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KarelXWB
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ESA - Tests, Launches, Developments

Thu Jan 25, 2018 8:46 am

More exciting space news this week as ESA has successfully fired the Ariane 6 engine for the first time.

Video: https://youtu.be/YN8_lwDl680

Press release: http://www.ariane.group/en/news/successful-first-test/

The Vulcain®2.1 engine, which will power the main stage of Ariane 6, has completed a successful first test firing
The test was carried out on behalf of ArianeGroup by the DLR (German Aerospace Center) at its Lampoldshausen site
This is a version of the Ariane 5 Vulcain®2 engine optimized for Ariane 6
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moo
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Re: SpaceX - Tests, Launches, Developments

Fri Jan 26, 2018 12:54 am

Contact has been lost with the payloads of the Ariane 5 launch today, after the vehicle stopped responding to ground control after stage separation.
 
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casinterest
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Re: SpaceX - Tests, Launches, Developments

Fri Jan 26, 2018 2:41 am

moo wrote:
Contact has been lost with the payloads of the Ariane 5 launch today, after the vehicle stopped responding to ground control after stage separation.


Per recent report: All is well.

https://spaceflightnow.com/2018/01/25/v ... us-center/
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autothrust
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Re: Successful first test of the Ariane 6 Vulcain 2.1 engine

Fri Jan 26, 2018 12:40 pm

Thanks for sharing this news. It will be interesting to see this engine work when Ariane 6 will fly in 2020.
Flown on: DC-9, MD-80, Fokker 100, Bae 146 Avro, Boeing 737-300, 737-400, 747-200, 747-300,747-400, 787-9, Airbus A310, A319, A320, A321, A330-200,A330-300, A340-313, A380, Bombardier CSeries 100/300, CRJ700ER/CRJ900, Embraer 190.
 
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Nomadd
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Re: SpaceX - Tests, Launches, Developments

Fri Jan 26, 2018 6:02 pm

moo wrote:
Contact has been lost with the payloads of the Ariane 5 launch today, after the vehicle stopped responding to ground control after stage separation.

The payloads never had a problem and the vehicle doesn't "respond" in any case. They just lost the telemetry stream from the stage for a few minutes. Not that it has anything to do with SpaceX.
 
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77west
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Re: SpaceX - Tests, Launches, Developments

Fri Jan 26, 2018 7:44 pm

Nomadd wrote:
moo wrote:
Contact has been lost with the payloads of the Ariane 5 launch today, after the vehicle stopped responding to ground control after stage separation.

The payloads never had a problem and the vehicle doesn't "respond" in any case. They just lost the telemetry stream from the stage for a few minutes. Not that it has anything to do with SpaceX.


Apparently they were released in not quite the correct orbit, but the satellites can make up for this with their own fuel and still achieve mission objectives.
77West - AW109S - BE90 - JS31 - B1900 - Q300 - ATR72 - DC9-30 - MD80 - B733 - A320 - B738 - A300-B4 - B773 - B77W
 
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Nomadd
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Re: SpaceX - Tests, Launches, Developments

Fri Jan 26, 2018 8:17 pm

77west wrote:
Nomadd wrote:
moo wrote:
Contact has been lost with the payloads of the Ariane 5 launch today, after the vehicle stopped responding to ground control after stage separation.

The payloads never had a problem and the vehicle doesn't "respond" in any case. They just lost the telemetry stream from the stage for a few minutes. Not that it has anything to do with SpaceX.


Apparently they were released in not quite the correct orbit, but the satellites can make up for this with their own fuel and still achieve mission objectives.

True. I posted before getting the latest information. I've cussed out people for that too often to be doing it myself.
 
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moo
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Re: SpaceX - Tests, Launches, Developments

Fri Jan 26, 2018 8:22 pm

Nomadd wrote:
moo wrote:
Contact has been lost with the payloads of the Ariane 5 launch today, after the vehicle stopped responding to ground control after stage separation.

The payloads never had a problem and the vehicle doesn't "respond" in any case. They just lost the telemetry stream from the stage for a few minutes. Not that it has anything to do with SpaceX.


