Tag: Soyuz

A Russian Soyuz rocket today successfully launched a Progress freighter to ISS.

While Russia has already successfully launched three Soyuz rockets since the manned Soyuz launch abort on October 11, this was the first to use the same exact variation of the Soyuz rocket. It is expected they will now approve the manned December 3rd manned launch to ISS.

The leaders in the 2018 launch race:

31 China
18 SpaceX
11 Russia
8 ULA
8 Europe (Arianespace)

China continues to lead the U.S. in the national rankings, 31 to 29.

The Russians yesterday revealed that the sensor they have identified as the cause of the October 11 Soyuz launch failure was damaged during manufacture.

Their response:

Skorobogatov said officials are now taking steps, including putting all assembly staff through competence tests and additional training, to make sure such malfunctions don’t happen again.

The rocket producer will also take apart two other rockets that have been recently assembled and are due to launch in the coming weeks and then re-assemble them, Skorobogatov said.

They do not say how the damage occurred. It also appears that, like all government run operations, no one will be fired. (The Russians only fire people when they are going to criminally indict them.)

Three stories from Russia today on the investigation into last week’s launch failure during a Soyuz launch to ISS.

• Russia puts off military satellite launch over Soyuz booster incident
• UAE astronaut not to fly to ISS in April after accident with Soyuz MS-10
• Commission probing into causes of Soyuz-FG failure to hold next meeting on Monday

The first two simply outline additional changes in the Russian upcoming Soyuz launch forced upon them by the failure. It is already clear that the December launch of a new crew will be delayed also.

The third story has one piece of information that I think is intriguing:

The emergency commission looks into the Baikonur spaceport staff who worked on the Soyuz-FG carrier rocket preparing it for the launch with the manned capsule Soyuz MS-10 atop, but the liftoff ended up in a failure, a source said.

“Some members of the emergency commission are staying at the Baikonur Cosmodrome to investigate the circumstances of the failure of the Soyuz-FG rocket. They will have to check all the employees who were working on the rocket,” he said.

That they specifically mention the investigation of the employees who worked on both the rocket and the capsule suggests that they are seriously considering the possibility that one of those individuals might be the cause of both this failure as well as the drill hole in the Soyuz capsule now at ISS.

Nor can anyone blame them. The evidence so far surrounding the drill hole suggests it was done when the capsule was being prepared for launch at Baikonur. If there is an individual working there with an animus toward the Russian government or its space program, they might have possibility done something to this rocket as well.

The Russian investigation into yesterday’s Soyuz launch failure has tentatively identified a malfunctioning valve as a possible source of the failure.

“The state commission has tentatively established a malfunction of the fuel dump valve of the rocket’s oxidizer tank:exhaust gas coming from the valve pushes a side section away from the center section. The valve appeared to be defective and failed to function,” the source said.

The valve passed the preflight check, he said. “It was opened before the launch, and closed afterwards consistent with the procedure,” the source said.

Once the rocket is fueled, the valve dumps redundant oxygen. “It is closed several minutes before the launch. It is supposed to open after the side section separates from the central section, but that did not happen,” the source said.

The “side section” refers to the Soyuz’s strap-on boosters. The “central section” refers to its core stage. From this report it appears the failure of the valve has been linked to a collision between the stages at separation.

“There are no final versions but the primary cause is understandable and is related to the collision of a side element making part of the first stage. A collision occurred during the separation of the first and second stages,” the Roscosmos official said.

“A deviation from the standard trajectory occurred and apparently the lower part of the second stage disintegrated. The rocket stopped its normal flight and after that the automatic system did its work,” Krikalyov said.

An element of the booster’s first stage collided with the second stage, Krikalyov said. “This could have been caused by the failure of the system of the normal separation, which should have been activated. We will analyze the causes in detail,” the Roscosmos official said.

This is obviously only a preliminary result, and should be treated with caution. Meanwhile, the investigation has also launched a criminal investigation. This doesn’t surprise me, as the Russians will sometimes consider some things, such as incompetence, as falling under criminal statutes. Considering the discovery of a drilled hole on a launched Soyuz capsule only a few weeks ago, however, I think they are probably even more paranoid than normal.

Update: Russia has decided they will launch a unmanned Soyuz mission before resuming manned flights.

This is definitely going to impact ISS operations, and cancels a December manned Soyuz launch.

The Soyuz capsules attached to ISS have a 200 day lifespan in space. Thus, the crews on board cannot stay past those dates, which means if launches get delayed for a significant period the station might end up without a crew. NASA has said ISS can be operated in this manner, but I also know they want to avoid this if at all possible.