Author Topic: Antares AJ-26 engine fails during Stennis testing  (Read 13094 times)

Offline Jason A

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Offline Prober

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Re: Antares AJ-26 engine fails during Stennis testing
« Reply #21 on: 05/24/2014 03:30 PM »
I assume this will expedite a decision on possibly using an ATK (Dark Knight based?) solid for S1?
Orbital already knows that it has to replace NK-33 with something after 2016 or thereabouts.  That something could be RD-181 or solids or something else.  This test failure doesn't change anything in that regard.

 - Ed Kyle   
Assuming the engine cannot be repaired, and Orbital/ATK would like continual service to ISS, it moves the deadline closer by a few months.
My understanding is that Aerojet had some excess NK-33 engines that could be assigned to this first contract if needed. 

 - Ed Kyle

After the investigation I'm more than willing to remove the scrap metal  ;D
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Offline catdlr

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Re: Antares AJ-26 engine fails during Stennis testing
« Reply #22 on: 05/24/2014 09:14 PM »
Just a bit more news:

http://www.sunherald.com/2014/05/23/5596901/no-one-injured-in-hot-fire-engine.html

Quote
Officials say the test started at 2 p.m. Thursday. About 30 seconds into the planned 54-second test, the rocket engine used in the Antares launch vehicle first stage "terminated prematurely, resulting in extensive damage to the engine."

Read more here: http://www.sunherald.com/2014/05/23/5596901/no-one-injured-in-hot-fire-engine.html#storylink=cpy
« Last Edit: 05/24/2014 09:14 PM by catdlr »
Tony De La Rosa

Offline AJA

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Re: Antares AJ-26 engine fails during Stennis testing
« Reply #23 on: 07/14/2014 09:37 AM »
So, did they have a root cause for this nailed down before the ORB-2 launch? I know that the AJ-26s on Antares 4 passed their testing, but wouldn't you like to rule out commonality? The ones used in Antares-4 (which did, indeed, perform without hiccup) might've passed testing, as well as the flight itself - despite being out of design parameters..?

Offline ugordan

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Re: Antares AJ-26 engine fails during Stennis testing
« Reply #24 on: 07/14/2014 10:51 AM »
So, did they have a root cause for this nailed down before the ORB-2 launch?

They wouldn't have launched unless they were convinced they nailed it down. They did borescope inspections of these engines to verify they weren't affected by whatever that was AFAIK.

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