Tag: Tianzhou

Tianzhou unmanned freighter completes month-long free flight, re-docks with Tiangong-3

9:30 am

Engineers today successfully re-docked a Tianzhou unmanned freighter to China’s Tiangong-3 space station after 33 days flying in formation with the station.

As is usual, China released no information about the reasoning behind this free flight, though some reasons are obvious. The station has two docking ports, and during that 33-day time period the station also completed a crew swap, with one Shenzhou capsule docking with three new astronauts while the previous crew and its Shenzhou capsule was still docked. The Tianzhou freighter had to undock to provide a port during this time period for the two manned capsules.

This formation free flight and docking was also likely testing the kind of routine maneuvers China plans to do when it launches its Hubble-class optical space telescope next year. That telescope will fly freely near the station during most of its operations. For maintenance and repair however it is my understanding that it will be brought back to the station and docked with it. The just completed independent flight of the Tianzhou freighter demonstrated this capability.

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China launches cargo freighter to its Tiangong-3 space station

9:29 am

Using its Long March 7 rocket launching from its coastal Wenchang spaceport, China today successfully placed into orbit a Tianzhou cargo freighter to resupply the Tiangong-3 space station.

The leaders in the 2023 launch race:

29 SpaceX (with a launch scheduled for later today)
17 China
6 Russia
4 Rocket Lab

American private enterprise still leads China 33 to 17 in the national rankings, and the entire world combined 33 to 29.

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April 5, 2023 Quick space links

2:34 pm

Courtesy of BtB’s stringer Jay.

 

 

  • Tianzhou freighter will fly in formation with China’s Tiangong-3 space station

    • The plan is to periodically redock the freighter to the station “when inventories stored inside are needed.” Jay wonders whether this is a test of the similar formation flying that will be required when China’s space telescope arrives next year to orbit near the station for periodic maintenance and repair. I think he is correct.

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China launches Tianzhou freighter to Tiangong-3 space station

9:32 am

Earlier today China successfully used its Long March 7 rocket to launch the fifth Tianzhou freighter to its Tiangong-3 space station.

At 12:10 p.m., Tianzhou-5 conducted a fast automated rendezvous and docking at the rear docking port of the space station’s core module Tianhe. This is the first time that China’s cargo craft has completed a fast automated rendezvous and docking in about two hours, setting a world record, according to Pan Weizhen, a designer of the cargo craft system from the China Academy of Space Technology.

The leaders in the 2022 launch race:

52 SpaceX
49 China
19 Russia
9 Rocket Lab
8 ULA

American private enterprise now leads China 75 to 49 in the national rankings, and trails the rest of the world combined 77 to 75.

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Tianzhou-4 freighter undocks from Tiangong-3, while Tianzhou-5 prepares for launch

9:42 am

Chinese engineers have undocked the Tianzhou-4 unmanned freighter from their Tiangong-3 space station, even as other engineers complete the stacking of Tianzhou-5 on its rocket and move it to its launch site.

Tianzhou-4 remains in orbit. At some point it will be de-orbited to burn up over the ocean, but China’s state-run press has not said when. In the past engineers have kept these cargo freighters in orbit after undocking for long periods in order to test their capabilities.

Though the launch date for Tianzhou-5 on its Long March 7 rocket was also not revealed by today’s press report, earlier reports suggest the launch is targeting November 12th.

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China launches Tianzhou freighter to space station

3:50 pm

The new colonial movement: China today successfully used its Long March 7 rocket to launch a new Tianzhou unmanned cargo freighter to its Tiangong space station.

The cargo is for the station’s next crew, scheduled to launch in June for a six month mission, during which two new large modules will be added to the station.

The launch took place at China’s sea coast Wenchang spaceport, so its expendable lower stages all fell harmlessly in the ocean.

The leaders in the 2022 launch race:

18 SpaceX
15 China
6 Russia
3 Rocket Lab
2 ULA

U.S. private enterprise still leads China 26 to 15 in the national rankings, as well as the entire world combined 26 to 24.

