This is a question about the launch processing of the Soyuz rocket (or the Semyorka):
Earlier this month 2 launches of the Soyuz were done from the same pad in the span of less than 10 days (Meteor-M #2 on July 8 and Foton-M #4 on July 18, both from pad 31/6 at Baikonur, with the later being a unique launch that requires the rocket rolling out just 1 day before launch due to last-minute load of biological experiments!), something that even the R-7 hasn't done for quite some time. My questions are:
1. How much maintenance is needed for the Soyuz pads between launches?
2. Can a same pad support a 10-day turnaround between 2 launch operations for more than a few launches if necessary?
3. Are there any configuration changes required at the pads between different R-7 variants flying today (of course the new Soyuz-2.1v would need some changes, but what about between a Soyuz-2 and a Soyuz-U? What about the Molniya-M when it used to fly?)
4. In theory, how many launch operations can the different Soyuz pads (at Baikonur, Plesetsk and at Kourou, as well as at Vostochny in the next year or 2) support today in one calender year?
I must say that I am impressed at the launch pace the R-7 can support even in 2014, especially considering that I heard the launch processing of the Soyuz rocket requires quite a bit of manual operations and unique procedures for rockets worldwide (e.g. using hydrogen peroxide for powering engine turbopumps)! A certain SoCal aerospace company might be able to learn from the engineers of Samara....