Over the Summer of 2024, I was enrolled in a manufacturing processes class where students were separated into groups and were required to construct an air-powered engine known as the 'Pipsqueak Engine.' Many components of the engine were manufactured from manual machining operations on the Lathe and Mill, while other components such as the fly wheel were sand-casted, and the crank wheel were created by powder injection molding.
The constructed engine was able to pass all tests of operating at 30 psi for 30+ seconds, and it was able to function with an air intake pressure as low as 8 psi. A prototyping packet consisting of engineering drawings and process sheets for each part was also created and submitted with the engine. It was found that all manufactured parts were within tolerance of the drawings, and process sheets adequately described manufacturing procedures.
A video of the machine's performance, as well as the prototyping packet are available to view below.