BMW took over a license for manufacturing air-cooled radial engines from Pratt & Whitney on 3 January 1928.

The result was the BMW 132, essentially an improved version of the Hornet engine, that went into production in 1933.

[1] The 132 found widespread use in the transport role, remaining the primary powerplant of the Junkers Ju 52 for much of its life, turning the BMW 132 into one of the most important aircraft engines for civilian aircraft during the 1930s.

The most impressive was the first direct flight from Berlin to New York in a four-engined Focke-Wulf 200 S-1 Condor.

Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944[3] Related development