The video is really helpful to show how it works. The picture really looks like it would be mechanically locked until you really thinking about what is moving and how that works. I had it worked out in my mind from the picture, then the video confirmed that.
Really cool that you got it fabricated and working. I bet it is pretty amusing to hear people argue about why it won't work at these engine shows!

Do you have any drawings or schematics on the inner workings, and what you can't see because of the flywheel? Just curious to learn more.

Thanks for sharing with us!