(see Dair and Diesel-Tech). This is Diesel Air Ltd. (DAIR). The Dair-100 model has 4 cylinders with opposed pistons two to two, according to the section shown. It gives 100 hp.

"Diesel-Air"

-They are positioned horizontally. The famous German Junkers Jumo engine of WWII had this system but in a vertical position (see Junkers).