Hohenemser, worked his remaining years in the United States to prove Flettner's idea that properly designed flexible helicopter-type rotors are more suitable for producing electricity from the wind than rigid airplane-type rotors. An offshore wind energy project announced in February 2017, involving Seawind Ocean Technology B.V., aims to demonstrate the wind energy applications put forth by Anton Flettner, Kurt Hohenemser, and Glidden Doman in harsh wind and sea conditions. Anton Flettner died at age 76 in New York City on December 29, 1961. Among his many distinctions, Anton Flettner was an honorary member of the American Helicopter Society and the Convertible Aircraft Pioneers. Flettner's birthplace home and tomb are national historic protected monuments in Germany. Aircraft built by Flettner Flugzeugbau GmbH Flettner Fl 184 Flettner Fl 185 Flettner Fl 265 Flettner Fl 282 Flettner Fl 285 Flettner Fl 339 See also Autogyros Flettner ship, a schooner that derives its thrust using the Magnus effect Flettner airplane, an airplane that derives its lift using the Magnus effect Flettner Fl 184 helicopter-gyroplane hybrid Flettner Fl 185 helicopter Flettner Fl 265 helicopter Flettner Fl 282 "Kolibri" helicopter Gyrodynes and Heliplanes Charles Kaman References External links New York Times post about Anton Flettner The story of the rotor on Open Library Flettner rotor ventilator Flettner Ventilator Limited Flettner Flugzeubau GmbH Flettner Fl 285 Flettner Fl 339 Norwegian project Dr. Techn. Olav Olsen Seawind 1885 births 1961 deaths Aviation pioneers German emigrants to the United States German people of World War II German aerospace engineers 20th-century German inventors People from Main-Taunus-Kreis Engineers from Hesse