One more probe to add. ESA's Smart 1.
Hello,In my research I'm trying to optimize the path of my theoretical Centaur-based craft. This has led me to wonder how pitch programs are optimized for real rockets. Do the engineers just try a whole bunch of pitch kick time and delta-angle values and see which are the best? Would this need to be repeated if a mission required a new set of orbital parameters? Or is there a more analytic way to find a good pitch program?
Hi there,How thin does aluminum have to be for H2 boiloff to occur? How thick does it have to be to prevent N2 or O2 boiloff?
No, actually I wanted boiloff of hydrogen in this case. I just figured there would be lots of people on this forum who knew about this.So it takes feet of aluminum, you say, to prevent N2 and O2 boiloff?
Quote from: scienceguy on 02/06/2011 10:43 pmNo, actually I wanted boiloff of hydrogen in this case. I just figured there would be lots of people on this forum who knew about this.So it takes feet of aluminum, you say, to prevent N2 and O2 boiloff? Not sure why you think thick aluminum would help. Aluminum is a pretty lousy insulator. That's why they make radiators out of it. Thicker would just give you more mass to warm the H2 and make boiloff worse to start.