Author Topic: Eutelsat OneWeb: Constellation - General Thread  (Read 682220 times)

Offline Jim

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Why is Falcon the first assumption?

Online meekGee

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Why is Falcon the first assumption?

Because it's the most frequent launcher, the cheaper launcher, and the company behind it is clearly flexible.

Basically it's the go-to launcher.

The biggest question is whether SpaceX would want to fly a competitor, and IMO they'd have no problem doing it - mostly because they don't see OneWeb as a dangerous competitor.

I'm pretty sure OneWeb is over the "Anyone but SpaceX" mentality too.
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Online DanClemmensen

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Why is Falcon the first assumption?
In your opinion, what other launchers should be considered, and how do they compare?

Offline smoliarm

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I have some questions about the batch of OneWeb sats which got stuck at Baikonur.
In general, assuming the launch will not happen - what would be routine for returning them home?
Do they have hydrazine propulsion for initial orbit raising?
What they have to do with Xe tanks before transportation?

Online matthewkantar

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No need to use Falcons or wait around for A6 or Vulcan, Rogozin is laying out future launch architecture in dribs and drabs. Once trampoline first stage and second stage broom tech are figured out, deets on fairings and whatnot should be forthcoming.

Offline rubicondsrv

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In your opinion, what other launchers should be considered, and how do they compare?

gslv and pslv come to mind, especially with the connections between oneweb and India.   

depending on how long the launches can be delayed for there are also ariane 6 and h3.

vulcan might also be an option

f9 is not the only option. 

it is quite likely oneweb will have to spread the launches over several launchers in order to stay somewhat on schedule.   

they need to place at least 6 launches in a rushed fashion, that will not be easy to do within existing schedules
« Last Edit: 03/03/2022 06:40 pm by rubicondsrv »

Offline markbike528cbx

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But SpaceX would happily launch OneWeb at a reasonable price.

And, just for laughs, clean off the booster soot enough to read "Broomstick"  in English and Russian, just to make sure the joke is clear- per Rogozin rant/tweet.
-Edit to add Russian version of Broomstick.
« Last Edit: 03/03/2022 07:05 pm by markbike528cbx »

Offline Robotbeat

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Why is Falcon the first assumption?
Because it is the world’s workhorse right now, particularly for LEO, and it’s not even close.

Russia not an option. China has the same kind of risks. All Atlas Vs and Ariane 5s are accounted for…

Falcon 9 launches more mass to orbit last year than the rest of the world combined, is lower cost per kg than anyone, and is the most reliable launch vehicle. And isn’t reliant on either China nor Russia.

India alone makes some sense, but they don’t have the launch rate yet. Or using a new launcher that hasn’t launched yet.
« Last Edit: 03/03/2022 06:53 pm by Robotbeat »
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Offline Robotbeat

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I have some questions about the batch of OneWeb sats which got stuck at Baikonur.
In general, assuming the launch will not happen - what would be routine for returning them home?
Do they have hydrazine propulsion for initial orbit raising?
What they have to do with Xe tanks before transportation?
good chance Russia will just steal them like they are the airliners they leased.
Chris  Whoever loves correction loves knowledge, but he who hates reproof is stupid.

To the maximum extent practicable, the Federal Government shall plan missions to accommodate the space transportation services capabilities of United States commercial providers. US law http://goo.gl/YZYNt0

Online DanClemmensen

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Speculation: A possible problem with using F9: SpaceX any not have any spare F9 flights this year. Elon told us he was counting on Starship to launch a bunch of Starlinks, but Starship seems to be slipping. If SpaceX really needs those Starlinks as badly as Elon stated, All the F9s may be booked for 2022.

How many F9 launches are possible in 2022? They are probably limited by the turnaround time of the barges, even in the likely event that Hawthorne can produce enough boosters and second stages. Furthermore, Oneweb uses polar orbits, which I think usually launch from Vandenberg.

Offline SweetWater

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Switching to anything other than a Soyuz would require OneWeb either design, build, and test a new mount/dispenser for the satellites or at the very least adapt the one intended for use with Soyuz. I do not know how long that would take, but several months at least seems like a reasonable guess.

OneWeb was planning to complete the constellation this year, and IMO regardless of what launch vehicle /combination of launch vehicles they choose to replace Soyuz, their odds of achieving that are effectively shot.
 

