This is Howells Aero Engine, builder of "Diesel Air Ltd" (DAIR-100).

-This engine maintains the same structure but is known as HAE-100. It is a supercharged, 2-cylinder, diesel engine with four opposite pistons using the two-stroke cycle.

-It runs on Jet A-1 and automotive Gasoil. The power is 100 hp at 2,500 rpm. Below we offer a computer image.

“HAE-100”