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Well, I think the LAS, an empty Orion and an empty service module together weigh ~21 mT. According to Rocketbuilder.com, the heaviest Atlas can send 18856 to LEO, but that isn't including the 5 meter fairing which the LAS replaces. I think it would just be a matter of stripping some parts out of the service module to get enough fuel load to do an ISS mission.  Strip out 2 out of 4 propellant tanks, some of the O2 and N2 tanks, 3 out of 6 of the H20 tanks and use 2 panel solar panels vs 3 panel. Rocketbuilder website doesn't include a dual-centaur upper stage, so that might boost things even farther.

If we are considering a Delta-IV Heavy, why not just use a SLS without an upper stage? 4 SSMEs cost ~$50 million each and the SRBs are what? $50 million each? That is $300 million in rocket hardware not counting the rest of the core stage. It would be in the same ballpark as what NASA pays for a Delta-IV heavy.
 
Another option would be Orbital's NGL if that gets off the ground. Think it will use the VAB so resources for Orion would be close by.

Why not just use a block-V F9?  The Block-V F9 flying expendable should be able to do 22,800kg to LEO.  The Block-V version will be the one that will be human rated for crew.   
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I'm told that a rocket is in final process of stacking on the pad. type is unknown until later stages arrive.
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1 trillion rubles is expected to be reduced to 340 billion rubles
17.7 billion US dollars is expected to be reduced to 6 billion US dollars.
Very expensive these Angara facilities are.
That was the whole cosmodrome cost.

During a visit to Vostochnyy yesterday deputy Defense Minister Timor Ivanov said the construction of the Angara pad at the cosmodrome is expected to cost 58 billion rubles, which is about $1 billion. http://tass.ru/kosmos/4289592

it should be significantly less that the dolgostroi/nightmare project at 35/1.
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1 trillion rubles is expected to be reduced to 340 billion rubles
17.7 billion US dollars is expected to be reduced to 6 billion US dollars.
Very expensive these Angara facilities are.
That was the whole cosmodrome cost.

During a visit to Vostochnyy yesterday deputy Defense Minister Timor Ivanov said the construction of the Angara pad at the cosmodrome is expected to cost 58 billion rubles, which is about $1 billion. http://tass.ru/kosmos/4289592
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Space Science Coverage / Re: NASA - Cassini updates
« Last post by eeergo on Today at 09:58 PM »
Also, another milestone showing us the Solstice Mission is really over and the Grande Finale is upon us is that... well, solstice has passed for Saturn :)


https://saturn.jpl.nasa.gov/news/3065/cassini-looks-on-as-solstice-arrives-at-saturn/


The sixth inter-ring passage has occurred, 16 more to go!
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Historical Spaceflight / Re: On-Pad Explosions
« Last post by WallE on Today at 09:56 PM »
Watching these early attempts to land an Atlas booster helps me appreciate the progress we've made...

To be fair, the reliability of the Atlas was pretty good by 1965. AC-5 was the first time a space launcher Atlas had malfunctioned in almost two years. It was also the first time an Atlas had ever experienced a prevalve malfunction even though this failure mode had always been possible. They solved the problem by installing a locking mechanism in the prevalves which would be enabled prior to launch, thus ensuring they would stay open.

The next Atlas to fail after AC-5 was 68D, which launched OV 1-3 on May 28 and self-destructed two minutes into the launch after losing a booster engine. I don't happen to know the exact reason for it, but Atlas 115F (ABRES test) in 1966 destroyed itself due to a prevalve failure that terminated B-1 engine thrust so that's the most likely explanation.
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Psyche will be carry laser communications, RF is still primary comms while laser is a test. If it works the orbiter will be able to send huge amounts of data.
Send it to what? Laser without an orbital relay has always had cloud cover making scheduling iffy.
TDRS-4G constellation is in development to fix that.
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