Author Topic: Atlas V 401 - Cygnus CRS OA-7 - April 18, 2017 - Launch  (Read 153420 times)

Offline psloss

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Re: Atlas V 401 - Cygnus CRS OA-7 - March 27, 2017
« Reply #80 on: 03/28/2017 04:33 pm »
NAC HEO meeting presentation says current target period is mid-April.  (I heard a 'NET' in there, but will have to relisten later.) Changing out hardware in booster engine compartment if I heard correctly.
« Last Edit: 03/28/2017 04:34 pm by psloss »

Offline Flying Beaver

Re: Atlas V 401 - Cygnus CRS OA-7 - March 27, 2017
« Reply #81 on: 03/28/2017 04:36 pm »
NAC HEO meeting presentation says current target period is mid-April.  (I heard a 'NET' in there, but will have to relisten later.) Changing out hardware in booster engine compartment if I heard correctly.

NET  ;)

Jeff Foust‏
@jeff_foust


Robyn Gatens, as NAC HEO meeting resumes: targeting no earlier than mid-April for Cygnus OA-7 launch.
Watched B1019 land in person 21/12/2015.

Offline psloss

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Re: Atlas V 401 - Cygnus CRS OA-7 - March 27, 2017
« Reply #82 on: 03/28/2017 04:47 pm »
Target launch out there will also bump the USOS EVA that was dependent on a cargo item coming up in the Cygnus out into sounds like next increment.

Offline edkyle99

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 2017
« Reply #83 on: 03/28/2017 05:19 pm »
NAC HEO meeting presentation says current target period is mid-April.  (I heard a 'NET' in there, but will have to relisten later.) Changing out hardware in booster engine compartment if I heard correctly.
It is RD-180 hydraulics, then.  Possibilities include over-pressurization due to GSE issue, accidental introduction of contamination to hydraulic system, etc.  There is also the complication of the apparent use of kerosene fuel as the hydraulic fluid itself within this self-contained RD-180 TVC system.

 - Ed Kyle
« Last Edit: 03/28/2017 09:48 pm by edkyle99 »

Offline Sesquipedalian

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Re: Atlas V 401 - Cygnus CRS OA-7 - March 27, 2017
« Reply #84 on: 03/28/2017 05:24 pm »
NAC HEO meeting presentation says current target period is mid-April.  (I heard a 'NET' in there, but will have to relisten later.) Changing out hardware in booster engine compartment if I heard correctly.

All these delays are ironic in light of one of the primary reasons cited for going with an Atlas V for this launch, which was "NASA’s needs for enhanced schedule assurance".

Offline psloss

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 2017
« Reply #85 on: 03/28/2017 05:28 pm »
Adding slide from NAC HEO ISS status presentation.

Offline baldusi

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Re: Atlas V 401 - Cygnus CRS OA-7 - March 27, 2017
« Reply #86 on: 03/28/2017 07:06 pm »
NAC HEO meeting presentation says current target period is mid-April.  (I heard a 'NET' in there, but will have to relisten later.) Changing out hardware in booster engine compartment if I heard correctly.

All these delays are ironic in light of one of the primary reasons cited for going with an Atlas V for this launch, which was "NASA’s needs for enhanced schedule assurance".

It's not the same a 30 day delay due to a specific vehicle issue than a 6 to 8 month delays due to fleet stand down. Yes, Ariane 5 also have to contend with a week long strike. Payload issues are a much more important source of delays.

Offline edkyle99

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 2017
« Reply #87 on: 03/28/2017 09:29 pm »
NAC HEO meeting presentation says current target period is mid-April.  (I heard a 'NET' in there, but will have to relisten later.) Changing out hardware in booster engine compartment if I heard correctly.

All these delays are ironic in light of one of the primary reasons cited for going with an Atlas V for this launch, which was "NASA’s needs for enhanced schedule assurance".

It's not the same a 30 day delay due to a specific vehicle issue than a 6 to 8 month delays due to fleet stand down. Yes, Ariane 5 also have to contend with a week long strike. Payload issues are a much more important source of delays.
Yes.  This Atlas 5 will still be ready to fly before the next Antares.

