Vega - Europe's Newest Rocket

Grey Havoc

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Re: Europe's Newest Rocket

Hobbes said:
Interesting choice to have solid propellants for the first three stages.
It was supposed to provide cost savings in both manufacture and operation.

Another reason given has been:

The rocket is centred on an Italian design that has raised eyebrows for its complexity.

Rocket makers usually try to reduce the number of stages as far as possible to avoid the risk of failure if a stage does not separate or if a motor refuses to ignite.

But Vega uses four stages to propel a small payload into low orbit. The reason: the rocket uses solid fuel, an energy source that cannot be turned on and off as easily as liquid propellant, so having additional stages offers flexibility in swiftly boosting or slowing a flight.

Another innovation, said Carine Leveau of France's National Centre for Space Studies (CNES), is a first stage whose body is made of light-but-tough carbon fibre, a precious gain in the quest for low-cost reliability.

Spacedaily.com
 

Michel Van

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Re: Europe's Newest Rocket

the launch was very abnormally for European prototype rocket, a full success ! ;D

http://www.youtube.com/watch?v=F0IZ6d4wTCg
 

blackstar

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Re: Europe's Newest Rocket

Michel Van said:
the launch was very abnormally for European prototype rocket, a full success !
That's great to hear.

A few years ago I did a quick survey of new launch vehicles. Turns out that the failure rate for brand new vehicles is something like 50% for the first launch, 25% for the second launch. There is some difficulty in deciding what is a "new" vehicle, but the numbers are fairly consistent for general conclusions.
 

Hobbes

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Re: Europe's Newest Rocket

Pity the launch site was covered by clouds, very little to see after the first 30s.

The commentary in the video refers to other videos which sound interesting but which I can't find offhand. Anyone know where these might be found?
 

Michel Van

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Re: Europe's Newest Rocket

Some Foto at flickr
http://www.flickr.com/photos/europeanspaceagency/sets/72157629144644601/show/
 

mz

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Re: Europe's Newest Rocket

I think they want to take advantage of the Ariane solids infrastructure.

Maybe after a few Vega flights the Ariane 5 can go to upgraded carbon fibre solids too,
shedding a lot of weight. Maybe the main stage or some upper stages could be stretched at the same time?

Vega has taken very long to mature.

IIRC they're going to use for the GPS me-too Galileo satnav system.
 

blackstar

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Re: Europe's Newest Rocket

Matej said:
That was the fastest start that I ever saw for a civil space rocket.
Take a look at Taurus launch footage. It's a converted Peacekeeper ICBM, so it's designed to move fast.
 

CNH

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Re: Europe's Newest Rocket

That was the fastest start that I ever saw for a civil space rocket.
Advantage of a solid fuel motor.
 

Grey Havoc

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Re: Europe's Newest Rocket

Grey Havoc said:
A new Ariane 6 concept has been proposed, and ministers must sanction the way ahead and fund it.

They are being asked to commit 3.8 billion euros (£3bn; $4.7bn), which will cover not only the A6’s development but also an upgrade to Esa’s small Italian-built Vega rocket.
 

Michel Van

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Re: Europe's Newest Rocket

not only upgrade for Vega


the Ariane 6 will use new Solid booster, build with same technology like Vega rocket first stage
 

Grey Havoc

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Re: Europe's Newest Rocket

http://spacenews.com/vega-to-launch-skybox-satellites/
 

ouroboros

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Re: Europe's Newest Rocket

Fallout from no more rides on Dnepr? Though considering the love between Google(Skybox) and SpaceX, this may have been a temporary payload shift for Dnepr orphaned payloads and not a long term launch strategy as a customer. Though a ride on a solid is in theory rougher than a liquid, all things considered, so how much rework is going to be needed for Vega?
 

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https://spacenews.com/arianespace-vega-launches-italian-imaging-satellite/
 

Flyaway

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July 11, 2019

Flight VV15: Mission failure

Approximately two minutes after the Vega launcher’s liftoff from the Spaceport in French Guiana, a launcher anomaly occurred shortly after ignition of the Zefiro 23 second stage – leading to the premature end of the mission.

Data analyses are in progress to clarify the reasons for this failure.

An independent inquiry commission will be set up in the coming hours.
 

Michel Van

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what Scott Manley Video show on Vega launch
Seems that Second stage not ignited
 

archipeppe

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Indeed a very strange and unusual failure for a solid rocket booster.
As Italian I mourn the loss....
 
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