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#20
by
Olaf
on 04 Mar, 2017 07:46
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#21
by
Galactic Penguin SST
on 04 Mar, 2017 12:01
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#22
by
Satori
on 09 Mar, 2017 12:19
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Chang Zheng-7 (Y2) for the Tianzhou-1 launch arrived today at Wenchang.
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#23
by
linxiaoyi
on 11 Mar, 2017 06:05
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#24
by
Galactic Penguin SST
on 11 Mar, 2017 13:02
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According to
https://twitter.com/cnspaceflight/status/840490961268482048 rumors point to launch planned on April 23 at 10:20 UTC (can someone check if the orbital plane of TG-2 does cross Wenchang at that time?)
There will be cubesat deployer on board TZ-1 with at least 1 cubesat to be released during the mission.
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#25
by
Satori
on 12 Mar, 2017 16:07
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#26
by
Nordren
on 13 Mar, 2017 10:21
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#27
by
Phillip Clark
on 13 Mar, 2017 10:37
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I think I might be right here, but will Tianzhou docking with Tiangong 2 be the first time that a significantly heavier spacecraft has been the active partner in a docking operation?
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#28
by
EgorBotts
on 13 Mar, 2017 12:13
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I think I might be right here, but will Tianzhou docking with Tiangong 2 be the first time that a significantly heavier spacecraft has been the active partner in a docking operation?
Automated/unmanned, probably.
Apollo + APAS was way heavier than Soyuz in the 1975 rendez-vous, and it was the active part for the two docking operations performed during the mission.
Besides, Shuttle would have been heavier than Mir in 1995, no?
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#29
by
Phillip Clark
on 13 Mar, 2017 12:33
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I think I might be right here, but will Tianzhou docking with Tiangong 2 be the first time that a significantly heavier spacecraft has been the active partner in a docking operation?
Automated/unmanned, probably.
Apollo + APAS was way heavier than Soyuz in the 1975 rendez-vous, and it was the active part for the two docking operations performed during the mission.
Besides, Shuttle would have been heavier than Mir in 1995, no?
Good point about Soyuz and Apollo. As for the shuttle orbiter and the Mir complex, I don't think that the ratio of the two masses was as great as that of Tiangong 2 and Tianzhou 1 which is approaching 2:1.
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#30
by
luhai167
on 15 Mar, 2017 19:29
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#31
by
limen4
on 23 Mar, 2017 18:11
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As far as I understand from the illustrations the planned sequence of joint TG-2 andTZ-1 flight activities is:
1. Launch of TZ-1
2. First docking with TG-2
3. Undocking of TZ-2 and flying around TG-1
4. Second docking with TG-2
5. Undocking of TZ-1
6. Third docking (a rapid one) with TG-2
7. Joint orbit change
8. Undocking of TZ-1 and separate flying
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#32
by
Phillip Clark
on 08 Apr, 2017 15:02
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Cross-posting from the Tiangong 2 thread.
During April 4-6 the orbit of Tiangong 2 was raised from 92.12 min, 374-382 km to 92.26 minutes, 379-391 km which is slightly above the 46-circuits repeating orbit period.
Presumably this is in preparation for the Tianzhou 1 launch - still scheduled for April 23?
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#33
by
linxiaoyi
on 08 Apr, 2017 16:04
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Cross-posting from the Tiangong 2 thread.
During April 4-6 the orbit of Tiangong 2 was raised from 92.12 min, 374-382 km to 92.26 minutes, 379-391 km which is slightly above the 46-circuits repeating orbit period.
Presumably this is in preparation for the Tianzhou 1 launch - still scheduled for April 23?
According to speculation here, in 23 April 19:40
http://www.spaceflightfans.cn/wp-content/uploads/2017/03/148990140.jpg
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#34
by
Steven Pietrobon
on 09 Apr, 2017 05:56
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#35
by
SmallKing
on 09 Apr, 2017 06:52
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#36
by
Phillip Clark
on 09 Apr, 2017 07:35
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#37
by
SmallKing
on 09 Apr, 2017 08:01
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#38
by
Phillip Clark
on 09 Apr, 2017 11:45
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#39
by
Galactic Penguin SST
on 09 Apr, 2017 12:00
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The times above are local time, so T-0 will be around 11:40 UTC for April 20 and 10:18 UTC for April 23.
I'll translate the calculations for these co-planar launch times made at a Chinese spaceflight forum later.
