Rand Simberg wrote:

Or subcool the propellants and insulate the tanks properly...


Still, how long would one have to get it all stuck together? Days or weeks?
The Soviet's did a stage (Block D) that used an insulation sunshade for
it LOX/Kerosene propellant on Proton-Zond and N-1:
http://www.myspacemuseum.com/l1s_2.jpg
But do we have any experience with this sort of thing? The closest we
came was the canceled Shuttle boosted Centaur stage.

Pat