Questions tagged [ariane]
Questions about the ESA launch Ariane. There were multiple versions, with Ariane 5 being active currently.
44 questions
1 vote
1 answer
297 views
Electricity used by Falcon 9
How much electricity is used in the entire production and launch process of Falcon 9 (launcher, propellant, etc.)? What about other rockets, like the Ariane 5?
- 21
6 votes
1 answer
1k views
Ariane 6 upper stage schematic showing integration of APU
I've been reading about the Auxiliary Power Unit (APU) on the Ariane 6 upper stage and am looking for a schematic showing how it's integrated into the stage. From Thermal Control of the Cryogenic ...
- 198k
2 votes
2 answers
602 views
Why is the Ariane 5 shorter than the Ariane 4?
Looking at below image, which compares heights of rockets, I couldn’t help but notice that the Ariane 5 was a short and fat rocket compared to the Ariane 4 (tall and thin). Why would this be ...
10 votes
2 answers
3k views
What does the Ariane 5 rocket use to turn?
I noticed that the Ariane 5 does not have wings. It also does not have RCS thrusters except for sometimes with its payload, but that is not being used during liftoff. I tried to find some methods it ...
- 7,095
6 votes
1 answer
1k views
How much fuel did JWST save due to an accurate launch, and how much will remain after L2 orbit?
How much fuel did JWST save due to an accurate Arianne 5 launch, and how much fuel will be remaining after JWST L2 orbital insertion? And how many years is that fuel expected to last? According to ...
- 555
2 votes
1 answer
469 views
Why is Ariane-5's upper stage appear to vent exhaust post engine cut off?
I was surprised to see, with unaided eyes, a rocket like object in the skies on Dec 25, 2021 (Indian time) around the same time as JWST launch. My coordinates were approximately ...
- 4,497
4 votes
1 answer
223 views
How long does it take for Ariane 5 to roll to the launch pad?
The launchpad is 2800 m away from the building where Ariane 5 is assembled. Based on the Ariane 5 user manual, Section 7.5.5, Figure 7.5.5.4.b, the Ariane 5 transfer to launchpad happens one day ...
- 5,138
5 votes
1 answer
468 views
Is the Ariane 5 rolled out or is the hangar moved away?
Ariane 5 rockets (like the one carrying the JWST) are assembled upright in a hangar, but during the launch (obviously) the hangar is no longer around the rocket. Does the Ariane 5 roll out of the ...
- 5,138
10 votes
1 answer
656 views
What happens if Ariane V actually fails while launching JWST?
Obviously, I don't expect this. But I was thinking about it, and the importance, uniqueness, and irreplaceability of this payload is almost (?) unprecedented, especially for a transnational project. I ...
- 11.8k
3 votes
0 answers
213 views
Rocket Engine - Actuator in Loop Simulations
For Actuator-In-Loop simulations, why are the rocket engine nozzles along with the thrust vector control assembly (including the actuators) kept inverted on a platform like in the attached image or as ...
- 101
3 votes
1 answer
237 views
Does RUAG Space recover and reuse Ariane 5 and Atlas V payload fairings after splashdown?
RUAG Space is the company that manufactures payload fairings for the Ariane, Vega, Atlas V (500 series) and the upcoming Vulcan. Back when Spacex started trying to catch the fairing without it hitting ...
- 5,545
8 votes
1 answer
141 views
Increase in period and semi-major axis following near head-on collision between Cerise and Ariane debris (1996)
This report describes the collision of the French satellite Cerise with a piece of Ariane rocket debris (object no. 18208) in 1996: http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?...
- 81
1 vote
1 answer
355 views
Will Ariane 5 ECA have LES for the launch of JWST?
Ariane 5 rocket is contracted to launch JWST. This rocket has approximately one failure out of every fifty launches (excluding minor failure). JWST has already taken many years and it is next ...
- 1,556
12 votes
1 answer
1k views
Why does the core stage of the Ariane 5 produce more thrust in vacuum?
In listening to a youtube video that was discussing the Ariane 5, the narrator noted briefly in passing that the Vulcain 2 engine produced more power thrust in a vacuum than it did at sea level. Not ...
- 1,183
7 votes
2 answers
508 views
Does Arianespace have a modified Soyuz launch vehicle?
Ars Technica's OneWeb joins the satellite Internet gold rush this week says: The company chose to partner with Arianespace and its modified Soyuz launch vehicle for the 2020 launches because, ...
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