Offline markbike528cbx

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At Baikonur, work according to the schedule of the second launch day has been completed. According to the results of viewing the telemetric information, there are no comments. Everything is regular. Tomorrow morning at 10.00, at a meeting of the commission at Baikonur, a decision will be made on the advisability of continuing work with a foreign customer.

https://twitter.com/Rogozin/status/1499385895434207234
  Is it just me or is there a "Godfather" vibe here?

Offline Robotbeat

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Speculation: A possible problem with using F9: SpaceX any not have any spare F9 flights this year. Elon told us he was counting on Starship to launch a bunch of Starlinks, but Starship seems to be slipping. If SpaceX really needs those Starlinks as badly as Elon stated, All the F9s may be booked for 2022.

How many F9 launches are possible in 2022? They are probably limited by the turnaround time of the barges, even in the likely event that Hawthorne can produce enough boosters and second stages. Furthermore, Oneweb uses polar orbits, which I think usually launch from Vandenberg.
no Gen1/1.5 Starlinks were planned on Starship IIRC, and I think they stopped working on the Plan B of gen2 on Falcon 9, so they should in principle have ability to spool up for more launches this year. SpaceX is pretty responsive to things like this.


EDIT: also, they could perhaps launch them on a smallsat launch, which often has extra capacity, like they did with those ~10 Starlinks that one time.
« Last Edit: 03/03/2022 07:11 pm by Robotbeat »
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Offline alanr74

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Switching to anything other than a Soyuz would require OneWeb either design, build, and test a new mount/dispenser for the satellites or at the very least adapt the one intended for use with Soyuz. I do not know how long that would take, but several months at least seems like a reasonable guess.

OneWeb was planning to complete the constellation this year, and IMO regardless of what launch vehicle /combination of launch vehicles they choose to replace Soyuz, their odds of achieving that are effectively shot.

Even a few months wouldn't be a disaster if SpaceX can launch more often, but without knowing how long that sort of design would take, or if SpaceX has availability we're just not going to find out.

I doubt OneWeb will be forthcoming with sensitive information like this.

Online butters

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Why is Falcon the first assumption?
While many speculate about SpaceX being reluctant to help OneWeb, what are the odds that Amazon Kuiper would helpfully offer OneWeb six of their nine Atlas Vs so they can complete their constellation? Kuiper's not ready to launch this year. OneWeb is. ULA has plenty of spare launch capacity with Atlas, it's significantly underutilized at the moment. So as a reasonable and pragmatic person, Bezos stops bogarting the boosters. How believable is this outcome?

Offline Robotbeat

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Why is Falcon the first assumption?
While many speculate about SpaceX being reluctant to help OneWeb, what are the odds that Amazon Kuiper would helpfully offer OneWeb six of their nine Atlas Vs so they can complete their constellation? Kuiper's not ready to launch this year. OneWeb is. ULA has plenty of spare launch capacity with Atlas, it's significantly underutilized at the moment. So as a reasonable and pragmatic person, Bezos stops bogarting the boosters. How believable is this outcome?
There are a limited number of RD-180s available. When those are done, Atlas V, one of the most reliable launch vehicles ever, is done.  Vulcan can’t replicate that until having a longer flight history.

So I doubt it. Also, Atlas V price is much higher, especially per kg to LEO.
« Last Edit: 03/03/2022 07:20 pm by Robotbeat »
Chris  Whoever loves correction loves knowledge, but he who hates reproof is stupid.

To the maximum extent practicable, the Federal Government shall plan missions to accommodate the space transportation services capabilities of United States commercial providers. US law http://goo.gl/YZYNt0

Online butters

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Why is Falcon the first assumption?
While many speculate about SpaceX being reluctant to help OneWeb, what are the odds that Amazon Kuiper would helpfully offer OneWeb six of their nine Atlas Vs so they can complete their constellation? Kuiper's not ready to launch this year. OneWeb is. ULA has plenty of spare launch capacity with Atlas, it's significantly underutilized at the moment. So as a reasonable and pragmatic person, Bezos stops bogarting the boosters. How believable is this outcome?
There are a limited number of RD-180s available. When those are done, Atlas V, one of the most reliable launch vehicles ever, is done.  Vulcan can’t replicate that until having a longer flight history.

