Now the four piston valves, firing their four strokes, in…

Now the four piston valves, firing their four strokes, in beautiful synchronism. Fuel, compression, power, exhaust… and in an animated GIF they never run out of gas.

Of course in reality, they would be arranged one in front of another so as to be turning a common shaft. Instead, these are placed side by side to better see each valve’s movement.

See full post here: The moving GIF2014-07-24.