It’s an Open Source Two-Stroke Diesel Engine that’s easy for anyone ... a highly successful aircraft engine first produced in the early 1930s and continued production through World War II.

Although they still exist, 2-stroke diesel engines aren't all that common, and 4-stroke engines are what you'll commonly see ...

Dubbed the Powerful, the experimental engine is a 730cc, two-stroke, two-cylinder supercharged and turbocharged diesel that makes between 47 and 67 horsepower and 83 to 107 pound-feet of torque.

We’re introduced to the traditional two-stroke diesel engine as thermally efficient but not smooth-running, and then the gas turbine as smooth but much more inefficient. The free piston engine ...