Author Topic: MISSION FAILURE: Progress M-27M launch Soyuz-2-1A - April 28, 2015  (Read 343526 times)

Offline asmi

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Any way out of Loss Of Vehicle here?
The vehicle will stay in orbit at least few days, got tons of propellant (probably enough to get to the Moon), so I'd say they will keep trying to do something at least for next while. The battery might actually be a limiting factor here as such spin may prevent proper recharging.

Online mtakala24

Rob on NASA TV: No luck on getting telemetry on this pass yet.

Offline Lee Jay

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At that rate of spin, the ends of the spacecraft could be experiencing almost 1g if I did the math right.
« Last Edit: 04/28/2015 01:27 PM by Lee Jay »

Offline Space Pete

I suspect this Progress is lost. :(

Any critical cargo aboard?

This is now not good at all - ATV gone, Cygnus grounded, and I suspect a Progress grounding while an investigation is performed. Luckily we have an HTV this year, else Dragon would have to shoulder it all.
Electronic Engineer by day, NASASpaceflight's ISS Editor by night | Read my NASASpaceflight articles here

Offline Lee Jay

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I suspect this Progress is lost. :(

Any critical cargo aboard?

This is now not good at all - ATV gone, Cygnus grounded, and I suspect a Progress grounding while an investigation is performed. Luckily we have an HTV this year, else Dragon would have to shoulder it all.

Nothing but Progress can replenish ISS propellent, is that correct?

Online mtakala24

End of pass, no luck.

Offline Baranquilla

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I can imagine this is going on right now..

Bolden: How soon can you have CRS 7 ready?
Musk: 3 weeks if you let us reuse the dragon.
Because it's there - George Mallory

Offline orbitaldebris

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1. Off nominal orbit
Orbit is nominal - TLEs provided were incorrect.
I wonder how long the spacecraft can survive in this nominal orbit before it decays. A week at most?

Offline robertross

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No further commanding to the Progress today as no other passes planned.

Waiting on word from Russian controllers on the way forward, but no luck in sending or receiving commands
Remembering those who made the ultimate sacrifice for our rights & freedoms, and for those injured, visible or otherwise, in that fight.

Offline Space Pete

Nothing but Progress can replenish ISS propellent, is that correct?

That is correct - ATV used to be able to do it too, but that's gone now.
Electronic Engineer by day, NASASpaceflight's ISS Editor by night | Read my NASASpaceflight articles here

Offline asmi

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I wonder how long the spacecraft can survive in this nominal orbit before it decays. A week at most?
From what I've heard so far - at least 3 days up to about 2 weeks depending on atmosphere conditions and attitude. But if they won't recover attitude control this all is moot anyway - no way it will get anywhere with such spin, so regaining attitude control seems to be a top priority.

Offline ras391

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Why can we not use US assets to communicate with the Progress? Surely this is not a new idea after all these years.

Offline wxmeddler

So, in case we do have a loss of vehicle here. I'm assuming an uncontrolled re-entry then? Is there anything structural that would be able to make it to the ground?

Offline robertross

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Russian ground station specialists have been released for the day.

Nothing further to update today then, as per Rob Navias

NASA TV signing off for today
Remembering those who made the ultimate sacrifice for our rights & freedoms, and for those injured, visible or otherwise, in that fight.

Offline AJA

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This is now not good at all - ATV gone, Cygnus grounded, and I suspect a Progress grounding while an investigation is performed. Luckily we have an HTV this year, else Dragon would have to shoulder it all.

I know you're talking only about the cargo ferries, but wouldn't they shelve new scientific payloads, and maybe change the manifest on the coming Soyuz, to increase the supplies: science ratio? Soyuz can do a re-boost too, IIRC.

I doubt that - all Progress engines can use all propellant that is onboard (including a portion that it's supposed to deliver to ISS for refueling), so it's very unlikely there is a danger of depleting it anytime soon (the engine has to fire for hour or so to burn through all propellant).
The reason is probably has to do with not making a problem worse as at such spin rate mechanical damage is possible.

All Progress engines can use all propellant aboard? Same tanks for RCS as well as the main engine?

1. Off nominal orbit
Orbit is nominal - TLEs provided were incorrect.

Ah. Thanks. I'd already jumped ahead to wondering whether a truant RCS jet, stayed on longer/harded than its counterpart... and had altered the orbit, in addition to messing up the attitude.

And this spin happened right before I was about to playfully suggest that they should put the Progress in a spin, to aid the KURS in deploying due to centrifugal force. Oh, the irony.

Offline Darga

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What does a potential loss do to ISS supplies? At the last CRS meeting didn't they say they had a 4 mo stockpile?

Offline asmi

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All Progress engines can use all propellant aboard? Same tanks for RCS as well as the main engine?
Yes, all Soyuz/Progress engines (main engine and all RCS thrusters - except for DM thrusters which are only used during reentry) use same propellant from same tanks. Infact RCS is a designated backup propulsion system in case of main engine failure.
« Last Edit: 04/28/2015 01:40 PM by asmi »

Offline Jester

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I suspect this Progress is lost. :(

Any critical cargo aboard?

This is now not good at all - ATV gone, Cygnus grounded, and I suspect a Progress grounding while an investigation is performed. Luckily we have an HTV this year, else Dragon would have to shoulder it all.

http://www.tsenki.com/en/launch_services/help_information/launch/2015/?EID=120974#tab-Cargo-link

Offline FutureSpaceTourist

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Latest NASA blog update:

Quote
UPDATE (9:35 a.m. EDT): Russian flight controllers have continued to try and recover command capability with the ISS Progress 59 cargo craft this morning. The most recent ground pass started at 9:20 a.m. EDT and flight controllers reported no change in the issues with receiving telemetry data from the unmanned craft. The Russian flight control team attempted to command the vehicle over four orbits flying over Russian ground sites with no success. The next series of ground station passes is expected to resume late Tuesday evening. Teams are standing down on the Thursday docking attempt while Russian teams continue to analyze data and develop a troubleshooting plan going forward.

Offline Danderman

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All Progress engines can use all propellant aboard? Same tanks for RCS as well as the main engine?


Progress-M and MM have a unified propellant system, which means that all thrusters are duplicated, with an entire redundant prop manifold, which can draw prop from the mid section prop tanks and the PAO prop tanks.

The main engine can only draw prop from the PAO tanks, and there is no longer a redundant main engine, except that the entire RCS system can serve as a backup.

However, none of this is really relevant now, what is the issue is that the Progress is not responding to commands from TsUP.

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