Well, I'm sorry that I posted breaking news as it happened (and we have discussed non-SpaceX stuff in this thread before) which turned out to have wrong details but was generally right anyway.

They lost telemetry, attempts to signal the stage to switch to other methods failed (vehicles are supposed to respond to basic "make contact again" calls - it's not a straight dumb telemetry feed as you suggest) and the payloads were not acquired by ground stations for some time after deployment - they have also been put in wrong orbits and require moving to get into correct ones, in that they need to get from their current 20-degree inclinations to their planned 3-degree inclinations, which is a huge miss.

Are you planning on fact checking every one of my posts from now on?
 
WIederling
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Re: Successful first test of the Ariane 6 Vulcain 2.1 engine

Sat Jan 27, 2018 11:53 am

I've look around but ran dry while looking for performance differences between the Vulcain 2 and 2.1 versions.
Anybody got a hint?

What I found is the new 3D printed nozzle from GKN:
https://www.gkn.com/en/newsroom/news-re ... launchers/
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Francoflier
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Re: Successful first test of the Ariane 6 Vulcain 2.1 engine

Sat Jan 27, 2018 12:19 pm

I have no more information on performance than you do, but I believe the engine will retain similar thrust and Isp.

Apparently most of the (re)design effort went into making it cheaper and faster to produce.
Redesigned nozzle, use of 3D printed parts, discontinued usage of internal igniters and no more liquid helium tank pressurization (in favor of using heated oxygen from the combustion lines)...

Arianespace / ESA obviously do not have the fund to enter the reusable game, so they're going for cheap and disposable.
I hope it works out.

http://www.esa.int/Our_Activities/Space ... rst_firing
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Nomadd
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Re: SpaceX - Tests, Launches, Developments

Sat Jan 27, 2018 10:35 pm

Best guess is that the fuel used to get to the correct orbit will cost SES-14 about 5 years of life expectancy, but it should still have enough to complete it's 15 year design life.
Last edited by Nomadd on Sat Jan 27, 2018 10:54 pm, edited 1 time in total.
 
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Nomadd
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Re: SpaceX - Tests, Launches, Developments

Sat Jan 27, 2018 10:41 pm

Final post on this splinter thread. There's still some guessing because Ariane not only fails to give complete updates, they actually gave out incorrect information. The 2nd stage went off course as soon as it fired up. Loss of telemetry may have been simply because the dishes were pointed to the course it should have been on and not the one it was. Same with the delayed payload contact, which can't happen until the payloads are deployed.
 
parapente
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Re: SpaceX - Tests, Launches, Developments

Sun Jan 28, 2018 9:15 am

Ariane.
In a perverse way I am glad this happened now and not on the James Webb launch!!!
Hopefully they will figure out exactly why the second stage went off on the wrong angle (not altitude).and correct any potential fault.

As above from what I have read both these payloads (given time) will get to their intended positions.
 
mxaxai
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Re: Successful first test of the Ariane 6 Vulcain 2.1 engine

Sat Jun 16, 2018 2:18 pm

Francoflier wrote:
I have no more information on performance than you do, but I believe the engine will retain similar thrust and Isp.

Apparently most of the (re)design effort went into making it cheaper and faster to produce.
Redesigned nozzle, use of 3D printed parts, discontinued usage of internal igniters and no more liquid helium tank pressurization (in favor of using heated oxygen from the combustion lines)...

Arianespace / ESA obviously do not have the fund to enter the reusable game, so they're going for cheap and disposable.
I hope it works out.

http://www.esa.int/Our_Activities/Space ... rst_firing

On that topic, ESA just test fired their "ETID" engine, which may be used for the Ariane 6 upper stage in a future upgrade. It could also serve as the main engine for smaller rockets. In addition to a new LH2 expansion system, it features more 3D printing, laser igniters and further optimisations.

http://www.esa.int/Our_Activities/Space ... ket_engine
Further reading: https://www.esa.int/Our_Activities/Spac ... ies/(print)

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