I had a problem with Profili.  Big download and kept getting a violation when trying to run.  I also got a security warning saying it was a "seldom downloaded" - i.e. little know program.

I did get a demo copy of Compufoil.  It's much more than I can truly understand but I guess there's a lot of variables when you designing software for many different apps.

I've got Compufoil for 15 days.  I should be able to figure it out by then.  I'm definetly learning some stuff.

The reason I'm doing this is that I built a fragile scale plane and converted it from wind-up to electric / rc.  Problem is, it kept wingtip-stalling and I got tired of repairing it.  It had a gull-wing with a decreasing camber on the ends.  

 I'm trying to build something very tough and very easy to repair.  No gear.  No frills.  Just a real tough plane.  Then I can experiment on the affects of wing design with small rc planes.