Watch this fascinating video offering a glimpse of the insides of an engine.The Warped Perception channel fits a transparent top to a Briggs and Stratton single-cylinder flathead engine. The structure means that from the top of the powerplant you can see the strokes of the cylinder and watch the valves in operation.

Even if you know how an engine functions, seeing it in 4K slow-motion is amazing. You can see the spark plug work and then the explosion as the fuel ignites. The exhaust valve opens to suck away the gases, and then the process begins again. It’s quite mesmerizing.

After showing off how traditional gasoline combusts in the engine, Warped Perception moves to different forms of fuel. Switching to rubbing alcohol, and it makes a huge difference. The spark plug can’t fully ignite the mixture, and the cylinder begins to fill with liquid. There’s still just enough combustion for the piston to keep moving, though.

Finally, the host tries two methods of fueling the powerplant with acetylene gas. First, it goes into the cylinder with a small mixture of alcohol, and the engine seems to run well. There’s far more black smoke than the other fuels, though. Warped Perception then switches purely to acetylene, and the results are initially rather explosive.



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