I did some drop tests during the weekend and have crunched some
numbers. There's now a model for estimating the drag of lower stages
in section 3.5 of the technical documentation:
If someone wants to try to fine-tune the method feel free to do so,
the data is presented there. I did try various methods, and think
that's a fair compromise. The accuracy is around 15%, which I call
reasonable for such a dynamic system.
Sampo Niskanen <=> http://www.iki.fi/sampo.niskanen/