Jeff Findley writes:

Boeing proposes X-37B for ISS cargo/crew operations
http://www.nasaspaceflight.com/2013/...abilities-iss-
missions/

The article isn't clear why NASA appears to have dismissed this Boeing
proposal, which was made shortly after the first successful test flight
of X-37B. Of course, you have to be a paying customer to see the
original Boeing presentation on "L2".

I think one major reason for writing this off would be that you need an
Atlas V to launch it in the first place. This is not cheap. At all.

The ability to get back the payload container (for a very small payload
compared to what you have to launch) is rather meaningless then.


Jochem

--
"A designer knows he has arrived at perfection not when there is no
longer anything to add, but when there is no longer anything to take away."
- Antoine de Saint-Exupery