Four Cylinder Air Engine, Experimental

myminifactory

A few months ago (February, 2017) I posted normal speed and slow motion videos of a four cylinder air engine on my YouTube channel at https://www.youtube.com/user/popzct0214/videos. Following experimentation with the design, considering its weight and airflow requirements, I placed it on hold and decided against publishing it. Since then, numerous requests for the STL files have prompted me to release them. Keep in mind that this engine is experimental, so be prepared to make precision filings and fine adjustments if you decide to print and experiment with it. This design leverages a spinning rotor to direct air into each of the four cylinders. The rotor features four evenly spaced holes along its length, rotated 90 degrees from one another. "Gear Crankshaft.stl" and "Gear Rotor.stl" are designed to synchronize the rotor and crankshaft, ensuring air is delivered to the cylinders at the right time. The design relies on cylinder blow-by for exhaust, which compromises efficiency but makes an intriguing conversation piece. As usual, I may have missed a file or two, so if you have any questions, please don't hesitate to ask as I'm prone to making mistakes. Designed using Autodesk Fusion 360, sliced with Cura 2.7.0, and printed in PLA on an Ultimaker 2+ Extended and a dual extrusion Ultimaker 3 Extended.