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China tests space station robot arm

9:49 am

The new colonial movement: The Chinese state-run press yesterday reported that it has successfully used the robot arm on its Tiangong space station to move a Tianzhou freighter from one point to another.

After being unlocked and separated from the space station core module Tianhe, Tianzhou-2 was moved into a predetermined position by the robotic arm. The arm then reversed the maneuvers to bring the spacecraft back to its original position. Tianzhou-2 re-docked with the core module and completed locking.

The test preliminarily verified the feasibility of using the mechanical arm to conduct a space station module transfer, confirmed the effectiveness of relevant technologies, and laid a foundation for the subsequent in-orbit assembly and construction of the country’s space station, said the CMSA [Chinese Manned Space Agency].

The news report did not indicate whether this operation was run from ground control, or by the astronauts on board Tiangong. Either way, it apparently clears the way for the arrival of two more large modules, planned for launch later this year, suggesting that the arm will be used in some manner to position those modules prior to docking.

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China launches unmanned Tianzhou freighter to its space station

9:05 am

The new colonial movement: In preparation for the arrival of its next three-person crew, China yesterday successfully used its Long March 7 rocket to launch an unmanned Tianzhou freighter to its new space station, docking there seven hours later.

The Long March 7 is a new rocket that launches from China’s Wenchang spaceport on the country’s southern coast. Thus, its expendable stages fall into the ocean, not within China. The rocket also does not use toxic hypergolic fuels, but kerosene and oxygen, so it is less environmental harmful.

The crew will launch to the station on October 13th and will likely spend six months at the station.

The leaders in the 2021 launch race:

32 China
23 SpaceX
15 Russia
4 Northrop Grumman

The U.S. still leads China 34 to 32 in the national rankings.

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China successfully launches 1st cargo freighter to its space station

9:31 am

On May 29th China successfully launched the first Tianzhou cargo freighter to bring cargo the now-orbiting first module, Tianhe, of its under construction space station, docking there one day later.

They plan to launch the first crew of three to the station in June.
The leaders in the 2021 launch race:

16 SpaceX
14 China
8 Russia
2 Rocket Lab
2 ULA

The U.S still leads China 22 to 14 in the national rankings.

Sorry for the late posting, but I have been off on a cave expedition in a very remote area in Nevada. Needed a break from the news and work. Presently on the long drive home. Posting will resume at full speed later tonight.

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China scrubs launch of station cargo freighter again

10:43 am

For the second time in two days China has scrubbed the launch of the first unmanned Tianzhou cargo freighter to the core module of its space station,

As before, the Chinese only said that the scrub was due to unstated “technical issues.”

They will likely try again tomorrow, but that is pure speculation. Without a more detailed report from China, we really have no idea what is happening.

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China scrubs launch of Tianzhou freighter to its Tianhe station module

12:24 pm

The first launch of a Tianzhou freighter to China’s first module, dubbed Tianhe, of its planned Chinese Space Station (CSS), was scrubbed early this morning for unstated “technical reasons.”

Not only has China’s state-run press or its space agency not revealed what caused the scrub, they have said nothing about a new launch date. This cargo freighter however apparently needs to be in place before the arrival of the station’s first crew, now roughly scheduled for sometime in June.

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China rolls out rocket for next space station launch

10:00 am

The new colonial movement: On May 15th China rolled out the Long March 7 rocket that on May 20th will carry the first Tianzhou cargo freighter to the already launched core module of its space station.

Tianzhou-2 will carry 4.69 tons of cargo in a pressurized segment and 1.95 tons of propellant, according to the China Manned Space Agency (CMSA).

Meanwhile, the core stage, dubbed Tianhe, has successfully completed its on-orbit checkouts and has placed itself in the right orbit for the arrival of Tianzhou.

If all goes right with this cargo mission, China is targeting a June launch for the station’s first three-man crew, who will attempt to stay at the station for three months.

Do not expect much information to be released by China during these missions. Like the Soviet Union of old, and as they have been doing routinely since their space program began to gear up in the past decade, they will only make periodic terse announcements, all of which will contain only the most superficial of information. Only much later will more be learned, usually many years after the fact when its news value has vanished and it only concerns historians and space buffs.

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