BMW IIIa

BMW IIIa
The Smithsonian National Air and Space Museum's preserved BMW IIIa, shown with quick-change propeller hub
TypeInline engine
ManufacturerBMW
First run1917
Major applicationsFokker D.VII

BMW IIIa was an inline six-cylinder SOHC valvetrain, water-cooled aircraft engine, the first-ever engine produced by BMW, who, at the time, were exclusively an aircraft engine manufacturer. Its success laid the foundation for future BMW engine designs. It is best known as the powerplant of the Fokker D.VIIF, which outperformed any allied aircraft.