Orbital ATK

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MartG

Original Poster:

21,240 posts

211 months

Friday 13th April 2018
quotequote all
Orbital ATK is hopeful that its Next Generation Launcher will get a contract to launch military payloads

https://spaceflightnow.com/2018/04/12/orbital-atk-...

The design looks to me a bit reminiscent of the old idea of an SRB based launcher

Eric Mc

122,856 posts

272 months

Friday 13th April 2018
quotequote all
Solid propellant rockets is their forté. Interestingly, the article states that the rocket bodies would be composite rather than metal. Before the Challenger accident, Morton Thiokol (as it was known back then) were working on a wound filament design for the Shuttle SRBs. After the accident, they abandoned that plan.

However, I bet that a lot of the work that was done on that programme will be incorporated, suitably updated, in these new of generation solid rocket boosters.

MartG

Original Poster:

21,240 posts

211 months

Friday 13th April 2018
quotequote all
Yes - I suspect that, if SLS survives that long, the Block 2 version will use filament wound SRBs too ( as ATK's political clout seems to have killed off any liquid fuelled competitor frown )

Eric Mc

122,856 posts

272 months

Friday 13th April 2018
quotequote all
It was the need to make add on boosters reusable that helped swing NASA to chose SRBs for the Shuttle programme rather than LRBs. As these SRBs won't be reused, they have lost one of their prime advantages - i.e. cost of refurbishment.

MartG

Original Poster:

21,240 posts

211 months

Friday 13th April 2018
quotequote all
Yes - NASA really need to start thinking outside the box, and look at liquid fuelled boosters capable of landing back in a similar manner to the Falcon 9. In addition to the cost implications, NASA is running the risk of losing its image as an innovator by continuing to develop throwaway launch vehicles

Eric Mc

122,856 posts

272 months

Friday 13th April 2018
quotequote all
Especially deciding to throw something away that had originally been designed to be recovered.

MartG

Original Poster:

21,240 posts

211 months

Friday 13th April 2018
quotequote all
Yes - though at the flight rate expected for SLS maintaining the recovery infrastructure ( ships & maintenance, crew, refurb workforce etc. ) would be even more uneconomical than it was for the Shuttle - I read somewhere that worked out over the life of the Shuttle programme it would have been much cheaper to just ditch the SRBs.

Eric Mc

122,856 posts

272 months

Friday 13th April 2018
quotequote all
MartG said:
Yes - though at the flight rate expected for SLS maintaining the recovery infrastructure ( ships & maintenance, crew, refurb workforce etc. ) would be even more uneconomical than it was for the Shuttle - I read somewhere that worked out over the life of the Shuttle programme it would have been much cheaper to just ditch the SRBs.
Maybe they should have aimed to up the flight rate. The more you do something, the cheaper it gets.

MartG

Original Poster:

21,240 posts

211 months

Friday 13th April 2018
quotequote all
That was the original plan with the Shuttle - but of course it didn't quite work out that way, with a flight rate way lower than advertised even when it wasn't grounded

MartG

Original Poster:

21,240 posts

211 months

Tuesday 17th April 2018
quotequote all
Orbital ATK has officially unveiled the name of it's Next Generation Launch Vehicle for the USAF's Evolved Expendable Launch Vehicle Program: Omega (on the right of the diagram)



The core can support up to 6 solid rocket boosters, and will have a 5 meter payload fairing



No specs for LEO performance, as its target market is for geosynchronous satellites - 11.13 tons to GTO, 8.5 tons to GEO

RobDickinson

31,343 posts

261 months

Tuesday 17th April 2018
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So 3 tons more than expendable f9 or under half reusable fh.

Looks like a decent old school rocket

MartG

Original Poster:

21,240 posts

211 months

Tuesday 17th April 2018
quotequote all
RobDickinson said:
So 3 tons more than expendable f9 or under half reusable fh.

Looks like a decent old school rocket
F9 Block 5 may reduce the margin a little

RobDickinson

31,343 posts

261 months

Tuesday 17th April 2018
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I think they'll do what they can to avoid expending block 5 rockets.

MartG

Original Poster:

21,240 posts

211 months

Tuesday 17th April 2018
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Growth potential ? jester


MartG

Original Poster:

21,240 posts

211 months

Tuesday 24th April 2018
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"We are excited to announce that we are targeting Sunday, May 20 for the launch of our OA-9 mission to the International Space Station! The 5-minute window will open at 5:04 a.m. EDT. Our Cygnus spacecraft is scheduled to launch aboard an Antares rocket for the seventh time from NASA’s Wallops Flight Facility in Virginia. Cygnus will deliver vital equipment, supplies and scientific equipment to the space station as part of the company’s Commercial Resupply Services (CRS) contract with NASA. Today, the Antares launch vehicle is integrated, initial cargo has been loaded and the Cygnus spacecraft is ready for fueling. Read more on our website"




MartG

Original Poster:

21,240 posts

211 months

Wednesday 9th May 2018
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Orbital ATK's first nine Cygnus cargo spacecraft were christened for late astronauts who worked for the company or who helped advance U.S. spaceflight. For its tenth Cygnus' namesake, Orbital ATK has chosen their late vice chairman.

The "S.S. J.R. Thompson" will launch as a memorial to the executive who also served as NASA's deputy administrator and helped develop rocket engines for the Saturn V and the space shuttle.


MartG

Original Poster:

21,240 posts

211 months

Monday 21st May 2018
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Antares and Cygnus going vertical on Launch Pad 0A on Wallops Island.


MartG

Original Poster:

21,240 posts

211 months

Monday 21st May 2018
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Livestream here https://www.youtube.com/watch?v=wwMDvPCGeE0

launch due 9:44 BST

Eric Mc

122,856 posts

272 months

Monday 21st May 2018
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Watching at the moment. Nice to see a Wallops Island launch.

MartG

Original Poster:

21,240 posts

211 months

Monday 21st May 2018
quotequote all
Yes - I only just found about the launch 20 mins ago smile