Impeller water jet propulsion system

A simple water propulsion system for RC boats/robots.

i don't really know what this kind of thing is actually called, but i thought "impeller jet" sounded fitting.

I designed it to work with the Hextronik "Blue Wonder" motor: http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=2069&aff=1517277
but it'll most likely work with any 3mm shaft motor.

test video hopefully coming soon