XP67_Moonbat said:
This talk of keeping Transtage attached to the MOL is interesting. I had read about a self-propelled MOL elsewhere but I didn't really believe it.
It is a logical thing, if you stop a while and think it on....
All the illustration of MOL represented it w/o any stage, but only huge RCS placed in the forward part (closer to Gemini B).
The most famouse image of MOL represent the re-entry module of Gemini B just after jettison, this mean (litterally) that MOL is about to reenter in the atmosphere.
So where is the engine for the de-orbit burn??
It is likely that in the image suche engine was jettisoned earlier, just after the ignition.
But the story not ended here, USAF has always stressed the word "laboratory" meaning that MOL would be such experimental facilities in LEO.
Some MOL missions would be exactly in this way, so if MOL were a "scientific laboratory" there were any needing to change orbit once in LEO (as the ISS does).
On the other side there were some MOL-KH10 Dorian missions that needing a lot of orbital changes (in height and plane) and this imply the necessity to exploit a restartable upper stage.
The three ones available at time were: Agena (too small), Transtage and Centaur (still under development).
Transtage was the "natural" choiche, it was sufficiently reliable and were matching exactly (at least) the diameter of MOL/Titan IIIG.
If we accept the thesis of reflection mirror with side hole, so we are forced to accept either the Transtage in the back of MOL.
I will post ASAP the drawing of this version, stay tuned....