The G Prime (along with the G avionics) went on to be the upperstage for the Titan -IV
I understand that the required costs to develop a Centaur G Prime equivalent would be quite high. Why is that?
Quote from: Jim on 05/03/2006 11:50 amThe G Prime (along with the G avionics) went on to be the upperstage for the Titan -IVLet's see now, Centaur G Prime was a 2 engine Centaur with enlarged prop tanks that fit under a 5 meter payload fairing for Titan IV.Titan IV was eventually replaced by the current ULA launchers.There is currently a demand for a larger LH2 upper stage, possibly with larger prop tanks and at least 2 RL-10s. I understand that the required costs to develop a Centaur G Prime equivalent would be quite high. Why is that?
The answer may be in the "Centaur-G Technical Description". Fig 3-6 on page 3-5 is the second fluids config you show, and the last according to my memory of it. I will upload the PDF here, but I see the "Centaur-G' [Prime] Technical Description" has it's own thread which is outdated. Any suggestions?Please give feedback on my first few posts to get me up to responding efficiently on this great forum. This is post #1.Thx all... DanoChief Space Systems EngineerEdit: Just Adding two possibly helpful partial diagrams.
I apologize for the half document scans. The originals are 11 x 22 inches in size, not 8 ½” x 11” as they appear. I cannot scan this size doc, but a lot of what I have is in that old ‘C-size’ format. [Many are Real Blue Prints that start to disintegrate if you look too hard at them, much less try to copy em.]First: These two unreleased ‘CDR handout destined’ drawings both dated 7-27-1983 are of the G’ vehicle, not the Stubby G version. [I don’t believe it but I am actually cutting-pasting-manipulating Shuttle/Centaur docs manually, just like I did 33 years ago… Worm Hole anyone?] Anyway, I reduced and then cut’n pasted the original yellowing 11 x 22 inch drawings into 6 x 8 inch pages which I Uploaded Down below.You will see that the diagram is really labeled accurately. [ya just had to see the whole pic is all]. The Draftsman was told to simply show each avionics box, both on the Centaur and on the CISS, exactly where they physically sat, as viewed from the Port and Starboard sides, as per the customers request. Cut-outs are used to show boxes hidden from view which may be on Centaur or CISS. These working dwgs were published in the “CISS Electrical Systems CDR Meeting Handout” in mid(?) 1983.Secondly: I got a lot of cobwebs shaking loose upstairs, and the solution for this program has always been for us to reference my Centaur/CASE Control Interfaces Block Diagram. It is easy to see all Centaur/Spacecraft Electrical Interfaces on one page for discussion purposes. It needs to be explained a little first, but I will upload any revision/Graphic I can find today. This Systems Block Diagram progressed from Rev-A on Aug- 27-1982, through Rev-G around Jan-1984.
I'm also interested in any schematics that shows the plumbing for the oxygen system on the CISS/Centaur to the same degree as the hydrogen system.
Quote from: DaveS on 11/19/2014 03:33 pmI'm also interested in any schematics that shows the plumbing for the oxygen system on the CISS/Centaur to the same degree as the hydrogen system.Are you talking about fluids schematics or physical structures diagrams?
Quote from: L5 on 11/19/2014 07:47 pmQuote from: DaveS on 11/19/2014 03:33 pmI'm also interested in any schematics that shows the plumbing for the oxygen system on the CISS/Centaur to the same degree as the hydrogen system.Are you talking about fluids schematics or physical structures diagrams? The physical structures diagrams, like the ones posted previously. Any details on the CISS would be great, especially the "break points" where the CISS ends of the plumbing meets the orbiter ends which was part of the "Centaur Mission Kit".Edit:Also was the red ring around the conical transition section between the LH2/LOX tanks flight equipment or was it GSE? Also in this photo where the LH2 F/D/D line is supposed to be there seems to be some kind of boxes. Also flight config or GSE?
Thanks for the reply. I'm one of the developers of a project to faithfully replicate the Space Shuttle, including the pads and the various upper stages for the free Orbiter Spaceflight Simulator. I'm the one who is creating the 3D models of the Centaur upper stages (both the G Prime and the G) as well as the CISS. So this involves getting the models as well as the coding that drives the simulation absolutely correct and accurate.The main thread where we in the project discuss the Centaur G Prime can be found here: http://www.orbiter-forum.com/showthread.php?t=20597Be sure to check out the entire thread as it contains all of our discussions.I have attached a schematic from an unrelated document that illustrates the Centaur Mod/Mission Kits.
Do you have any titles or NASA reference date to start the search with? Most of our Centaur data comes from the Centaur G Prime Technical Description and some documents from the NASA Technical Report Server (NTRS).Also, any other photos showing the Centaur with the TPS applied would be great. The only S/C photos I have is of the one on exhibit at the US S&RC, but it along with the CISS it is mated to, has had alot of hardware including the TPS removed.And do feel free to join and post anything in our Centaur thread.