In 1909 the Hungarian pioneers Adorján János and Dedics Ferenc built the Libelle aircraft.

"The Libelle from Adorján & Dedics"

-The designed engine was the Adorján & Dedics, a two cylinder V engine that is currently exhibited in the Science Museum of Budapest.

“Adorján & Dedics, 2 cylinder engine”

-With a cylinder diameter of 120 mm and a stroke of 135 mm it had a displacement of 1,5 ltr. It gave 25 CV at 1600 rpm.