Look for boiloff formulas in the source code of NTR core stage. /me ended up using INSANE number of MLI layers, and did not account for heat leaks through stitches and holes. The formulas can be adapted to LOX (I hope)
...Also, during the LCROSS mission, the Centaur stage performed a serie of burns over an extended period of time, if I remember well ?...
Will the launcher have its own pad and System Sol, since it is a tad too big for use on the default LC-39.
Molson Industries, Inc., just released a preliminary design of the future "Sigma-IV" SHLV (Super-Heavy Launch Vehicle). According to this document, the massive rocket would be able to launch up to 220 metric tons of payload in orbit. Applications could strech from 1-piece orbital station deployement to planetary exploration, though nothing has been confirmed yet.
It has also been announced that the "Sigma-I" and "Sigma-V" programs will go through a major redesign.
AstroNews, Tuesday the 7th of May 2013.