Reuleaux Triangle with Grip (+Bonus Wheel Attempt)

thingiverse

The Reuleaux Triangle is an object of constant width.The grip on this one helps to demonstrate this with smoother surfaces at the cost of adding a little turbulence.The wheel bonus has a print-in-place pivot that should be counter-rotated twice for every full rotation of the triangle, to maintain the height of an axle going through it..Which doesn't work very well due to forces just being hard to operate here - and would technically be speeding up and slowing down.And to drive the wheel would require two locked sets and a planetary gearbox designed into it.. and I only have so much time for reinventing the wheel! :)