Author Topic: FAILURE: Shijian-18 - CZ-5 (Y2) - WSLC, LC101 - July 2, 2017 (11:23 UTC)  (Read 85619 times)

Online russianhalo117

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So if I understand this right, the replacement satellite for ill-fated Shijian-18 launch will be using CZ-5 (Y3) and will launch in the second quarter of 2018 in place of the originally scheduled Chang'e 5???

Came across this article dated 27 Sept 2017:
https://thespacereporter.com/article.php?n=rocket-failure-causes-china-to-postpone-lunar-sample-return-mission&id=131684

There was a mentioned of a second Shijian-18. I assume the author meant a backup for the Shijian-18 that was lost. Scheduled for next month? Using the CZ-5 (Y3) that was initially meant for Chang'e 5? What do you think...just speculation by the author?

"Another Long March 5 launch scheduled for November might carry a second Shijian-18 satellite, replacing the first one, which was destroyed in the failed launch." (paragraph six of the article)

Previous information said that that launch was schedule for the second quarter of 2018.

Offline Moon Rabbit

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So if I understand this right, the replacement satellite for ill-fated Shijian-18 launch will be using CZ-5 (Y3) and will launch in the second quarter of 2018 in place of the originally scheduled Chang'e 5???

Came across this article dated 27 Sept 2017:
https://thespacereporter.com/article.php?n=rocket-failure-causes-china-to-postpone-lunar-sample-return-mission&id=131684

There was a mentioned of a second Shijian-18. I assume the author meant a backup for the Shijian-18 that was lost. Scheduled for next month? Using the CZ-5 (Y3) that was initially meant for Chang'e 5? What do you think...just speculation by the author?

"Another Long March 5 launch scheduled for November might carry a second Shijian-18 satellite, replacing the first one, which was destroyed in the failed launch." (paragraph six of the article)

Previous information said that that launch was schedule for the second quarter of 2018.

i read the article and was wondering whether it is correct (launch in November 2017) because i cannot find other news about this. But it is probably not true as there is no evidence that the CZ-5 (Y3) had already being transported to Wenchang as posted by zhangdmev (thanks). If i am correct Zhangjiagang port is not anywhere near Tianjin. (Nevertheless, the whereabout of the yuangwang 22 is not known...anyone has idea where it is?)

If there is a launch next month, rocket stages should be transported to Wenchang right now. Could be verified by checking the whereabout of yuangwang21/22.

Edit: found Yuan Wang 21 anchored at Zhangjiagang.

https://www.fleetmon.com/vessels/yuan-wang-21_0_8295142/

Don't known where is Yuan Wang 22 right now.

« Last Edit: 10/14/2017 12:56 AM by Moon Rabbit »
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Online russianhalo117

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So if I understand this right, the replacement satellite for ill-fated Shijian-18 launch will be using CZ-5 (Y3) and will launch in the second quarter of 2018 in place of the originally scheduled Chang'e 5???

Came across this article dated 27 Sept 2017:
https://thespacereporter.com/article.php?n=rocket-failure-causes-china-to-postpone-lunar-sample-return-mission&id=131684

There was a mentioned of a second Shijian-18. I assume the author meant a backup for the Shijian-18 that was lost. Scheduled for next month? Using the CZ-5 (Y3) that was initially meant for Chang'e 5? What do you think...just speculation by the author?

"Another Long March 5 launch scheduled for November might carry a second Shijian-18 satellite, replacing the first one, which was destroyed in the failed launch." (paragraph six of the article)

Previous information said that that launch was schedule for the second quarter of 2018.

i read the article and was wondering whether it is correct (launch in November 2017) because i cannot find other news about this. But it is probably not true as there is no evidence that the CZ-5 (Y3) had already being transported to Wenchang as posted by zhangdmev (thanks). If i am correct Zhangjiagang port is not anywhere near Tianjin. (Nevertheless, the whereabout of the yuangwang 22 is not known...anyone has idea where it is?)

If there is a launch next month, rocket stages should be transported to Wenchang right now. Could be verified by checking the whereabout of yuangwang21/22.

Edit: found Yuan Wang 21 anchored at Zhangjiagang.

https://www.fleetmon.com/vessels/yuan-wang-21_0_8295142/

Don't known where is Yuan Wang 22 right now.
could be somewhere in dry dock.
« Last Edit: 10/14/2017 03:40 PM by russianhalo117 »

Online SmallKing

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Both Yuan Wang 21 and 22 anchored at Jiangyin, Jiangsu as of Oct. 12
In addition to the investigation of CZ-5's failure, the manufacture of SJ-18 02 will take a few time. There is no way CZ-5 Y3 will launch in the coming months
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Online SmallKing

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Interesting. Someone in 9ifly reminded me that the Xiang Yang Hong 09 survey vessel(support ship of the submarine Jiao Long) is just in the position of CZ-5 stage 1 crash. I just checked the satellite AIS, the current position of the ship is 139°34.08'E 16°49.91'N in 2017-10-03 04:28:38(UTC +8)
One of my sources confirmed that they were looking for the debris of this launch, but they hadn't made a final decision whether to salvage it or not
Some are bound for happiness, some are bound to glory, some are bound to live with less, who can tell your story?

