Re: Man-Rating Atlas V


lou@xxxxxxxxxxx wrote:
Will McLean wrote:

Nor are the changes for the CEV version *that* minor. Besides the
changes you mention, NASA believes it needs a higher thrust upper
stage, probably with more RL-10 engines. And the three core
configuration, which Atlas has never built.

No, the Atlas that is proposed to be man-rated is the 401 varient, with
just one core engine, a single centaur, and no solids. See
http://www.lockheedmartin.com/data/assets/13344.pdf
where this is very explicit.

Which is probably adequate for a LEO ferry, but not for the CEV, which
has an explicit requirement of being roomy enough for the longer lunar
mission and having enough delta-v to come back from lunar orbit.

Will McLean

.

Relevant Pages

  • Re: Man-Rating Atlas V
    ... Nor are the changes for the CEV version *that* minor. ... has an explicit requirement of being roomy enough for the longer lunar ... mission and having enough delta-v to come back from lunar orbit. ...
    (sci.space.policy)
  • Re: Space Access Update #112 9/19/05
    ... Pat Flannery wrote: ... > we've got stage one for the CEV carrier around 90% ready, ... Looking at resizing the CEV so it could fit on a Delta or Atlas ... very smart option. ...
    (sci.space.policy)
  • Re: Booster for CEV?
    ... > What boosters are under consideration for the CEV? ... Titan or Atlas ... > cycle to get CEV flying because Shuttle will be retired by 2010 ...
    (sci.space.history)
  • Re: Booster for CEV?
    ... > What boosters are under consideration for the CEV? ... either EELV (Atlas V or Delta IV) could ... cycle to get CEV flying because Shuttle will be retired by 2010 ... Titan has been retired and isn't powerful enough, ...
    (sci.space.history)
  • Re: Delta Heavy too small for NRO sat
    ... the rationale for spending billions on developing the "Ares" launchers. ... Atlas isn't "man-rated", therefore it can't carry ... carry the fully-fuelled propulsion module that will carry the CEV ... How wonderfully tautological of NASA to do it that way. ...
    (sci.space.policy)