Guys,
I like to design and scratch build 3D profiles. I thought it might be fun to discuss what works best in our designs or in airplanes we purchase. I know there are many gifted designers/builders/flyers on here who can really teach us a lot, so I thought I would just get it started.

I've made a ton of profiles along the lines of what I call "my" basic design. Nothing new, just what works for me. I've been consistent, trying to change one perameter at a time so I can learn the pros and cons of each change. For example, I have found better harrier performance with low aspect ratio wings. These are just general comments, nothing too specific. I just wanted to mention a change in this direction has improved the harrier performance of my profiles. Assuming, of course, everything else remains constant, such as type of wing (hershey bar, double taper etc.) and everything else. I also like a long tail moment. It seems to smooth everything out and make precision more obtainable. The last general thing I've found (besides airfoil) is design of the tail. I like to make mine similar to a Cap 232. Stab high and forward, rudder behind the elevators.

Once again, I know these are very general comments and, of course, when designing one I get really specific and use the calculator a lot. But I just thought this kind of discussion might shed some light on what makes a good flying 3D profile.

So what works for you?

Thanks,

Dave