 - Ed Kyle
« Last Edit: 03/28/2017 09:47 pm by edkyle99 »

Offline mainmind

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 2017
« Reply #88 on: 03/29/2017 02:45 pm »
NAC HEO meeting presentation says current target period is mid-April.  (I heard a 'NET' in there, but will have to relisten later.) Changing out hardware in booster engine compartment if I heard correctly.

All these delays are ironic in light of one of the primary reasons cited for going with an Atlas V for this launch, which was "NASA’s needs for enhanced schedule assurance".

It's not the same a 30 day delay due to a specific vehicle issue than a 6 to 8 month delays due to fleet stand down. Yes, Ariane 5 also have to contend with a week long strike. Payload issues are a much more important source of delays.
Yes.  This Atlas 5 will still be ready to fly before the next Antares.

 - Ed Kyle

My impression was that they went with the Atlas V for this launch for increased up-mass. Perhaps this was mentioned earlier in the thread and I missed it. Is there a problem with the Antares in manufacturing?

Let's hope this last-minute booster rework goes as smoothly as the TVC component change-out on SpX10 did. Spaceflightnow.com still shows a TBD for the OA-7 launch date. Hopefully the NET 14 April will solidify.

Offline edkyle99

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 2017
« Reply #89 on: 03/29/2017 03:55 pm »
My impression was that they went with the Atlas V for this launch for increased up-mass. Perhaps this was mentioned earlier in the thread and I missed it. Is there a problem with the Antares in manufacturing?
I believe you are correct about the up-mass capability.  This will help Orbital ATK meet its contract requirements.

The next Antares is slated to be ready for the OA-8 launch this summer.
https://forum.nasaspaceflight.com/index.php?topic=42553.msg1655681#msg1655681

 - Ed Kyle
« Last Edit: 03/29/2017 03:55 pm by edkyle99 »

Offline Steven Pietrobon

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 2017
« Reply #90 on: 03/31/2017 02:39 am »
ISS capcom Andrea Boyd reports on the Australia and Space Facebook that launch is NET 8 April.

"We were told NET 8th and if so capture/berthing NET 13th and therefore next EVA has been cancelled as it will be after exp49/50 crew depart"

« Last Edit: 03/31/2017 02:39 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Chris Bergin

Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 18 2017
« Reply #91 on: 04/03/2017 09:39 pm »
Orbital ATK say this is now NET April 18.
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Offline vapour_nudge

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 18 2017
« Reply #92 on: 04/03/2017 10:32 pm »
Link for the above statement by Chris Bergin is https://twitter.com/ulalaunch/status/849014057936064513

Offline ChrisGebhardt

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 18 2017
« Reply #93 on: 04/04/2017 01:33 am »
Orbital ATK say this is now NET April 18.

Yay for flight convergence.  This is two days after SpaceX's NROL mission is slated to launch.  No issue with a two day turnaround between these two launches.

Offline FutureSpaceTourist

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 18 2017
« Reply #94 on: 04/06/2017 03:11 pm »
Quote
Orbital ATK is proud and honored to name the OA-7 Cygnus cargo delivery spacecraft after former astronaut and U.S. Senator John Glenn

See attached.

Offline jacqmans

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 18 2017
« Reply #95 on: 04/07/2017 10:23 am »
Jacques :-)

Online gongora

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 18 2017
« Reply #96 on: 04/07/2017 01:19 pm »
We somehow ended up with two threads for this mission.  Let's use the thread in the ULA section to cover the launch, and the thread in the O/ATK section for payload/on-orbit discussion.

Offline ChrisC

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 18 2017 - Launch
« Reply #97 on: 04/07/2017 06:41 pm »
We somehow ended up with two threads for this mission.  Let's use the thread in the ULA section to cover the launch, and the thread in the O/ATK section for payload/on-orbit discussion.

FYI, this is the ULA thread he mentions; the Orbital/ATK thread is here.
« Last Edit: 04/07/2017 06:42 pm by ChrisC »
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Offline FutureSpaceTourist

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 18 2017 - Launch
« Reply #98 on: 04/09/2017 03:52 pm »

Offline FutureSpaceTourist

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Re: Atlas V 401 - Cygnus CRS OA-7 - NET April 18 2017 - Launch
« Reply #99 on: 04/11/2017 11:01 am »
Quote
Tory Bruno‏ Verified account @torybruno 2m2 minutes ago

On track for the 18th #OA7

https://twitter.com/torybruno/status/851751389646659584

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