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Space Forum / Shuttle / August 2005Looking 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 > 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 "ghost@gmail.com" 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... :o) UJ > "ghost@gmail.com" told the uncle and all the others: > [quoted text clipped - 3 lines] > 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. > » 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 "ghost@gmail.com" 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 > "ghost@gmail.com" told the uncle and all the others: > [quoted text clipped - 3 lines] > 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 "ghost@gmail.com" 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/sts114/fdf/114trajectory.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/sts114/fdf/114trajectory.html Very good chart and I thank you, Vincent. UJ |
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