Looking for a graph

All,

I'm looking for a detailed and precise graph giving the speed
of the shuttle at every moment, from lift-off until it
reaches orbit. Not easy for me to find it on the web...

Thanks,
UJ

Uncle Jean wrote:
All,

I'm looking for a detailed and precise graph giving the speed
of the shuttle at every moment, from lift-off until it
reaches orbit. Not easy for me to find it on the web...

I believe that's partially because the speed is trajectory dependent,
but in certain cases because NASA has something to hide.

Challenger's Ghost

" told the uncle and all the others:

» I believe that's partially because the speed is trajectory dependent,

But there must be no big difference, I think, in speed and
altitude at MECO, whatever the orbit they want to reach.
Right ?

» but in certain cases because NASA has something to hide.

This is something I don't know so I can't comment.

» Challenger's Ghost

UJ

"Uncle Jean" told the uncle and all the others:


» But there must be no big difference, I think, in speed and
» altitude at MECO, whatever the orbit they want to reach.
» Right ?

OK, so a graph indicating the speend at every moment from
lift-off to MECO... )

UJ

Uncle Jean wrote:
" told the uncle and all the others:

=BB I believe that's partially because the speed is trajectory dependent,

But there must be no big difference, I think, in speed and
altitude at MECO, whatever the orbit they want to reach.
Right ?

Are you talking about those two as "predicted" values? If so, can you
specify a standard payload and nominal SRB thrust?

With regard to your initial query about speed all the up, I took it
that you were looking for just one "as flown" graph. For that, I think
you might need a non-existent envelope of all missions.

=BB but in certain cases because NASA has something to hide.

This is something I don't know so I can't comment.

Well, for one thing, some of the older missions were classified (e.g.,
as to payload, payload weight, type of orbital insertion, etc.).

Challenger's Ghost

" told the uncle and all the others:

» Are you talking about those two as "predicted" values? If so, can you
» specify a standard payload and nominal SRB thrust?

If I had a graph that describes only one particular flight,
it would be good for me.

(...)

» Well, for one thing, some of the older missions were classified (e.g.,
» as to payload, payload weight, type of orbital insertion, etc.).

I see.

» Challenger's Ghost

Uncle Jean wrote:
" told the uncle and all the others:

=BB Are you talking about those two as "predicted" values? If so, can you
=BB specify a standard payload and nominal SRB thrust?

If I had a graph that describes only one particular flight,
it would be good for me.

To tell you the truth, Uncle Jean, many years back I encountered the
same problem you're having now. FOIA requests went unanswered by NASA
back then, sometimes perhaps even when they were made as part of an
official investigation. (By the way, I know of at least one
altitude/velocity FOIA request which is pending as we write.)

I decided to improvise (radically) by interpolating. I constructed some
rudimentary graphs of my own. For whatever they're worth, I used the
NASA PAO predictions, as they were called-out on early missions. I had
most of those on videotape. (I still do, but they are all
pre-Challenger, of course).

I haven't kept up with post-Challenger missions much, except enough to
tell you that some things have changed. I'm sorry I couldn't be of
more help to you.

Challenger's Ghost

" told the uncle and all the others:

» (...)
» I haven't kept up with post-Challenger missions much, except enough to
» tell you that some things have changed. I'm sorry I couldn't be of
» more help to you.
»
» Challenger's Ghost

Anymay I thank you, CG.

UJ

If I had a graph that describes only one particular flight,
it would be good for me.

In that case, Spaceflight Now has not a graph, but a chart, listing the
velocities of STS-114 starting at launch. With that data, you could make a
graph easily. Check out:

http://spaceflightnow.com/shuttle/st...rajectory.html

"Vincent D. DeSimone" told the uncle and all the others:

» In that case, Spaceflight Now has not a graph, but a chart, listing the
» velocities of STS-114 starting at launch. With that data, you could make a
» graph easily. Check out:
»
» http://spaceflightnow.com/shuttle/st...rajectory.html

Very good chart and I thank you, Vincent.

UJ