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#60
by
FutureSpaceTourist
on 16 Mar, 2020 14:05
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#61
by
input~2
on 16 Mar, 2020 14:25
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Official failure announcement:
Long March VII failed in launch mission of medium carrier rocket
2020-03-16 23:13 Xinhua News Agency
Xinhua News Agency, Wenchang, Hainan, March 16th. At 21:34 on the 16th, China organized the first flight mission of the Long March VII to medium carrier rocket at the Chinese Wenchang space launch site. The rocket flight was abnormal and the launch mission failed. Follow-up experts will be organized to investigate and analyze the cause of the failure.
https://sd.iqilu.com/v7/share/article/6606225
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#62
by
otter
on 16 Mar, 2020 14:54
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China's Long March-7A carrier rocket fails in maiden flight
http://www.xinhuanet.com/english/2020-03/16/c_138884538.htmSource: Xinhua| 2020-03-16 23:18:01
WENCHANG, Hainan, March 16 (Xinhua) -- The first of China's new medium-sized carrier rocket Long March-7A suffered a failure Monday.
The rocket blasted off at 9:34 p.m. Beijing Time from the Wenchang Space Launch Center on the coast of south China's Hainan Province, but a malfunction occurred later.
Chinese space engineers will investigate the cause of the failure.
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#63
by
Galactic Penguin SST
on 16 Mar, 2020 15:12
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Quick look of where the failure happens can impact near term flights of Chinese rockets:
https://twitter.com/Cosmic_Penguin/status/1239574867709583360Latest rumors seems to point to a 3rd stage problem - this would probably ground the Long March 3 series rockets (a few comsats - including one for Indonesia - and the last GEO Beidou navsat in line next), although it might be something other than the long-time-in-use YF-75 engines (GNC/attitude control/structural etc.) that could be specific to the Long March 7A.
With the much changed YF-75D used on the Long March 5 (gas generator cycle > expander cycle so pretty big change, though probably still shares some commodity) it probably won't be affected, and certainly not the Long March 5B next in lane.
Shorter groundings may occur due to commodity checks (GNC, software etc.)
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#64
by
Skyrocket
on 16 Mar, 2020 15:53
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Any Information if orbit was reached?
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#65
by
input~2
on 16 Mar, 2020 16:20
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Any Information if orbit was reached?
No objet cataloged at this time
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#66
by
ZachS09
on 16 Mar, 2020 16:49
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My best guess is that the third stage engines malfunctioned during the first burn and the vehicle may have not achieved Earth orbit.
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#67
by
Chris Bergin
on 16 Mar, 2020 17:18
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#68
by
JimO
on 16 Mar, 2020 20:09
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LM5 flight 2 spectacularly failed as it passed north of Luzon, my incident report is here:
July 2, 2017 Long March 5 launch failure from Philippines
http://satobs.org/seesat_ref/misc/18_chisat_fail_phil_final_draft.pdfEven if this ascent path passed within sight of Luzon, since it presumably was too deep into night for sunlight illumination of the engine plume, the initial stage-3 burn [and malfunction?] wouldn't have been as spectacular, but if skies were clear, somebody in or near the Philippines might have seen something weird in the northern sky.
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#69
by
Galactic Penguin SST
on 17 Mar, 2020 01:19
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#70
by
Galactic Penguin SST
on 17 Mar, 2020 01:47
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#71
by
Galactic Penguin SST
on 17 Mar, 2020 03:13
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#72
by
ZachS09
on 17 Mar, 2020 11:53
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Not to ruin the bad mood about the failure, but if this has to do with the YF-115, then there should be no issue with the Long March 5 on both its 5B test flight and the Mars mission.
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#73
by
Satori
on 17 Mar, 2020 17:02
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The desintegration event makes me remind the Falcon-9 explosion on CRS-7...
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#74
by
FutureSpaceTourist
on 05 May, 2020 09:05
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#75
by
Galactic Penguin SST
on 10 Jul, 2020 17:03
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#76
by
shijiav
on 27 Aug, 2020 17:04
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http://t.cn/A64ZGyqY?m=4542691164034089&u=3279752321All right the inspection of the problem for CZ-7A is complete and this video was released.
But this video em...It`s pretty hard even for Chinese to understand.
I was wondering how a non-Chinese speaker with a huge language barrier would watch this video.
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#77
by
luhai167
on 27 Aug, 2020 22:59
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http://t.cn/A64ZGyqY?m=4542691164034089&u=3279752321
All right the inspection of the problem for CZ-7A is complete and this video was released.
But this video em...It`s pretty hard even for Chinese to understand.
I was wondering how a non-Chinese speaker with a huge language barrier would watch this video.
So is it not enough clearance structure that cause the cable to break or inadequate test procedure? Or both?
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#78
by
GELORD
on 18 Oct, 2020 15:36
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T-0 = 21:34:47.361 BJT 2020-03-16 (13:34:47.361 UTC)
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#79
by
Galactic Penguin SST
on 23 Jan, 2021 04:50
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Just after the LM-8 flight last December, there was an official report that the LM-7A 2nd stage "lost pressurization a few seconds after stage separation".
The same article mentioned that vibration analysis were done on mock-ups for a pipe burst scenario. Alternatively there were rumors that the LM-7A reduced helium bottles capability on the 2nd stage from the LM-7 to save mass, but that turned out to be inadequate.
The testing failure mentioned a few comments above (electric cables damaged during 2nd stage gimbal tests, with the structural design department blamed inadequate testing procedures and the program management blamed inadequate cabling arrangement design) was apparently during pre-launch testing and probably isn't related to the one in-flight.
http://spaceflightfans.cn/85001.html