Proton-Soyuz Joint Launch (an old dream made true !)
I used the Thorton's ProtonLV & ISSR + ProjectR7, and added an handy docking port to the block DM2 using the .cfg file.
I first launched a Proton-M with no payload (well, the payload was the Block DM-2). I managed to put in on a 180x410 km orbit without using the DM2 engine.
About one day later I launched a R7/Soyuz-TMA to a 190 x 210 orbit (using LaunchMFD). The rendez-vous manoeuvers took about 36 hours (something like 25 orbits).
That was a difficult docking, the module was spinning, and I didn't want to waste it's precious RCS fuel (that you need for the ullage burns). The encounter took place on the night side, so the headlight greatly helped me. :thumbup: Once docked, I was able to counter the spin motion with the SoyuzTMA RCS, without burning too much fuel.
Now that I'm there, I'm going to make some thrust experiments on LEO. The ultimate goal is the Moon, but I need to test the assembly before.