SpaceX knows where to look for information. No need to help them in this area.I know it needs to be cheap. Money was no object for defense programs, so leveraging work already paid for in some defense program would seem wise.
If not SLBMs, maybe cryogenic in-flight refueling proposals that got so only got far.
I want Starship to succeed.
What might you suggest he look into?
There is nothing in defense program to leverage from. No defense program has done anything remotely like this.
They have ability to get data from all the "cryogenic in-flight refueling proposals" from NASA and would be ludicrous to think otherwise that they haven't. Also, by flying dozens if not 100's of cameras in propellants tanks, SpaceX has more data on fluids in zero gravity than existed before.