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The first modern stable helicopter to perform all the roles a modern helicopter can perform was the German Flettner FL 265. It first flew in 1939 and had an enclosed canopy, undercarriage, synchropter rotor configuration that had zero torque problems, was easy to fly, could perform air sea rescue and take off and land from ships at sea, could take off, hover, fly forwards, backwards, sideways and was the first modern helicopter to transition from forward flight into autorotation and back again. Later helicopters based on it's configuration include the world first production helicopter, the Flettner Fl 282, the American Karman Huskie and Karman K-max heavy lift chopper. The Flettner demonstrated all these abilities before Sikorsky first flew his less stable and more primitive Vs-300 The Fl 265 was not the first successful helicopter however and earlier craft performed well such as the FW-61 famous for flying indoors in front of crowds and setting distance and altitude records, and earlier craft such as the single main rotorFlettner Fl 185, French Dorand Breuget etc all were capable of vertical take off and hover. http://www.YouTube.com/watch?v=64fgG2CnHn0 http://www.aviastar.org/helicopters_eng/flettner-265.php http://www.aviastar.org/foto/gallery/flettner/flettner_kolibri_3.jpg

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Q: The first modern helicopter
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