Good way to attach an airfoil in a wind tunnel?
Hello everyone!
I'm currently a Junior engineer, but we have a group that is wanting to build our own wind tunnel setup. See, thus far, we've agreed on an underfloor dual-strut setup (only concerned with pitch) and we have the mechanisms all designed below, but we're having trouble figuring out a good way to attach this linkage to the airfoil itself.
We have the main strut in front 25% behind the leading edge and then a pitch strut (only moves linearly) about 1.75" or so behind it. Due to the rather small scale of our rest chamber (7x7"), we can really only max out at a chord length if like 3.5". It's just trying to find a good way to mount the air foil without disrupting the aerodynamics and it's just something I have no experience with and can't find much documentation online. Feel free to ask more questions and I'll try to fill in more! Probably deciding on some 3/8" or smaller steel rods as the struts themselves, but I do have some 3d printing to make custom parts (as I am with the airfoils).