Commercial and US Government Launch Vehicles > ULA - Delta, Atlas, Vulcan

ULA Innovation: Integrated Vehicle Fluids (IVF)

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brickmack:

--- Quote from: Chasm on 08/09/2018 06:51 pm ---As long as we talk about the same engine choice a (mostly) common engine section / thrust structure would make sense. There are only so many ways to plumb it after all. Since thrust stays the same "just" add a 8.4m adapter ring...

--- End quote ---

This was basically what JAXA/MHI proposed. MB-60 engines, common structure and LOX tank between EUS and the H-III upper stage. Then NASA and JAXA would individually handle the hydrogen tanks

Chasm:
The who gets to be contractor game certainly got messed up by the ULA merger.
With all the STS heritage hubbub Centaur-G Prime should have been the some leverage.
ICPS right now and just modify the tower later was also a great idea.


I think the best part about the IVF flight test contract is the additional leverage.
Should be easier to make one NASA department accept the slightly increased risk if another NASA department pays you to fly the test. Similar argument but more complex for other missions paid with tax money.
So far the argument always was that flying anything new is risk and that customers just won't accept any additional risk no matter now minuscule.

Jim:

--- Quote from: Chasm on 08/10/2018 02:11 pm ---The who gets to be contractor game certainly got messed up by the ULA merger.
With all the STS heritage hubbub Centaur-G Prime should have been the some leverage.
.

--- End quote ---

Huh?  How would Centaur-G Prime have helped?  And it did fly as the Titan IV Centaur.

Chasm:
How?
SLS needs an upper stage, so how about a heritage piece like the SSME or solids. Just from a better day, where STS was not plagued with deadly accidents... (Plz ignore the unsafe gorilla behind the curtain.)

Not really important.
I can't be bothered to look up who actually did the contracting in the past (IIRC LM) and who will do for EUS (IIRC Boeing at NASA Michoud). Tax money gets spent where politicians say to. If and when SLS becomes too much of a hot potato they'll find new and less controversial ways to achieve their goal.


The important bit is that IVF is going ahead (finally) and that if it is anywhere near as good as expected it will advance the state of the art in upper stage a lot. No matter if Vulcan turns out to be viable or not.

Jim:

--- Quote from: Chasm on 08/10/2018 09:31 pm ---How?
SLS needs an upper stage, so how about a heritage piece like the SSME or solids.


--- End quote ---

It was nothing of the sort. Heritage is not applicable since it never flew.  It never was heritage man rated hardware.  Besides the existing Centaur is just as large and ICPS is larger and safer

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