ISS engine abort

• ISS engine abort by Chris SF on 19 Oct, 2005 00:57
• http://www.itar-tass.com/eng/level2.html?NewsID=2533193&PageNum=0
• #1 by realtime on 19 Oct, 2005 03:48
• Man, there's absolutely no news about this that I can find on the NASA HSF page.  Any news from JSC on this?
• #2 by NASA_Twix_JSC on 19 Oct, 2005 03:52
• Russian controllers are dealing with the problem. Claims of an explosion inside the Progress are premature, I've seen a few rumours of that. The engine simply stop firing and they are seeing what can be done.
• #3 by NASA_Twix_JSC on 19 Oct, 2005 03:53
• It's not a huge problem if they can't restart, I should add.
• #4 by Chris Bergin on 19 Oct, 2005 11:22
• Sergi's story and news of another problem for the Russians.
  
  http://www.nasaspaceflight.com/content/?id=3928
• #5 by anik on 19 Oct, 2005 11:28
• MCC-M expert has told me that two of eight Progress M-54 DPO engines during maneuver worked unstably, therefore control system has finished maneuver prematurely...
• #6 by Chris Bergin on 19 Oct, 2005 11:45
• Quote

  anik - 19/10/2005  12:28 PM
  
  MCC-M expert has told me that two of eight Progress M-54 DPO engines during maneuver worked unstably, therefore control system has finished maneuver prematurely...

  
  Uh oh. How much more of a burn will they need to do it to be successful?
  
  Could they simply drop off that Progress and make up for lost orbit with the next ship?
• #7 by anik on 19 Oct, 2005 13:08
• Quote

  Chris Bergin - 19/10/2005  3:45 PM
  
  How much more of a burn will they need to do it to be successful?

  
  It was planned to use about 450 kg of fuel for yesterday's maneuver...
  
  

  Quote

  Chris Bergin - 19/10/2005  3:45 PM
  
  Could they simply drop off that Progress and make up for lost orbit with the next ship?

  
  I think that it is possible...
• #8 by anik on 20 Oct, 2005 13:56
• 1. http://www.friends-partners.org/pipermail/fpspace/2005-October/018189.html
  
  Moscow ITAR-TASS in Russian 0910 GMT 19 Oct 05
  
  Moscow, 19 October: Russia's space agency Roskosmos has urged people not to dramatize the situation surrounding the cutting out of the Progress freighter's engines while correcting the International Space Station's orbit. "The station's orbit is not in a critical state, there is enough fuel," the official spokesman of the Federal Space Agency Roskosmos, Konstantin Kreydenko, told an ITAR-TASS correspondent today.
  He recalled that the adjustment of the orbit was intended to prepare the station for future dockings with Progress cargo craft, the first of which is to be launched from Baykonur on 21 December. "We have more than enough time to calmly find out what went wrong and caused several engines to fail aboard the Progress M-54 which is docked to the station, and to carry out another readjustment," Kreydenko said.
  Out of 28 thrusters used for orientation aboard the cargo craft, eight were involved in the manoeuvre, he said. "Several minutes after switching them on, four developed a faulty 'pulsation' and all the engines were switched off automatically," the Roskosmos spokesman said.
  A special commission from Mission Control Centre is now working to find out the cause of the malfunction. "When the commission finishes its work, a decision will be taken on a new date for the manoeuvre. We will definitely raise the station's orbit. If need be, this operation can be performed by the Progress's main propulsion engines instead of the thrusters," Kreydenko said.
  
  2. http://www.spaceref.com/news/viewsr.html?pid=18428
  
  Last night’s ISS reboost was aborted when Progress 19 thrusters shut down after only 117 sec into the first of two planned burns.   [Preliminary indications from Moscow are that the thrusters fired as commanded, but that a subsequent loss of communication ("talk back") in the pressure sensing feedback loop within the Progress thruster system caused the premature shutdown.  Due to the lack of knowledge of the cause of the anomaly at the time, the second reboost burn was postponed by TsUP/Moscow until the situation is fully understood and any identified workarounds implemented.  The second burn did not take place, and the short first burn resulted in only 0.32 m/s delta-V (instead of 5.88 m/s planned), with 0.55 km altitude increase (instead of 10.1 km planned from both burns).]
• #9 by James Lowe1 on 20 Oct, 2005 14:36
• Quote

  anik - 20/10/2005  8:56 AM
  
   If need be, this operation can be performed by the Progress's main propulsion engines instead of the thrusters," Kreydenko said.
  

