BMW IV
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The BMW IV was a six-cylinder, water-cooled inline aircraft engine built in Germany in the 1920s. Power was in the 180 kW range.
Preserved BMW IVa
BMW IIIa
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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 succes
The Smithsonian National Air and Space Museum's preserved BMW IIIa, shown with quick-change propeller hub
BMW IIIa at the Luftwaffenmuseum
BMW IIIa specifications