In 2003 and in the Czech Republic, they started flight testing of the ULM diesel engine shown below.

-It gives 110 hp, weighs 80 kilos, and consumes only 3 liters per hour.

“Exposed Motordesign engine”

-This engine is a three-cylinder, liquid-cooled engine. In the following photograph it is showed in detail.

“Motordesign, detailed”