Smallest W32 Engine

Most people would be happy building any type of functional engine, but hobbyist Jose Manuel Hermo Barreiro, also known as Patelo, wanted to go above and beyond by creating the world’s smallest (yet functional) W-32 engine. After 2,520-hours and 850 hand-machined pieces and 632 individual screws, the engine was finally completed. A compressed air source lets this engine rev just like its real-life counterpart. Continue reading for the video.

[Source]