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

Four-stroke engines are also more efficient ... it's important to get the right diesel engine for the job. For the most part, it boils down to three options — and more realistically, only ...

As it turns out, you can indeed build a two-stroke engine from scratch, using little more than some metal piping and other parts from the ... s lips is whether a four-stroke one would be nearly ...