One stroke engine

[ephect]

Interesting article in Drive.com.au. 500cc engine, one stroke (technically 2 stroke) with 120kw output.

https://www.thedrive.com/news/compa...oke-engine-immediately-installs-it-in-a-miata

 

[Deuce]

Those pistons look inspired by roller lifters

 

[ephect]

It's quite a decent engine design, minimal wear and tear, minimal parts.

 

[J_D 2.0]

Here’s a vid from one of my favourite YouTube channels about it. It’s basically the same concept as a variable displacement AC compressor but with opposing cylinders.