Молоток, расширяющий снаряд для картофелемялки

If you need help for scaling the model, i can help with that. Just tell me the desired dimensions.

Model is made for pn16 50mm pvc pipe (id 42,6mm/1,677" )
But you can scale this to any dimensions you like.
Scaling too much downwards might make the tolerances so small that centerpiece is printed solid, so watch carefully during slicing.

Expanding slug style projectile for potato cannon. This projectile needs power to work properly.

There is round nose version and sharp nose version. Round expands faster during impact, sharp penetrates slightly deeper before expanding. Added v2 versions from both. These are same design, but tail is bit longer, so projectile is more nose heavy. Use v2 if you have tumbling problems. My gun shoots v1 straight without tumbling, but made these just in case.

When projectile impacts something, after penetrating small amount, small holding tabs of the nose cone will break and it will start to push inside the projectile. Same time it starts to push those six tooths outward with its conical body, and projectile starts to expand rapidly. Eventually it opens bit like a flower. Tooths will broke completely off after penetrating deep enough. This makes big devastation to softer targets.

There is small shaft in center of the bottom part that keeps the nose cone centered when it is going inside after hit. Tiny tabs in the top of the center shaft and each tooth holds the nose cone in place before impact. There is couple cutaway images where you see inside the projectile.

For obvious reasons, this projectile is for one time use only.

No need for supports, one part print. The centerpiece comes in same print.

No need for supports, one part print. The centerpiece comes in same print. Harder filaments work better than more elastic, because tabs need to broke when this hits on target. Pla works good.