A 2000-frame-per-second video of the inside of a 4-stroke cylinder. See the valves open and close, the plug spark, and the combustion spread around the piston head. Amazing! (Thanks to Kib on Modern Vespa for the link.)
When scooter news breaks, we put it under a tarp in the garage.
A 2000-frame-per-second video of the inside of a 4-stroke cylinder. See the valves open and close, the plug spark, and the combustion spread around the piston head. Amazing! (Thanks to Kib on Modern Vespa for the link.)