Author Topic: ESA - Ariane 6 Updates  (Read 151899 times)

Offline jacqmans

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Re: ESA - Ariane 6 Updates
« Reply #280 on: 01/19/2019 09:11 am »

Online brickmack

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Re: ESA - Ariane 6 Updates
« Reply #281 on: 01/19/2019 06:06 pm »


In the first attached presentation, it shows SSO rideshare with orbit 1 at 800x800 km x 98.6 degrees, and orbit 2 at 650x650km x 97.98 degrees. Why isn't it the other way around? Seems like they're wasting a lot of performance carrying the second payload to a higher altitude and higher inclination than it needs to go to, only to bring it back down to release it at its target orbit.

Offline RedLineTrain

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Re: ESA - Ariane 6 Updates
« Reply #282 on: 01/19/2019 07:32 pm »
Arianespace says full Ariane 6 production held up by missing government contracts

https://spacenews.com/arianespace-says-full-ariane-6-production-held-up-by-missing-government-contracts/

Offline calapine

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Re: ESA - Ariane 6 Updates
« Reply #283 on: 01/19/2019 07:34 pm »


In the first attached presentation, it shows SSO rideshare with orbit 1 at 800x800 km x 98.6 degrees, and orbit 2 at 650x650km x 97.98 degrees. Why isn't it the other way around? Seems like they're wasting a lot of performance carrying the second payload to a higher altitude and higher inclination than it needs to go to, only to bring it back down to release it at its target orbit.

Since the upper-stage will be de-orbited they need to go down anyways.

Offline envy887

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Re: ESA - Ariane 6 Updates
« Reply #284 on: 01/19/2019 10:19 pm »
Arianespace says full Ariane 6 production held up by missing government contracts

https://spacenews.com/arianespace-says-full-ariane-6-production-held-up-by-missing-government-contracts/

Is that going to affect the first launch date?

Offline Steven Pietrobon

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Re: ESA - Ariane 6 Updates
« Reply #285 on: 01/20/2019 02:58 am »
In the first attached presentation, it shows SSO rideshare with orbit 1 at 800x800 km x 98.6 degrees, and orbit 2 at 650x650km x 97.98 degrees. Why isn't it the other way around? Seems like they're wasting a lot of performance carrying the second payload to a higher altitude and higher inclination than it needs to go to, only to bring it back down to release it at its target orbit.

I believe its because they want to make sure they deploy the primary payload first. There is a small risk associated with each burn, so they want the primary payload to have the minimum number of burns.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline SciNews

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Re: ESA - Ariane 6 Updates
« Reply #286 on: 01/23/2019 04:06 pm »
Reuters: Europe's Arianespace takes on SpaceX by cutting Ariane 5 rocket launch price
https://www.reuters.com/article/us-arianespace-asia/europes-arianespace-takes-on-spacex-by-cutting-ariane-5-rocket-launch-price-idUSKCN1PH0Q9
Quote
Arianespace is aiming for the cost of launching the Ariane 6 to fall by around 40 percent versus the Ariane 5 through design changes and higher volume production, bringing its prices more in line with Elon Musk’s SpaceX, Arianespace Managing Director and Head of Sales for Asia-Pacific Vivian Quenet said.
He said in current marketing campaigns, the company is offering customers such as telecoms an Ariane 5 launch for the same price as the Ariane 6.
“We have made a lot of effort on the sales price. When we do that, the result is very positive,” Quenet told reporters on Wednesday, declining to discuss details of profitability.

Offline Chris Bergin

Re: ESA - Ariane 6 Updates
« Reply #287 on: 01/29/2019 02:00 pm »
ARTICLE: Successful P120C test another milestone towards Arianespace's new rockets -

https://www.nasaspaceflight.com/2019/01/p120c-test-milestone-arianespaces-new-rockets/

- By Justin Davenport

https://twitter.com/NASASpaceflight/status/1090263305443110912

Offline SciNews

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Re: ESA - Ariane 6 Updates
« Reply #288 on: 01/31/2019 07:24 pm »
ELA4 January 2019

Offline hektor

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Offline jpo234

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« Last Edit: 02/06/2019 12:46 pm by jpo234 »
You want to be inspired by things. You want to wake up in the morning and think the future is going to be great. That's what being a spacefaring civilization is all about. It's about believing in the future and believing the future will be better than the past. And I can't think of anything more exciting than being out there among the stars.

Online ZachS09

Re: ESA - Ariane 6 Updates
« Reply #291 on: 02/06/2019 02:04 pm »
Europe’s Ariane 6 Rocket Is Doomed Even Before First Flight, Auditor Finds

So, is the article saying that Ariane 6 will be cancelled before its maiden voyage, or will they fly a certain number of them before calling it quits?

I know the title gives away the answer, but I would like to make sure that what the article said is actually true.
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Offline FutureSpaceTourist

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Re: ESA - Ariane 6 Updates
« Reply #292 on: 02/06/2019 06:03 pm »
As usual I think Eric Berger has a more correct and nuanced report:

Quote
French auditor says Ariane 6 rocket too conventional to compete with SpaceX
"This new launcher does not constitute a sustainable response."

ERIC BERGER - 2/6/2019, 6:04 PM

France's independent state auditor, the Cour des comptes, has raised concerns about the viability of Europe's new rocket, the Ariane 6 launcher. In its 2019 annual report, the auditor said the France-based launch company Arianespace is also being too cautious as it grapples with competitors like the US-based SpaceX.

https://arstechnica.com/science/2019/02/french-auditor-says-ariane-6-rocket-too-conventional-to-compete-with-spacex/

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