Turbo Sprinkler

It's a turbo lawn sprinkler.

Inspired by the exhaust impeller housings of turbochargers, the reducing spiral around the outside, with a narrow slot around the inside and narrow dome space leading to the outlet, the idea is to accelerate lower pressure irrigation water to spread it over a large area.

It will be a challenge to print, perhaps impossible for an FDM but should be easy for any powder sintering or optical resin printer.

Now including sliced like a bagel for easier printing, but you'll have to glue it together.