Offline Moon Rabbit

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Interesting. Someone in 9ifly reminded me that the Xiang Yang Hong 09 survey vessel(support ship of the submarine Jiao Long) is just in the position of CZ-5 stage 1 crash. I just checked the satellite AIS, the current position of the ship is 139°34.08'E 16°49.91'N in 2017-10-03 04:28:38(UTC +8)
One of my sources confirmed that they were looking for the debris of this launch, but they hadn't made a final decision whether to salvage it or not

Is it normal for the administration to salvage components (in this case the CZ-5 stage 1) after a failed launch?
The Mercury Seven - Carpenter, Cooper, Glenn, Grissom, Schirra, Shepard, Slayton. “Somewhere, something incredible is waiting to be known.” - Carl Sagan

Offline Moon Rabbit

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Latest news about the CZ-5 (Y2) failure. The article mentioned about an interview with the Exec Vice President of GCWIC,Fu Ziheng  in Tokyo on 11 October 2017.
https://www.spaceintelreport.com/china-great-wall-industry-corp-bumpy-year-satellite-launches-returning-flight/

"At the APSCC conference here on Oct. 11, China Great Wall Industry Corp. (GCWIC) Executive Vice President Fu Ziheng discussed the status the post-failure investigations." (para 2)

"What was the cause of this underperformance?

...After the failure we suspended all Long March launches, including LEO and GEO. During the past few months all the work has been done and we can say that for Long March 5 it is a problem with first-stage propulsion. Right now all the correction work is ongoing because Long March 5 is going to be used for Chinese government missions including lunar missions." (para 10)

"The Long March 5 first-stage propulsion problem was a design issue or a manufacturing issue?

The inquiry process is still ongoing." (para 13)


Reading the article, i seems to have the impression that the engineers have found the fault and they are making the corrections. But it looks like when pressed to state officially the caused, Mr Fu does not want to say.

This article also confirms that they have resolved the issue with the Long March 3B failure.


« Last Edit: 10/17/2017 06:04 AM by Moon Rabbit »
The Mercury Seven - Carpenter, Cooper, Glenn, Grissom, Schirra, Shepard, Slayton. “Somewhere, something incredible is waiting to be known.” - Carl Sagan

Online SmallKing

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Interesting. Someone in 9ifly reminded me that the Xiang Yang Hong 09 survey vessel(support ship of the submarine Jiao Long) is just in the position of CZ-5 stage 1 crash. I just checked the satellite AIS, the current position of the ship is 139°34.08'E 16°49.91'N in 2017-10-03 04:28:38(UTC +8)
One of my sources confirmed that they were looking for the debris of this launch, but they hadn't made a final decision whether to salvage it or not

Is it normal for the administration to salvage components (in this case the CZ-5 stage 1) after a failed launch?
After the failure of H-II F8, Japanese salvaged the debris of S1s engine for investigation. But for Chinese, it may be the first time to do it
Some are bound for happiness, some are bound to glory, some are bound to live with less, who can tell your story?

Online Galactic Penguin SST

OK it's "rumors" time on what happened with the YF-77: this rumor (actually posted a few weeks ago) points to the problem being one of the engine's turbopump rotor shaft's enclosure cap falling off and blocked the propellant flow after it fell into the propellant feedline.

Also here is someone who claimed to have spoken with CZ-5 program director Li Dong yesterday:

1. The cause of this failure has been pinpointed and SASTIND will make a public statement soon.
2. Modifications to the engine have been designed. The next step will be to test and certify the modifications.
3. Next flight of the CZ-5 will be (per his personal estimation) before late 2018. (Launching by mid-2018 will be tight due to the need to test the modifications)
4. No upgrades to the CZ-5 (YF-100K, ability of the 2nd stage to make 3+ burns) will be introduced until after the whole launcher is in a mature state.
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline JimO

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For discussion and critiques here's my report on the Philippines observations of the failure and how ultimately disappointing they were.

Online FutureSpaceTourist

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Quote
Long March 5 update: The fault behind the July failure has been identified & effective measures taken. However, the fault itself has not been disclosed. 3rd flight will be by/near end of 2018 http://news.sina.com.cn/c/nd/2018-01-15/doc-ifyqptqv9660647.shtml … (中文)

https://twitter.com/AJ_FI/status/952866589736611840

Quote
The new info comes from Tao Gang, general manager of Tianjin Long March Launch Vehicle Manufacturing Co, which produces the CZ-5. Tao adds mass production of active rockets will be one of the main tasks for 2018, together with start of R&D on next-gen launchers.

https://twitter.com/AJ_FI/status/952867745993056256

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