Heul Pfeil / whistling arrow /Peifpfeil
thingiverse
Resolution 0.3 Rafts Brim Have fun trying this out :) https://www.youtube.com/watch?v=5uU1Ct51O1U This one wasn't printed with a 3D printer, but made using this tutorial: https://www.youtube.com/watch?v=vZPomJgv-1g When rounding them out, it's a bit tricky to get the supports out. But it's worth it for my ears - they whistle the best. If they don't whistle, just flip them over or orient them according to the ones stuck up in the photo.
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