Edouard Seguin worked in Russia.
The Piasecki H-16 Transporter -LRB- company designation PV-15 -RRB- was a tandem-rotor transport or rescue helicopter designed by Frank Piasecki and built by Piasecki Helicopter .. tandem-rotor. tandem-rotor. Frank Piasecki. Frank Piasecki. Piasecki Helicopter. Piasecki Helicopter. The prototypes were evaluated by the US Air Force and US Army , but the crash of the second test aircraft led to cancelling the project .. US Air Force. United States Air Force. US Army. United States Army