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Hi,
for the British European Airways,the Saunders-Roe designed a tandem
rotor helicopter project in 1954.
http://www.flightglobal.com/FlightPDFArchive/1954/1954%20-%200665.pdf
for the British European Airways,the Saunders-Roe designed a tandem
rotor helicopter project in 1954.
http://www.flightglobal.com/FlightPDFArchive/1954/1954%20-%200665.pdf