Diesel aircraft engines promise lower fuel burn and cheaper operating costs at a time when every gallon and every kilogram matter in the air. Yet as manufacturers push these powerplants into more ...

Click to open image viewer. Dr. Hugo Junkers started development of his Diesel aircraft engines in a small factory at Dessau, Germany in 1911. His early engines functioned on the two-stroke cycle ...

Click to open image viewer. Pierre Clerget was inspired by the Gnome to produce a supposedly improved rotary engine in 1911. It was a 7-cylinder, 11.88 liter (725 cu in) engine rated at 60 kW (80 hp) ...