Here is a model of a jet turbine! Designed to print using PLA and a MakerBot Replicator 2 (unheated bed). The working model is operated via an air compressor. A nozzle is stuck into the hole seen on the right, the hole is about 0.3" x 0.3", I did not design the hole with any sort of air compressor or pipe size in mind. Built with 1% expaion gap on all parts, enjoy.