|Coolspring Power Museum|
The video shows the startup, running, and shutdown of the engine.
Another video. I hope they complete the plans of hooking up the compressor so that they can run it under load. But they would compress air instead of gas.
Update: I came across some more links to Snow engines in action. Here is a 7:24 video of the Coolspring 600hp Snow engine. I can't find again the video I liked of a 400hp Snow engine. If you do a search, there are quite a few videos out there.