Okay, I've seen several interesting techniques to ascending optimally, but they all seem rather primitive. These techniques are mostly something like staying at 200 m/s until you reach a certain altitude and then max the thrust, or just going full speed all the way. So I set out to find a mathematical expression for this. I'm pretty good with algebra and calculus, but still, I haven't managed to come up with such a function myself. Taking drag, weight, thrust and air pressure into consideration, would it be possible to find the optimal travelling speed? If so, how? I saw someone had once put up a table with optimal speeds in intervals, but he didn't explain how he figured it out and I cannot seem to find this by searching on the forums nor on the wiki page.