2 Cyl Pneumatic engine 2019 - 2021
My 3d printed pneumatic engine project has to be one of my personal favorites. This idea piggy backed off of a project I made my senior year in high school, which in short, was trying to convert pressured air to rotational energy which in turn could be converted into electricity with a motor and a stator. Sometime after high school I started looking into basic pneumaitic concepts and what was already created for 3d printed engines and decided I would try to make my own...
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The model to the left is the second prototype of my pneumatic engine project. Some notable changes to the design feature a larger bore of 1.25 in and a longer stroke length of 0.625 inches. The motor was able to run at a similar nature but at a lower pressure of 30-40 Psi.
Purchase Motor V2 here:
For my 3rd prototype, I wanted to add a second cylinder. I went with a bore of 1 inch and kept the stroke at 0.625 inches. I also decided to include ball bearings to get rid of some surface friction between the crankshaft and the engine block. At similar pressures as V2 (30 - 40 Psi) I was able to get almost double the RPMs of the V2 motor utilizing a flywheel and a laser RPM measurement tool.
Purchase 2 cyl motor here:
After Making the 2 cyl. motor, I decided I wanted something bigger. I increased the piston Dia. to 1.5 inches and increased the stroke to 0.875 inches. I kept the 2 cylinder design the same otherwise. I had to order larger ball bearings due to the increase in size of the crankshaft. The Motor worked in a similar fashion as the first one, except for this model was leaking more air then the first one. This was due to the increase in size of the motor housing and the increase in piston size. If I were to redesign this again, I would add O rings between the housing pieces, and to the air passages that go between 2 parts.