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File: airfoil.jpg (163.27 KB, 1196x543)
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Trying to make a glider in Inventor. I've been using a control vertex spline for the airfoil. Would that work okay? It's just a simple glider for a high school project. What do you suggest for an airfoil in Inventor?
File: bb.jpg (37.95 KB, 1024x768)
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Engineer here. find an airfoil on
and download the co-ordinates for the one you choose.I recommend the NACA airfoils. It will come out as an excel spreadsheet so you have to input it manually. Airfoils are actually quite complex, it's best to copy an existing design. If you try making one yourself and fuck it up you will get terrible turbulence. You've already fucked up that one, there is no camber (assuming you're going to mirror that drawing for the bottom) therefore you will need to throw it really fast for it to fly
NACA airfoils use two parabolas that are pieced together at the point of maximum camber for their mean camber line. A spline with a controlled vertex is a segment of a parabola that is not necessarily aligned with the x or y axis. It can be rotated. That generates a more smooth and continuously changing curve while not having the point of maximum camber occur at the midpoint between the leading and trailing edge. I'm not trying to say "oh you're wrong I'm so much smarter and better than you," I'm just explaining my reasoning behind this so you can tell me if it is at all valid. I have no idea if any of that actually has any positive effect on flight. It's just an idea with very little testing on my part, and with no further research to back it up.
Also, to clarify, I'm not mirroring that for the bottom. We're only putting skin on the top, so it can be lighter. I'm adding thickness to the rib, but not to the airfoil. What you see in that drawing is just the shape I was hoping the skin would achieve.

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