The Napier is a complicated extrapolation of a basic opposed-piston engine. Your average “engine” has cylinders and pistons ...

Why are there four? And what is a stroke, anyway? A modern gas engine most commonly uses pistons and a crankshaft to power the wheels of a car or truck. The piston is basically a round thing on a ...

Instead of each piston having its own connecting rod which bolts directly to the crankshaft, independently of the other ...

Then it's placed inside the piston and the pin connects the two components. Now, the engine can finally be assembled. First, the crankshaft is bolted onto the block. Then the piston is pushed into ...