Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5869640.

This is a flying ring. You can see it thrown here. https://youtu.be/PEX3bv1aqJE

It has a scaled ag37-il airfoil at its leading edge and you throw it like a football. Feel free to play with scaling and trimming to see if you can improve the performance. This is loosely based off of the NASA design for a paper glider.