersonic weapons materials.

 

[localizer]

Very interesting implications for China's hypersonic weapons materials.

The accuracy of the whole Chang'e 5 mission bodes well for hypersonic and ballistic missiles. They got some good modelling going on there.