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  [Discuss] Loss of Soyuz-U with Progress M-12M (Page 2)

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Author Topic:   [Discuss] Loss of Soyuz-U with Progress M-12M
Robert Pearlman
Editor

Posts: 27328
From: Houston, TX
Registered: Nov 1999

posted 09-02-2011 08:50 AM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Fezman92:
Will the unmanned ones have a Soyuz boilerplate?
The unmanned launches were scheduled prior to the loss of Progress M-12M. Both use similar upper stages, which was what failed.

First will be the commercial launch of Globalstar satellites, followed by the Progress M-13M supply craft that was earlier scheduled to launch after Soyuz TMA-22.

gliderpilotuk
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Posts: 3043
From: London, UK
Registered: Feb 2002

posted 09-09-2011 08:35 AM     Click Here to See the Profile for gliderpilotuk   Click Here to Email gliderpilotuk     Edit/Delete Message   Reply w/Quote
Maybe - just for once - we can congratulate the Russians on identifying the problem within 3 weeks of the rocket failure?

Fra Mauro
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Posts: 1017
From: Maspeth, NY
Registered: Jul 2002

posted 09-12-2011 03:29 PM     Click Here to See the Profile for Fra Mauro   Click Here to Email Fra Mauro     Edit/Delete Message   Reply w/Quote
The Russians should be congratulated on finding the problem so quickly that is true. It may or may not be a quick fix, if as the New York Times reported, it is a quality control issue.
However reassuring that finding may be for space officials in Russia and at NASA, which has rented seats on the Soyuz rocket as the only means for Americans to reach space after the retirement of the space shuttle this summer, pinpointing the cause as a manufacturing flaw is likely to increase jitters about Russian safety.

The commission shared this concern. "The members of the commission came to the conclusion that the manufacturing defect was accidental," it said. "But a decision can be taken to qualify it as a single instance only after a thorough re-evaluation" of quality control in the entire parts supply for the third-stage engines.

The commission recommended that the space agency put into effect a better quality-control program for engine parts and offered a suggestion for the plant that made the flawed pipe: "video surveillance of workers at the final assembly line."

SpaceAngel
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Posts: 121
From: Maryland
Registered: May 2010

posted 10-30-2011 03:23 PM     Click Here to See the Profile for SpaceAngel   Click Here to Email SpaceAngel     Edit/Delete Message   Reply w/Quote
Did the Russian space agency ever determine what caused the failure of the resupply ship in August?

Editor's note: Threads merged.

Robert Pearlman
Editor

Posts: 27328
From: Houston, TX
Registered: Nov 1999

posted 10-30-2011 03:43 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
The third stage engine failure was ultimately attributed to a blocked kerosene fuel line. The other engines from the same production run were inspected and the blockage was found to a single occurrence anomaly.


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