Jerry,

Wow, thanks, I didn't know about these software packages! I typically use RockSim, Open Rocket and VCP. I also have some old CFD programs from Aerorocket that I occasionally use when I want to look at rocket's coefficient of drag. Can these software packages handle odd-ball designs like tube fins, ring fins, square body tubes and unsymmetrical fin designs?

__________________
Bruce S. Levison, NAR #69055