Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [ariane]

Questions about the ESA launch Ariane. There were multiple versions, with Ariane 5 being active currently.

1
vote
0answers
71 views

Does this rocket engine test run look healthy?

The new Ariane 6's upper stage engine "Vinci" is expected to challenge the RL-10C, which is currently the most efficient chemical rocket engine on the market. The European aerospace conglomerate aims ...
1
vote
1answer
82 views

Has foam loss been observed in Ariane 5 launches?

Ariane 5 is similar to the Space Shuttle in that both vehicles are powered by SRBs and use foam insulation in cryogenic tanks. Foam shedding has been a common occurrence during the history of the ...
5
votes
0answers
68 views

Ariane 4 Random Vibration

In the plot above, taken from space craft system engineering book, chapter 2. This is the plot showing the random vibration power spectrum of Ariane 4. The unit is $g^2/Hz$, I understand how the ...
8
votes
2answers
2k views

Why do Ariane rockets not have ice break off on liftoff?

In a recent question asked here, it was asked what debris falling from a Rocket Lab Electron Rocket was during launch. e.g.: The answer, was that it was ice that had formed after cryogenic fuel/...
8
votes
1answer
154 views

Why aren't the Ariane 5's SRBs reused?

The Ariane 5 uses two solid rocket boosters (SRBs), which can be recovered by parachute if desired. However, unlike (for instance) the space shuttle SRBs, Ariane 5 SRBs are only occasionally ...
4
votes
1answer
137 views

How to identify loads for a Payload Adapter System during Rocket Launch?

Good afternoon, A classmate and me are doing a project for university in which I have to perform several structural analysis of the Payload Adaptar System 937C from Ariane V (picture shown). The ...
10
votes
1answer
316 views

Are all payload fairings this floppy?

When I watched the launch of HYLAS-4 and Superbird-B3 on Ariane 5 ECA, for a moment it seemed that ESA is also experimenting with fairing recovery - with a fairing which flaps its wings and flies like ...
17
votes
2answers
4k views

Will the James Webb Space Telescope be insured against launch failure?

Most commercial satellites are insured in case something happens on launch. Although the Ariane 5 is a fairly reliable rocket, a launch failure is not out of the question. While other questions have ...
3
votes
1answer
190 views

Which of these configurations is preferred and why?

I came across an article with the following infographic: infographic source The GSLV rockets use solid/liquid engines as core stage and cryogenic engine as upper stage while the Ariane V rocket has ...
2
votes
0answers
63 views

Why do rockets sometimes climbs down before reaching orbital velocity? [duplicate]

Looking at this Ariane 5 launch, I notice that: the speed continously increase (as I expected) the altitude first increase as I expected, then decrease (I was not expecting that) and then increase ...
12
votes
1answer
1k views

How can the 6.5 m primary mirror of the JWST fit inside the 5.4 m fairing of Ariane 5?

All the variants of the payload fairing for Ariane 5 are 5.4 meters in diameter, the same as the core stage of the rocket. At the same time, the mirror of the James Webb Space Telescope is 6.5 meters. ...
0
votes
1answer
73 views

What is 'green green' weather?

During the today (24/08/16) launch of Ariane 5, Stéphane Israël (chairman & CEO) tells that all conditions are good, including a green green weather. Is it a shortcut for no wind, no rain, or ...
11
votes
2answers
1k views

What is the reason for the Ariane 5 launcher with Intelsat 29e losing altitude?

After reaching a peak altitude of 222 km the Ariane 5 launcher with Intelsat 29e starts to lose altitude. What is the reason for this trajectory? Youtube video Paper on Ariane 5
7
votes
1answer
412 views

Ariane 5 performance data for escape missions

I would like to know the performance for escape mission of the Ariane 5 launcher. More precisely, I would like "LV Performance vs. C 3" curve. My problem is, I can find this info for a lot of ...
5
votes
1answer
560 views

Which launch sites were considered for Ariane 6?

I often see it mentioned that the selection of the launch site for Ariane 6 was one of the preliminary requirements that froze its final design. That does make sense, especially since there was some ...
8
votes
2answers
906 views

Why did the US lose almost all commercial launch opportunities?

With the launch of the SpaceX Falcon 9 V1.1 Nov 25th (Assuming it succeeds), it will apparently be the first US Commercial launch (I assume to GEO, since Orbital, with all the commercial small sats ...
17
votes
1answer
1k views

Ariane 4: shroud around stage?

In this image of the Ariane 4, you can see a blue shroud around the second stage. At least I think it's a shroud. It is present in many photos of Ariane 4 launches, but the drawings I've seen omit ...
13
votes
3answers
1k views

Why are Europe’s Air & Space Academy and DLR urging ESA and CNES to reconsider the use of solid fuels for the proposed Ariane 6?

With Ariane 6 launch site selected, CNES (Centre National d’Etudes Spatiales, the French space agency) was aiming to freeze the design of the new rocket in May 24, 2013. A few days after and that same ...