LEGO Technic Propeller
thingiverse
A basic LEGO propeller that should easily fit onto a standard Technic axle. Occasionally, it demands some minor filing of the central hole to allow the axle to slide in smoothly, although this largely depends on the chosen print settings. Exactly one LEGO stud wide and engineered to be printed without any complex overhang supports. Brims are perfectly acceptable.
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