  
  I thought that would be dangerous giving the 'bump' that would cause from the thrust?
• #10 by anik on 20 Oct, 2005 15:30
• Quote

  James Lowe - 20/10/2005  6:36 PM
  
  I thought that would be dangerous giving the 'bump' that would cause from the thrust?

  
  Kreydenko means that it is possible to use the Progress M-54 SKD engine for maneuver instead of Progress M-54 DPO engines...
• #11 by NASA_Twix_JSC on 21 Oct, 2005 02:36
• Yes, it's not a major problem.
• #12 by realtime on 21 Oct, 2005 03:06
• Hopefully there will be enough working DPOs to undock and deorbit safely when the time comes.
  
• #13 by Avron on 21 Oct, 2005 04:03
• Quote

  realtime - 20/10/2005  11:06 PM
  
  Hopefully there will be enough working DPOs to undock and deorbit safely when the time comes.
  

  
  DPO? same as a Maneuvering thruster?
• #14 by realtime on 21 Oct, 2005 04:59
• That's right.  Four of eight used in the maneuver developed a "pulsation" anomaly.
  
• #15 by anik on 21 Oct, 2005 15:29
• Quote

  realtime - 21/10/2005  7:06 AM
  
  Hopefully there will be enough working DPOs to undock and deorbit safely when the time comes.

  
  For the deorbit maneuver the SKD engine, not DPO engines, is used...
  
  

  Quote

  Avron - 21/10/2005  8:03 AM
  
  DPO?

  
  DPO = engines for the docking and orientation
  
  SKD = engine for the approach and correction
  
  http://www.spaceref.com/news/viewsr.html?pid=18438
  
  "Russian investigation of the aborted ISS reboost of 10/18 continues.  According to Moscow, it appears that four (out of eight) attitude control system thrusters of the Progress 19 failed, causing shutdown of the remaining jets by the SM GNC (guidance, navigation & control) system.  There is no issue with ISS attitude control at present."
  
  P.S.: MCC-M expert told me that Progress M-54 DPO engines will be switched on for the testings and reception of the additional data on October 26... ISS orbit raise will be on November 9 or 16, if specialists will allow it...
• #16 by realtime on 22 Oct, 2005 05:49
• Quote

  anik - 21/10/2005  11:29 AM
  
  For the deorbit maneuver the SKD engine, not DPO engines, is used...
  

  Good.
  
• #17 by anik on 22 Oct, 2005 06:19
• http://www.spaceref.com/news/viewsr.html?pid=18449
  
  "Update on ISS Reboost Abort: Russian investigation of the 10/18 maneuver abort continues. A test reboost using four Progress thrusters is scheduled next Wednesday (10/26), for ~0.25 m/s delta-V."
• #18 by Avron on 24 Oct, 2005 03:25
• Quote

  anik - 22/10/2005  2:19 AM
  
  http://www.spaceref.com/news/viewsr.html?pid=18449
  
  "Update on ISS Reboost Abort: Russian investigation of the 10/18 maneuver abort continues. A test reboost using four Progress thrusters is scheduled next Wednesday (10/26), for ~0.25 m/s delta-V."

  
  
  Don't you need an at least 6month - Billion dollar study before you do anything, thats the 'right way'?
  
  Good for you guys... keep on moving, in the west all is lost under a lot of paperwork...
• #19 by Sergi Manstov on 27 Oct, 2005 05:15
• Test fire just after midnight Moscow time was successful. Now a date can be decided on trying to raise the orbit of the ISS.