It Works! Muahahahaha~ I have to do a project for my controls lab course. I decided to do the stabilization of an airplane in pitch. I wanted to make something that would actually attach to one of my RC airplanes, but the problem is that I’m not an EE and I don’t know/have the time to build and test an entire circuit board. So I went another route. I decided to build myself a wind tunnel using a house fan, $90 worth of Plexiglas I cut with a ban saw, particle board for a base, and metal L brackets for the side supports. It’s all screwed together with 1/4-20 bolts\nuts\washers. I got the airfoil for free from a friend who did his masters in Aerospace in manufacturing of small airfoils from composite materials. It’s a small blue Styrofoam wing with a nice hole cut through the CG so I could put a rod through it for support. Its also covered in fiberglass and epoxy resin. I could have made one myself, but this was a HUGE time saver having one done for me. I made flow straighteners inside the wind tunnel using more Plexiglas pieces and taping them with 2" clear tape. Power comes from a normal house fan. For now, I was controlling it with my RC Futaba Controller. For the project I have a servo interface that will run on MATLAB through a PID loop. *Hopefully* you will be able to tell it an angle, and it will move the servo and maintain that angle. Right now the dowel is just held in place by sliding through the side holes in the Plexiglas, but I’m going to replace it with roller bearings once they come in next week. It has too much friction the way it is right now. A potentiometer is going to be attached to the shaft to sense the angular rotations. The voltage will be converted to a wing angle. I bought everything to make the wind tunnel at home depot and came up with how I was going to make it on the fly as I bought parts. I built this in one day, and it works! :surprised This is way cool. I’m a geek. http://youtube.com/watch?v=tPqrOspSz6g http://img145.imageshack.us/img145/7804/pict0070kx4.jpg [Broken] http://img144.imageshack.us/img144/9958/pict0071gm3.jpg [Broken] ^ Note wind tunnel propped up on airfoil theory book. It was useful for something.