PVC air cannons are great, and everyone should build one of these at some point in their life, but what really makes this build exceptional is the valve. [Ben] created a piston valve for this ...

Ferrari has filed a patent for an engine with oval-shaped pistons. The design shortens powertrain length without losing ...

Following is a transcript of the video. Narrator: Engines are made up of over 300 bolts and dozens of moving parts, like pistons and valve springs, that all work together to turn combustion into ...