The WN-3 was a Polish seven-cylinder air-cooled radial engine of the 1950s, produced by WSK-Kalisz, designed by Wiktor Narkiewicz.
In 1946, Wiktor Narkiewicz, who prior to the Second World War was technical director of the Czechoslovakian Avia aero-engine factory, was appointed chief designer of the Polish Central Engine Office, and later the Aero-engine department of the Polish Aviation Institute (Instytut Lotnictwa, IL). He led the design of the WN-1, a 65abbr=onNaNabbr=on air-cooled flat-four piston engine which was the first post-war Polish aero-engine, followed by the 285abbr=onNaNabbr=on WN-2 in 1947, but both of these engines failed to enter production.[1]
In 1952 Narkiewicz set up a small design team to design a new seven-cylinder radial engine, the WN-3. The first prototype, rated at 300abbr=onNaNabbr=on was completed in 1954, and by the time testing was completed in 1955, the engine's power rose to 330abbr=onNaNabbr=on.[1] The WN-3 entered production in 1956,[2] powering the PZL TS-8 Bies training aircraft.[1]
The engine was produced in 1957-1960 by WSK-Kalisz in Kalisz,[3] it might be known also as PZL WN-3, or (in Western sources) as Narkiewicz WN-3.[2]