Question Mark Hook Boomerang
thingiverse
This is a pretty extreme hook shape. These have a tendency to dive, which I tried to counteract by adding airfoils and thus lift to the elbow area. I would not recomnend this for inexperienced throwers, since it is a bit finicky regarding tuning. Add a bit of dihedral if it flies too low. Thrown not too high with a bit of layover, it should do a nice big circle.
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