Sergi Manstov - 27/10/2005 1:15 AM
Test fire just after midnight Moscow time was successful. Now a date can be decided on trying to raise the orbit of the ISS.
Great news... what was the problem?
Avron - 27/10/2005 6:55 PM
Great news... what was the problem?
Progress has eight DPO engines for ISS orbit raising: four DPO engines belong to the FIRST manifold, other four DPO engines belong to the SECOND manifold...
For ISS orbit raising on October 18 all eight Progress M-54 DPO engines were used. One of DPO engines, most likely belonging to the FIRST manifold, has failed...
Four Progress M-54 DPO engines, belonging to the SECOND manifold, were successfully tested on October 26...
Therefore MCC-M experts have made decision to execute ISS orbit raising on November 10 with use of four Progress M-54 DPO engines, belonging to the SECOND manifold...
From NASA Space Station On-Orbit Status 27 October 2005
http://www.spaceref.com/news/viewsr.html?pid=18510"Last night's reboost test on four Progress 19 [M-54 - anik's note] thrusters of backup manifold #2 went nominally, without issues. The 114-sec burn generated ~0.25 m/s delta-V, with an altitude gain of about 400 m. A test of the four thrusters of manifold #1, which caused the reboost abort on 10/18 is under consideration [test is cancelled - anik's note]. The date for the reboost to set up proper orbit phasing for Progress 20 [M-55 - anik's note] launch is TBD [November 10 - anik's note]."