Author Topic: NASA’s Ascent Abort-2 Test of Orion  (Read 1578 times)

Online catdlr

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NASA’s Ascent Abort-2 Test of Orion
« on: 11/10/2017 03:08 AM »
NASA’s Ascent Abort-2 Test of Orion

NASA Johnson
Published on Nov 9, 2017

In a test targeted for April 2019 known as Ascent Abort-2, NASA will verify the Orion spacecraft’s launch abort system, a tower on top of the crew module, can steer the capsule and astronauts inside it to safety in the event of an issue with the Space Launch System rocket when the spacecraft is under the highest aerodynamic loads it will experience during ascent for deep-space missions. The test is quick, fast and high, lasting less than three minutes with the test crew module reaching an average speed of Mach 1.5, roughly 1020 miles per hour, at approximately 32,000 feet in altitude.

https://www.youtube.com/watch?v=6HK9G7feXEk?t=001

Tony De La Rosa

Online RonM

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Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #1 on: 11/10/2017 04:53 AM »
Interesting they are skipping the parachutes. I guess there have been enough parachute drop tests.

Offline woods170

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Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #2 on: 11/10/2017 09:10 AM »
Interesting they are skipping the parachutes. I guess there have been enough parachute drop tests.
Skipping the chutes seems logical, given that the chutes will be fully qualified by then. But installing ejectable data-recorders is introducing new failure modes. Better hope that telemetry is prime data-acquisition channel and the data-recorders are just back-ups.

Online mike robel

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Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #3 on: 11/10/2017 10:32 AM »
Seems to me including parachutes would provide a more robust test at higher speeds with more stress.  They performed 6 tests for Apollo and only two for Orion?  Perhaps computer simulation is the reason for fewer tests?

Is this test date far enough out from the now planned DEC 2019 first launch to recover from a failure?

Offline russianhalo117

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Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #4 on: 11/10/2017 03:09 PM »
Seems to me including parachutes would provide a more robust test at higher speeds with more stress.  They performed 6 tests for Apollo and only two for Orion?  Perhaps computer simulation is the reason for fewer tests?

Is this test date far enough out from the now planned DEC 2019 first launch to recover from a failure?
Several tests previously planned under Constellation Programme were cancelled under the follow on programme: PA-2 and 3 and AA-1 were cancelled but AA2 was kept.

Offline rayleighscatter

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Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #5 on: 11/10/2017 07:08 PM »
Seems to me including parachutes would provide a more robust test at higher speeds with more stress.  They performed 6 tests for Apollo and only two for Orion?  Perhaps computer simulation is the reason for fewer tests?

Is this test date far enough out from the now planned DEC 2019 first launch to recover from a failure?
It was originally scheduled to be more than 6 months after EM-1. But with EM-1 moving right, and AA-2 moved forward from December to April it got back around to the happy side of the schedule.

Offline Basto

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Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #6 on: 11/10/2017 07:47 PM »
Is there any information of the motor that it is launching on?  I am assuming some sort of solid motor.

Offline whitelancer64

Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #7 on: 11/10/2017 07:50 PM »
Is there any information of the motor that it is launching on?  I am assuming some sort of solid motor.

The first stage of a Peacekeeper missile.
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Offline ZachS09

Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #8 on: 11/12/2017 07:03 PM »
Is there any information of the motor that it is launching on?  I am assuming some sort of solid motor.

The first stage of a Peacekeeper missile.

More like the first stage of the Minotaur IV/V/VI.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline russianhalo117

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Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #9 on: 11/12/2017 10:03 PM »
Is there any information of the motor that it is launching on?  I am assuming some sort of solid motor.

The first stage of a Peacekeeper missile.

More like the first stage of the Minotaur IV/V/VI.
Same motor. Just Peacekeeper GFE.

Offline Fequalsma

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Re: NASA’s Ascent Abort-2 Test of Orion
« Reply #10 on: 11/19/2017 02:08 AM »
AA-2 boilerplate capsule under construction

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