In the 1940s, Russian-born engineer Igor Sikorsky designed the R-4, the first large-scale, mass-produced helicopter in history. Shortly after Sikorsky became the first American to successfully fly a helicopter of his own design, Frank Piasecki became the second, flying his PV-2 in 1943.
Today, both men’s legacies live on: The former’s Sikorsky Aircraft is now the vertical lift subsidiary of Lockheed Martin, while the latter’s Piasecki Aircraft Corp. (PiAC) continues to manufacture rotorcraft and vertical takeoff and landing (VTOL) aircraft.
