Four Inline Air Engine Crankshaft Valves

A 3D-printed four-cylinder inline air engine with a flat-plane crankshaft thatdoubles as the rotating valve. Runs on air duster or compressor—see video linkin description. VIDEOSee it in action: https://youtube.com/shorts/JyIpMv5MYokThis is a four-cylinder air engine with a flat-plane crankshaft. The valves arebuilt into the crankshaft, so it does double duty as both the crankshaft and therotating valve—one compact assembly for timing and crank motion. Bring it to yourdesk and run it on low-pressure air from an air duster or compressor; with alittle baby oil or mineral oil on the moving parts, it comes to life. Once youhave it working, it will all be worthwhile.FEATURES• Four cylinders in a classic inline layout with a flat-plane crankshaft• Crankshaft doubles as the rotating valve—integrated design for simple, reliable timing• Runs on low-pressure air (air duster works; a compressor is even better)• No seals or metal parts required—print and assemble with standard hardware• Educationa