So I doubt it. Also, Atlas V price is much higher, especially per kg to LEO.
Exactly. So this is why, in response to Jim's question, people tend to assume Falcon. Atlas V and Ariane 5/6 are in a similar situation where the remaining units are spoken for and the replacements aren't ready yet. ULA and Arianespace are in a quandary. Who knows if ISRO can deliver. The only reliable regularly-launching providers in the entire world right now are SpaceX and Rocket Lab. The others have all face-planted or never had any reasonable cadence to begin with. It's a sucky situation, but it is what it is.

Online DanClemmensen

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Switching to anything other than a Soyuz would require OneWeb either design, build, and test a new mount/dispenser for the satellites or at the very least adapt the one intended for use with Soyuz. I do not know how long that would take, but several months at least seems like a reasonable guess.

OneWeb was planning to complete the constellation this year, and IMO regardless of what launch vehicle /combination of launch vehicles they choose to replace Soyuz, their odds of achieving that are effectively shot.
Back in 2015, Oneweb created a customizable generic dispenser design so they could very quickly customize it for specific LVs as part of the LV cost tradeoff analyses. Back then, a specific customized design was simple. Of course, those were not "real" designs, and I do not know if any elements of the actual Soyuz dispenser design were back-ported into the generic design, so they probably cannot just pull down one of the old CAD files and go, but it's clear from the pictures that the basic ideas are still there.

Online matthewkantar

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Speculation: A possible problem with using F9: SpaceX any not have any spare F9 flights this year. Elon told us he was counting on Starship to launch a bunch of Starlinks, but Starship seems to be slipping. If SpaceX really needs those Starlinks as badly as Elon stated, All the F9s may be booked for 2022.

How many F9 launches are possible in 2022? They are probably limited by the turnaround time of the barges, even in the likely event that Hawthorne can produce enough boosters and second stages. Furthermore, Oneweb uses polar orbits, which I think usually launch from Vandenberg.
no Gen1/1.5 Starlinks were planned on Starship IIRC, and I think they stopped working on the Plan B of gen2 on Falcon 9, so they should in principle have ability to spool up for more launches this year. SpaceX is pretty responsive to things like this.


EDIT: also, they could perhaps launch them on a smallsat launch, which often has extra capacity, like they did with those ~10 Starlinks that one time.

Can they book SpaceX Transporter flights? At~2 million a pop at most, which is a reasonable guess from SpaceX's web site, it would seem to be competitive with Soyuz. Am not sure about how orbits would work out squeezing them onto scheduled flights here and there? Is a funny idea to me because OneWeb can book all of the untaken spots, and because it is an open offering, SpaceX would be stepping on a monopoly land mine if they decline.

Offline Lars-J

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Speculation: A possible problem with using F9: SpaceX any not have any spare F9 flights this year. Elon told us he was counting on Starship to launch a bunch of Starlinks, but Starship seems to be slipping. If SpaceX really needs those Starlinks as badly as Elon stated, All the F9s may be booked for 2022.

How many F9 launches are possible in 2022? They are probably limited by the turnaround time of the barges, even in the likely event that Hawthorne can produce enough boosters and second stages. Furthermore, Oneweb uses polar orbits, which I think usually launch from Vandenberg.
no Gen1/1.5 Starlinks were planned on Starship IIRC, and I think they stopped working on the Plan B of gen2 on Falcon 9, so they should in principle have ability to spool up for more launches this year. SpaceX is pretty responsive to things like this.


EDIT: also, they could perhaps launch them on a smallsat launch, which often has extra capacity, like they did with those ~10 Starlinks that one time.

Can they book SpaceX Transporter flights? At~2 million a pop at most, which is a reasonable guess from SpaceX's web site, it would seem to be competitive with Soyuz. Am not sure about how orbits would work out squeezing them onto scheduled flights here and there? Is a funny idea to me because OneWeb can book all of the untaken spots, and because it is an open offering, SpaceX would be stepping on a monopoly land mine if they decline.

No, *IF* flying with SpaceX they would have to be dedicated flights due to the target orbit (1200km polar at 86.4 degrees) which is not SSO (~700km at 98 degrees) - like all Transporter missions so far.
« Last Edit: 03/03/2022 08:58 pm by Lars-J »

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