Windmill Shuriken(Fūma Shuriken) Boomerang

As the name states, it is a boomerang shaped like windmill shuriken from the Naruto series. The model is a technically a reversed shuriken, as the “sharp edge” (i.e. silver edge) will not hit the target when it spins. I've tried to model the aerofoil so the leading edge is the sharp edge, but it could never generate enough thrust to loop back, hence this reversed design. Just in case if anyone is curious, the silver edge was done with aluminium tape

To grip the boomerang, hold it such that the bottom silver edge is facing outwards from your thumb. Shown below is the right handed variant.

So far, the best results i have had so far is using PLA with 0.15mm layer height with a 15% Line infill pattern, Concentric infill for the top, and Octagram Spiral for the bottom. Your results may vary though. In all cases though, I recommend using a infill the ensures the weight is evenly distributed.

This was printed on a Prusa Mini, hence the relatively small size. As such, the radius of travel is not very large, probably around a basketball court at most. Therotically if you scale up the model it could travel further, but I can't be certain. 

While trying to design this, I found a seller making real wooden boomerangs if anyone is interested. If you are looking for a proper shuriken boomerang that can really travel far, maybe take a look there.

Full disclosure, while I have managed to get it to come back twice, I have not gotten it to come back consistenly as this is my first time throwing boomerangs. I can't judge if its my throwing technique or the boomerang that sucks. If anybody has any tips, please do to share them.