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Orbital Sciences Antares rocket explodes after liftoff

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Re: Orbital Sciences Antares rocket explodes after liftoff

#61

Video of the explosion: https://www.youtube.com/watch?v=jHMmMgdcOSU ...and I believe this is the water-tower you can see in the video: https://www.google.se/maps/place/NASA+Wallops+Flight+Facilit...

I expected it to self desturct.

Why would it not do that? Was it to close to the ground?

Re: Orbital Sciences Antares rocket explodes after liftoff

#62

Earlier quoted context omitted.

I know the Shuttle carried DOD Secure comm equipment in addition to it's in the clear UHF and VHF Radios. I'm assuming that ISS has something similar.

> I know the Shuttle carried DOD Secure comm equipment in addition to it's in the clear UHF and VHF Radios. I'm assuming that ISS has something similar. There's some obvious reasons why the International Space Station might be less likely to carry sensitive US military communications gear than the NASA Space Shuttles.

I don't think it is anything like that. It's for cases where they need to discuss something that they don't want every person with a HAM radio to hear. A discussion between an astronaut and the flight surgeon/spouse/clergy member. I'm sure the Russians have a system on ISS as well. Just having the hardware is not enough to crack into an enemies comms. It's more that they don't want stuff like that falling into the hands of a rouge state like Iran or North Korea, or a non-state actor that might have schemes of reverse engineering it to build their own system. I'd bet there is a Russian Transceiver racked up in JSC, and a DOD system racked up at Russian Space Control.

Re: Orbital Sciences Antares rocket explodes after liftoff

#63
post #55

Terrible situation, but the radio chatter on the live feed is a wonderful way to learn about handling crises in a calm, collected manner. Impressive considering what's going on.

That was the most impressive part for me. It's like listening to Air Traffic control--Some of the most professional conversation even in the face of tragedy.

Re: Orbital Sciences Antares rocket explodes after liftoff

#64

Video of the explosion: https://www.youtube.com/watch?v=jHMmMgdcOSU ...and I believe this is the water-tower you can see in the video: https://www.google.se/maps/place/NASA+Wallops+Flight+Facilit...

I expected it to self desturct. Why would it not do that? Was it to close to the ground?

I'd say it was to close to the ground to self destruct. And there would have been a call from the Range Safety Officer in the event he ordered a destruct or the computer called a destruct.

Re: Orbital Sciences Antares rocket explodes after liftoff

#65

Earlier quoted context omitted.

> Don't fret the failures. Except when it kills people (though this accident didn't).

Or when it costs billions of dollars from NASA.

NASA's CRS contract with Orbital is for 8 flights for $1.9 Billion. Today's flight was supposed to be number 3 of 8.

It remains to be seen if they will be able to complete the rest of their contract. The cause of the accident will need to be investigated, changes to future vehicles may be necessary, and right now it appears as though they damaged their launch pad severely.

Re: Orbital Sciences Antares rocket explodes after liftoff

#66

Video of the explosion: https://www.youtube.com/watch?v=jHMmMgdcOSU ...and I believe this is the water-tower you can see in the video: https://www.google.se/maps/place/NASA+Wallops+Flight+Facilit...

I expected it to self desturct. Why would it not do that? Was it to close to the ground?

I don't think Antares can command itself to destruct. The destruct has to be commanded by the range. There isn't any point to issuing the destruct command unless the impact point is dangerously far from the flight path, and that wasn't the case here.

Re: Orbital Sciences Antares rocket explodes after liftoff

#67
post #3

There aren't many blogs covering this right now, but there are no personnel injured (according to the launch loop) -- just "significant property damage and significant vehicle damage". Nobody has said much yet: https://twitter.com/OrbitalSciences/status/52722568241456742...

Well, that's good. Property damage is insurable - let's hope that's the only loss. Listening to the audio feed for a few minutes, I always find it a bit sad how people resort to 'officialese' bullshit when they're embarrassed or stressed, eg 'we're going to triage the data'?!

I don't think that's just officialese. They are going to be under enormous pressure to find out what went wrong as quickly as possible. Orbital Science's future may be significantly affected by how well (and quickly) they deal with the aftermath.

Re: Orbital Sciences Antares rocket explodes after liftoff

#69
post #20

Earlier quoted context omitted.

Fair point. Although I'd say: fret the suffering of people, not the fact that something really difficult ended up being difficult.

Not to slight your friend, but his was an unmanned launch to resupply the ISS, it's relatively common, comparatively easy, and successful (1 other failure in just under 80 missions). No disrespect intended, but this is a disruption for the ISS, a loss (hopefully insured) for Planetary Resources, a real setback for Orbital... there's no point in sugar coating anything, it sucks. There's just no point in dwelling on it…

The failure rate in manned space missions is approximately 1/50 ("failure" as in "it explodes and everybody dies"). (For example, the Space Shuttle had 2/135 failures.)

The unmanned missions have a higher failure rate, IIRC ~10%, but that number probably includes prototype and old models.

So a 2/80 failures is not so bad. It sucks when it explodes, but going to space is difficult.

Re: Orbital Sciences Antares rocket explodes after liftoff

#70
post #65

Earlier quoted context omitted.

Or when it costs billions of dollars from NASA.

NASA's CRS contract with Orbital is for 8 flights for $1.9 Billion. Today's flight was supposed to be number 3 of 8. It remains to be seen if they will be able to complete the rest of their contract. The cause of the accident will need to be investigated, changes to future vehicles may be necessary, and right now it appears as though they damaged their launch pad severely.

The CRS contract includes development costs, though. The marginal cost of one mission isn't anywhere near 1.9B/8.
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