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International Space Flight (ESA, Russia, China and others) => ESA Launchers - Ariane, Soyuz at CSG, Vega => Topic started by: beidou on 11/18/2016 03:17 PM

Title: Ariane 5 VA24x - Galileo-FOC FM019, 20, 21&22 - 2018
Post by: beidou on 11/18/2016 03:17 PM
According to the launch kit of VA233, this mission will be in 2018.
Title: Re: Ariane 5 VA25x - Galileo-FOC FM019, 20, 21&22 - 2018
Post by: FutureSpaceTourist on 09/24/2017 02:35 PM
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Looks like our #Galileo launch next year will be the last launch of the  #Ariane5 ES model ever..... #ATV #VA233 #VA240

https://twitter.com/dutchspace/status/911948548161359872 (https://twitter.com/dutchspace/status/911948548161359872)
Title: Re: Ariane 5 VA25x - Galileo-FOC FM019, 20, 21&22 - 2018
Post by: FutureSpaceTourist on 09/24/2017 03:00 PM
Quote
More #Galileo launcher info, heard that the spare Aestus EPS engine (sn55) for next years A5 launch was tested successfully in July @DLR_en

https://twitter.com/dutchspace/status/911965461264453632 (https://twitter.com/dutchspace/status/911965461264453632)

Edit to add:

Quote
Better image of an Aestus EPS engine for a #Ariane5 ES Galileo launch under test @DLR_en P4.2 test site
https://twitter.com/dutchspace/status/911969094391537664
Title: Re: Ariane 5 VA25x - Galileo-FOC FM019, 20, 21&22 - 2018
Post by: woods170 on 09/24/2017 08:03 PM
Quote
Looks like our #Galileo launch next year will be the last launch of the  #Ariane5 ES model ever..... #ATV #VA233 #VA240

https://twitter.com/dutchspace/status/911948548161359872 (https://twitter.com/dutchspace/status/911948548161359872)
Ariane 5 ES was mainly there to launch ATV's. Now that those are no longer flying there is also no longer any need for the EPS upper stage.
Title: Re: Ariane 5 VA25x - Galileo-FOC FM019, 20, 21&22 - 2018
Post by: ZachS09 on 09/24/2017 11:02 PM
Ariane 5 ES was mainly there to launch ATV's. Now that those are no longer flying there is also no longer any need for the EPS upper stage.

Well, what if there was a failure in the ESC-A upper stage? Then they would resort to the EPS upper stage during that investigation.
Title: Re: Ariane 5 VA25x - Galileo-FOC FM019, 20, 21&22 - 2018
Post by: calapine on 09/25/2017 01:09 AM
Well, what if there was a failure in the ESC-A upper stage? Then they would resort to the EPS upper stage during that investigation.

Well after 62 missions of the ESC-A upper stage and 195 flights total of the HM7B engine it's pretty safe to rule out any non-discovered design issues.

And since there is no EPS in storage the lead time to build a new one (if  possible) would be prohibitive as well.
Title: Re: Ariane 5 VA25x - Galileo-FOC FM019, 20, 21&22 - 2018
Post by: zubenelgenubi on 09/25/2017 02:08 AM
Quote
Looks like our #Galileo launch next year will be the last launch of the  #Ariane5 ES model ever..... #ATV #VA233 #VA240

https://twitter.com/dutchspace/status/911948548161359872 (https://twitter.com/dutchspace/status/911948548161359872)
Ariane 5 ES was mainly there to launch ATV's. Now that those are no longer flying there is also no longer any need for the EPS upper stage.

Advance apologies if this is a re-stating of the obvious to the reader...I looked to see if there were any more payloads like Envisat (massive satellites bound for LEO) in the Ariane manifest which might be better served by an EPS upper stage vs. ESC-A...there are no more such payloads.
Title: Re: Ariane 5 VA24x - Galileo-FOC FM019, 20, 21&22 - 2018
Post by: Rik ISS-fan on 11/29/2017 08:51 PM
No there are 0 large LEO/SSO payloads on ESA/European institutions launch manifest that can not be launched by a Soyuz. Ariane 5 ES (galileo) was cheaper when it orbits four Galileo satellites, than two Soyuz launches with two Galileo satellites.
After this (last) Ariane 5 ES 4x Galileo launch. The next launch is 2x A62 with both two galileo satellites.
I predict t this will be the second and fifth Ariane 6 launches.
There are Ariane 5 launcher serial numbers reserved for aditional Ariane 5 ES flights. But those will most likely not be used.

AFAIK there is a agreement between Arianespace (ESA) and IHI (JAXA) that Ariane 5 and H2 serve as backup for each other,  in case of a anomaly. So I don't think A5ES will launch in the unlikely event of a A5 ECA failure.

I've to add this tweet from DutchSpace (https://mobile.twitter.com/DutchSpace/status/935887080223313922):
Apperently ESA has a option for a aditional Soyuz (2 Galileo) launch.
But most likely it will not be taken (only if more clocks fail, and Sats loose functionality, I guess).