The study did not address the other US Evolved Expendable Launch Vehicle (EELV) - a heavy-lift version of the Atlas V - because of "no clear advantages and several disadvantages," including the difficulty in obtaining human-rating data on its Russian RD-180 engines.
wrote Frank Morring with his 15 June scoop. Of that sentence there are 12 words that represent the biggest obstacle to using the Atlas V and I can't remember it ever being discussed by the blogosphere, the difficulty in obtaining human rating data on its Russian RD-180 engines
The Russians will have their own technology export rules and it is not beyond plausiblity that the information that is needed to human rate the Energomash RD-180 is restricted by them
Oh but the Russians might use the RD-180 for the new launcher for the Advanced Crew Vehicle, I hear the blogosphere cry. Fine, and they have access to the data to human rate that engine but Pratt & Whitney Rocketdyne won't be getting it anytime soon
Or to flip this argument on its head, if you think members of Congress don't like paying Russia for crew transport to the International Space Station now how do you think they will like having the the US ISS ferry and subsequent return to the Moon programme's crew transportation system dependent entirely on Russian engines?
he sad reality is that this whole RD-180 situation has been dragging on for years...



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