With that installed, the solenoids click away and spin the crankshaft ... the proof of concept that these tiny electric engines actually work is a welcomed addition to [Emiel]’s collection ...

The latter two make up a clever electrical switch that synchronizes the drive of the solenoid with the flywheel. It’s amusing to hear [Matthias] mention that this engine isn’t very practical.

Discover the intricate process of building a powerful solenoid boxer engine. This step-by-step guide shows the detailed assembly, focusing on each critical component and technique.