A coke and mentos driven engine.Inspired by their recent rocket car, but exploring alternative designs to increase efficiency and reduce wastage of my fav soft drink*See the rocket car here: http://www.eepybird.com/featured-video/the-coke-zero-mentos-rocket-car-2d/The EepyEngine is driven by the usual 0.5 inch PVC/Coke/Mentos setup, and hopes to be a lot more efficient than driving acrylic rods. You can also mount many of them together through a long M6 threaded rod to increase torque.*technically, i love the non-diet, original recipe Coke; not the recommended diet variety.Please post results of any tests done on torque or angular velocity!Update Impeller.stl file just updated. It was flipped around axis! Argh.... Sorry anyone who printed earlier impeller...