PIASECKI AIRCRAFT CORPORATION
Frank Piasecki developed and flew the USA's second successful helicopter on 11 April 1943 and the world's first tandem rotor helicopter on 7 March 1945; created Piasecki Helicopter Corporation in 1946, this forming subsidiary Piasecki Aircraft Corporation in 1955, following which the original company was sold to Boeing.
Piasecki assisted PZL Swidnik of Poland in FAA certification of the W-3A helicopter, which was awarded in May 1993. Piasecki has exclusive sales agreement for W-3A in the Americas and Pacific Rim countries. W-3A Sokol complies with FAR Pt29, is certified for full IFR operations and has US instrumentation.