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Chang'e 5 sample return mission
yaohua2000
post Nov 6 2012, 12:28 AM
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Chang'e 5 atmospheric re-entry and parachute ejection system tested.
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Paolo
post Jan 20 2013, 10:15 AM
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A paper (in Chinese) on the design of the Chang'e sample return drill. it includes a nice CAD view of the probe
Design and Analysis of Automatic Drilling Sampling Mechanism for Lunar Exploration
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kenny
post Dec 16 2013, 08:30 PM
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Today's bland news from Xinhua News Agency... but.... what is Chang'e 4 going to do?
A repeat of Chang'e 3 with a new Rover?

BEIJING, Dec. 16 (Xinhua) -- China plans to launch lunar probe Chang'e 5 in 2017, according to the State Administration of Science, Technology and Industry for
National Defense. The development of Chang'e 5 is proceeding smoothly, said the administration's spokesman Wu Zhijian at a press conference on Monday.

The just-concluded Chang'e 3 mission marked completion of the second phase of the country's lunar program, which includes orbiting, landing and returning to Earth.

The lunar program will enter the next stage of unmanned sampling and returning, which will include Chang'e 5 and 6 missions, according to Wu.

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Phil Stooke
post Dec 16 2013, 08:44 PM
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The feeling among China-watchers seems to be that Chang'E 4 will do what CE2 did for CE1 - if CE1 failed it's a simple back-up, but when CE1 succeeded, CE2 became an opportunity to test advanced technology. It flew a direct route to the Moon instead of several increasing orbits, it carried advanced cameras, it flew a more complex orbital mission including low altitude flyovers of the landing area for very high resolution imaging.

So for CE4 there are reports it will carry advanced auto-navigation software. And my impression now is that it may test sample collection and handling tools as well. All in preparation for CE5 and CE6. So still a rover mission, but more advanced.

Phil


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tolis
post Dec 16 2013, 09:22 PM
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May they also try re-igniting the lander's main engine to send it on a ballistic
hop to a different site? I think Surveyor did that, albeit to only a few feet away to enable
stereo coverage of the surrounding area. They may not wish to do the same with Chang'e 3
as it marks, more so than the rover, the site of the first Chinese landing on the Moon.

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Airbag
post Dec 16 2013, 09:33 PM
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No, I read that one of the first tasks for the lander was to vent the propulsion system.

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Thorsten Denk
post Dec 16 2013, 09:34 PM
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QUOTE (Phil Stooke @ Dec 16 2013, 09:44 PM) *
The feeling among China-watchers seems to be that Chang'E 4 will do what CE2 did for CE1 - if CE1 failed it's a simple back-up, but when CE1 succeeded, CE2 became an opportunity to test advanced technology. It flew a direct route to the Moon instead of several increasing orbits, it carried advanced cameras, it flew a more complex orbital mission including low altitude flyovers of the landing area for very high resolution imaging.

So for CE4 there are reports it will carry advanced auto-navigation software. And my impression now is that it may test sample collection and handling tools as well. All in preparation for CE5 and CE6. So still a rover mission, but more advanced.

Phil


It seem's your right:

China plans to launch Chang'e-5 in 2017
English.news.cn 2013-12-16 15:04:11

"As the backup probe of Chang'e-3, Chang'e-4 will be adapted to verify technologies for Chang'e-5, according to Wu."

Thorsten
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kenny
post Dec 20 2013, 10:28 PM
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From the same article, I thought this was significant:

The lunar program will enter the next stage of unmanned sampling and returning, which will include Chang'e-5 and 6 missions, according to Wu.
"The program's third phase will be more difficult because many breakthroughs must be made in key technologies such as moon surface takeoff,
sampling encapsulation, rendezvous and docking in lunar orbit, and high-speed Earth reentry, which are all new to China," Wu said.

Rendezvous and docking in lunar orbit is curious, as this diagram previously released seems to show a return capsule lifting directly off the moon' surface,
like the Soviet Luna 16 etc. You wouldn't carry the weight of an earth-return capsule down to the lunar surface if you planned to transfer the samples
in lunar orbit.

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pospa
post Dec 21 2013, 12:16 AM
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QUOTE (kenny @ Dec 20 2013, 11:28 PM) *
Rendezvous and docking in lunar orbit is curious, as this diagram previously released seems to show a return capsule lifting directly off the moon' surface, ...

That diagram in your post is quite old.
This one bellow should more reflect the latest return mission design:

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kenny
post Dec 21 2013, 11:21 AM
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Dekuji, thanks.... that makes more sense when we see the size of the return module in this recent test.


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SpaceListener
post Dec 21 2013, 03:06 PM
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I suspect that the planned trip of spaceship Chang'e-5 to the Moon is due to the required time to upgrade the capacity of rocket to send a much heavier Chang'e-5.
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vjkane
post Dec 21 2013, 10:35 PM
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QUOTE (pospa @ Dec 20 2013, 04:16 PM) *
That diagram in your post is quite old.
This one bellow should more reflect the latest return mission design:

Do you know the source of the diagram? I'd like to use it for my blog.


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0101Morpheus
post Dec 22 2013, 01:52 AM
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I feel that the design of the sample return can be used as proof in concept for future planetary missions such as a Mars sample return like we have been wanting for decades.
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djellison
post Dec 22 2013, 02:56 AM
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Whilst some technology could be carried across - the requirement for Mars ascent and lunar ascent are very different. 2x the gravity, plus an atmosphere to deal with. The two vehicles would be very different.

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pospa
post Dec 22 2013, 08:40 AM
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QUOTE (vjkane @ Dec 21 2013, 11:35 PM) *
Do you know the source of the diagram? I'd like to use it for my blog.

I took it from here: http://forum.nasaspaceflight.com/index.php...4230#msg1134230
And Chinese original can be found here: http://www.fyjs.cn/bbs/read.php?tid=981809

Admin Note: Be aware that on the Chinese website a pop-up appears.
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