russian space agency says 3d stage launch vehicle fuel leak caused progress mishap. Need to be fixed before Expedition 44 crew launch.
Quote from: Galactic Penguin SST on 05/12/2015 03:52 pmNothing new really - they are still looking at what caused the blowing up at the spacecraft separation plane.Doesn't this count as an official confirmation that it was in fact a launch failure? I personally count 3rd stage shutdown and s/c sep as parts of launch. I'm just looking at the "2015 in spaceflight" wikipedia page which I believe you are curating and it lists the launch as success and notes s/c failure.
Nothing new really - they are still looking at what caused the blowing up at the spacecraft separation plane.
Twet from:Jeff Foust @jeff_foust 37m37 minutes agoRoscosmos statement says the return of 3 ISS crewmembers scheduled for Wed night now planned for early June: http://bit.ly/1E415qE
Quote from: Peter King @PeterKingCBSrussian space agency says 3d stage launch vehicle fuel leak caused progress mishap. Need to be fixed before Expedition 44 crew launch.
How in the heck does a fuel leak lead to an over performance?
Quote from: Lee Jay on 05/12/2015 09:46 pmHow in the heck does a fuel leak lead to an over performance?Leaner mixture -> higher thrust, but hotter than nominal operating point?
(which made me think - what other launch had the rocket stage conclusively caused its main payload to be damaged beyond salvageable state in spaceflight history? I don't think the latest plausible case - Eutelsat W3B - was conclusively proven)
Given how many times we have been burned by hasty Russian statements, or translation errors, I would suggest that this "fuel leak" is nothing but a rumor at the moment.
Quote from: Galactic Penguin SST on 05/12/2015 08:46 pm(which made me think - what other launch had the rocket stage conclusively caused its main payload to be damaged beyond salvageable state in spaceflight history? I don't think the latest plausible case - Eutelsat W3B - was conclusively proven)2MV-2 #1 and Cosmos 96 come to mind...
Quote from: GClark on 05/13/2015 12:05 amQuote from: Galactic Penguin SST on 05/12/2015 08:46 pm(which made me think - what other launch had the rocket stage conclusively caused its main payload to be damaged beyond salvageable state in spaceflight history? I don't think the latest plausible case - Eutelsat W3B - was conclusively proven)2MV-2 #1 and Cosmos 96 come to mind...SpaceX Falcon-1 Flight 3 was a lot more recent...